How Poor Patient Cooperation Affects Orthodontic Treatment

Patient compliance in orthodontics is an important component of successful treatment. Orthodontic therapy requires more than biomechanical control by the clinician; patients must also participate through adequate oral hygiene, attendance at appointments, prescribed appliance wear, elastics use, and adherence to post-treatment retention protocols.

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The term irresponsibility is clinically imprecise because inadequate adherence may result from multiple factors, including insufficient understanding, motivation, treatment burden, discomfort, forgetfulness, family circumstances, or difficulties following prescribed instructions. Contemporary literature therefore favors the terms patient adherence, compliance, and cooperation when describing these behaviors.

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🔹 What Does Poor Orthodontic Compliance Mean?
Poor orthodontic compliance refers to inadequate adherence to treatment-related recommendations. It may involve one or several behaviors:

▪️ Missing or repeatedly rescheduling orthodontic appointments.
▪️ Inadequate oral hygiene during treatment.
▪️ Failure to wear removable appliances for the prescribed duration.
▪️ Inconsistent use of intermaxillary elastics.
▪️ Repeated appliance breakage associated with inappropriate habits or failure to follow instructions.
▪️ Failure to follow dietary recommendations with fixed appliances.
▪️ Inadequate use of retainers after active treatment.

Importantly, adherence is multidimensional. A patient may attend appointments consistently but demonstrate inadequate appliance wear or oral hygiene. Consequently, compliance should not be assessed using a single behavior or isolated clinical observation.

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🔹 Why Does Patient Adherence Matter?
Orthodontic treatment is based on a combination of professional management and patient participation. Poor adherence can interfere with treatment progression, particularly when treatment depends on removable appliances, elastics, or other patient-controlled components.
A systematic review and meta-analysis found that compliance with removable orthodontic appliances and adjuncts was generally suboptimal, while patients frequently overestimated their actual appliance wear time when compared with objective measurements.
Similarly, adherence to appointments and oral hygiene represents an important component of treatment management. A systematic review of randomized controlled trials found that reminder interventions reduced missed appointments and improved oral-hygiene-related outcomes in orthodontic patients.

📊 Common Clinical Consequences

Compliance Problem	Potential Clinical Consequence
Poor appliance wear	Reduced effectiveness of removable appliances
Inconsistent elastic use	Slower or less predictable correction of the targeted discrepancy
Missed appointments	Delayed monitoring and treatment adjustments
Poor oral hygiene	Increased risk of plaque accumulation and white spot lesions
Repeated bracket breakage	Additional appointments and interruptions in treatment
Poor retainer adherence	Increased risk of post-treatment tooth movement

🔹 Factors Associated With Poor Compliance
Patient adherence should not be interpreted simply as a matter of willingness or discipline. The 2024 scoping review of orthodontic adherence identified a broad and heterogeneous literature and concluded that there is no conclusive evidence for a single set of factors that consistently determines adherence.
Relevant factors may include:

1. Understanding of the Treatment
Patients who do not clearly understand the purpose of an appliance, elastic, or hygiene recommendation may have difficulty maintaining the required behavior.

2. Treatment Burden
Long treatment periods, discomfort, frequent instructions, and removable appliances can increase the practical burden of treatment.

3. Motivation and Expectations
Patient expectations can influence cooperation, satisfaction, and treatment-related behaviors. A systematic review has identified expectations as a potentially relevant patient-centered factor in orthodontic treatment.

4. Forgetfulness and Daily Routine
Some adherence problems are behavioral rather than intentional. Appointment reminders and digital communication can therefore provide useful support. Evidence from systematic reviews indicates that reminder systems can improve appointment attendance and oral-hygiene behaviors.

5. Family and Social Factors
For younger patients, adherence may depend partly on parental or caregiver involvement. Recent evidence suggests that parental attitudes and reasonable patient motivation can be relevant patient-centered factors associated with orthodontic treatment success.

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🔹 How Should the Orthodontist Assess Compliance?
Assessment should be objective, continuous, and nonjudgmental. Useful indicators include:

▪️ Appointment attendance.
▪️ Appliance wear when objectively measurable.
▪️ Elastic compliance.
▪️ Oral-hygiene status.
▪️ Frequency of bracket or appliance breakage.
▪️ Retainer use during the retention phase.
▪️ Patient and caregiver understanding of instructions.

Self-reported compliance should be interpreted cautiously because studies have demonstrated discrepancies between reported and objectively measured appliance wear.

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🔹 Orthodontic Compliance: Clinical Assessment

📊 Orthodontic Compliance: Clinical Assessment

Parameter	What to Assess	Clinical Action
Appointments	Attendance, cancellations, and repeated delays	Identify barriers and reinforce scheduling support
Appliance wear	Prescribed versus actual wear when measurable	Review instructions and consider objective monitoring
Elastics	Frequency and consistency of use	Clarify wear schedule and demonstrate placement
Oral hygiene	Plaque accumulation and gingival condition	Provide targeted hygiene instruction and reinforcement
Appliance integrity	Bracket failures, appliance damage, or loss	Identify behavioral or practical causes and modify instructions
Retention	Retainer wear and maintenance	Reinforce long-term retention requirements

🔹 Improving Patient Adherence
Evidence does not support a single universal strategy for improving orthodontic compliance. Instead, interventions should be individualized according to the specific barrier identified.

Effective clinical approaches may include:
▪️ Clear and repeated instructions about what the patient must do and why it matters.
▪️ Demonstration of appliances and elastics rather than relying exclusively on verbal instructions.
▪️ Written or digital instructions that the patient can review later.
▪️ Appointment reminders through digital communication.
▪️ Regular reinforcement of oral-hygiene behaviors.
▪️ Early identification of repeated non-adherence.
▪️ Involving parents or caregivers when appropriate.
▪️ Objective monitoring when appliance wear is clinically important.

Digital communication and remote monitoring technologies have shown potential for improving appointment adherence and oral-hygiene behaviors, although evidence for individual technologies and protocols remains heterogeneous.

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💬 Discussion
The concept of patient compliance in orthodontics should be approached as a clinical variable rather than a moral judgment. Labeling a patient as “irresponsible” may obscure the underlying reason for inadequate adherence and does not provide a mechanism for improving treatment behavior.
Current evidence indicates that adherence is influenced by multiple interacting factors, and there is insufficient evidence to identify one universally effective intervention.
The distinction between reported and actual compliance is also clinically relevant. Objective monitoring studies demonstrate that patients may overestimate appliance wear, emphasizing the limitations of relying exclusively on self-reporting.
Therefore, the orthodontist should identify specific adherence problems, determine their likely barriers, provide targeted interventions, and reassess the response throughout treatment.

🎯 Clinical Recommendations
1. Assess adherence from the beginning of treatment, particularly when therapy depends heavily on patient-controlled appliances or elastics.
2. Replace generalized instructions with specific behavioral instructions that define what the patient should do, when, and for how long.
3. Use reminders for appointments and other recurring treatment tasks when appropriate; evidence supports their usefulness for improving attendance and some oral-hygiene outcomes.
4. Do not rely exclusively on self-reported appliance wear when objective monitoring is available and clinically justified.
5. Investigate the cause of non-adherence before modifying treatment, distinguishing knowledge gaps, practical barriers, discomfort, motivation, and family-related factors.
6. Document repeated adherence problems objectively and reassess the patient's ability to follow the prescribed treatment protocol.
7. Use individualized reinforcement rather than punitive communication, particularly in adolescent patients.

✍️ Conclusion
Orthodontic patient compliance is an important component of treatment management, but poor adherence should not automatically be interpreted as patient irresponsibility. It is a multidimensional behavior influenced by treatment demands, understanding, motivation, routine, communication, and social factors.
A structured approach based on early identification, objective assessment, clear communication, reminders, and individualized intervention can help clinicians address adherence problems while maintaining a professional and patient-centered treatment relationship. Current evidence supports these strategies, although additional high-quality research is still needed to establish which interventions are most effective across different orthodontic populations.

📚 References

✔ Aljabaa, A., McDonald, F., & Newton, J. T. (2015). A systematic review of randomized controlled trials of interventions to improve adherence among orthodontic patients aged 12 to 18. The Angle Orthodontist, 85(2), 305–313. https://doi.org/10.2319/031214-184.1
✔ Al-Moghrabi, D., Salazar, F. C., Pandis, N., & Fleming, P. S. (2017). Compliance with removable orthodontic appliances and adjuncts: A systematic review and meta-analysis. American Journal of Orthodontics and Dentofacial Orthopedics, 152(1), 17–32. https://doi.org/10.1016/j.ajodo.2017.03.019
✔ Mohammed, H., Rizk, M. Z., Wafaie, K., Ulhaq, A., & Almuzian, M. (2019). Reminders improve oral hygiene and adherence to appointments in orthodontic patients: A systematic review and meta-analysis. European Journal of Orthodontics, 41(2), 204–213. https://doi.org/10.1093/ejo/cjy045
✔ van der Bie, R. M., Bos, A., Bruers, J. J. M., & Jonkman, R. E. G. (2024). Patient adherence in orthodontics: A scoping review. BDJ Open, 10, 58. https://doi.org/10.1038/s41405-024-00235-2
✔ Wafaie, K., Rizk, M. Z., Basyouni, M. E., Daniel, B., & Mohammed, H. (2023). Tele-orthodontics and sensor-based technologies: A systematic review of interventions that monitor and improve compliance of orthodontic patients. European Journal of Orthodontics, 45(3), 245–255. https://doi.org/10.1093/ejo/cjad004

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Bracket Positioning in Orthodontics: Why It Matters

Bracket positioning in orthodontics is a fundamental component of fixed-appliance treatment. The prescription incorporated into a bracket can only be expressed as intended when the bracket is positioned accurately relative to the tooth's clinical anatomy.

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Errors in vertical height, mesiodistal position, angulation, rotation, or buccolingual orientation can alter the expression of tip and torque, potentially producing unwanted tooth movements and increasing the need for bracket repositioning or compensatory archwire bends.

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The importance of accurate bracket placement is particularly relevant to preadjusted appliances, where much of the intended tooth movement is incorporated into the bracket prescription.

🔹 Why Bracket Positioning Matters
The straight-wire concept developed from Andrews' work relies on accurately transferring the prescribed bracket geometry to the teeth. Andrews' six keys of normal occlusion provided an important foundation for the development of preadjusted orthodontic appliances.

Bracket positioning influences several clinically relevant variables:
▪️ Vertical position: affects the expression of torque and the final vertical position of the tooth.
▪️ Mesiodistal position: influences crown angulation and the relationship between adjacent teeth.
▪️ Bracket angulation: directly affects tip and can contribute to root-position discrepancies.
▪️ Buccolingual position: influences torque expression and transverse tooth position.
▪️ Rotation: can produce unwanted mesiodistal or buccolingual discrepancies.

The effect of vertical positioning is particularly important because the curvature of the facial surface changes along the clinical crown. A finite-element study demonstrated that altering vertical bracket position can modify the torque delivered to a tooth and consequently affect periodontal ligament stresses.

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🔹 Key Bracket Positioning Variables

Position Variable	Potential Effect	Clinical Relevance
Vertical	Changes torque and vertical tooth position	Important for overbite control and finishing
Mesiodistal	Influences crown angulation and contact relationships	Important for alignment and root parallelism
Angulation	Alters programmed tip	Can affect crown and root positioning
Buccolingual	Changes torque expression	Relevant to incisor inclination and posterior transverse control
Rotation	Produces rotational discrepancies	May compromise alignment and occlusal contacts

🔹 Bracket Positioning and Torque Expression
Torque is not determined solely by the bracket prescription. The interaction between the bracket, archwire, and three-dimensional morphology of the tooth determines how much programmed torque is ultimately expressed.
This is especially important on teeth with pronounced facial curvature. Research on mandibular teeth demonstrated that a 1-mm vertical displacement of the bracket could modify the effective torque, with the magnitude of the change varying according to tooth type. The reported effect was approximately 2° for mandibular incisors, 3° for canines, and substantially greater for premolars and molars.
Therefore, a bracket that appears only slightly displaced clinically may have a meaningful biomechanical consequence.

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🔹 Bracket Positioning and Finishing
Bracket-positioning errors can become increasingly apparent during rectangular-wire stages, when the appliance is expected to express its programmed tip and torque.

Incorrect positioning may lead to:
▪️ Additional bracket repositioning.
▪️ Unplanned archwire bends.
▪️ Persistent rotations.
▪️ Inadequate root parallelism.
▪️ Unwanted incisor inclination.
▪️ Increased finishing time.
▪️ Additional appointments.

A clinical protocol published on bracket positioning emphasizes early identification of errors through clinical and radiographic assessment, followed by systematic correction rather than compensating repeatedly with archwire bends.
This is particularly relevant because compensatory wire bending can mask the original bracket-positioning problem without necessarily providing the same level of control as correctly positioned brackets.

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🔹 Direct vs. Indirect Bracket Positioning
Both direct and indirect bonding techniques can achieve clinically acceptable results, but neither eliminates positioning errors completely.
A systematic review and meta-analysis of indirect bonding found mean transfer errors of approximately 0.08–0.14 mm for linear measurements and 0.93–1.13° for angular measurements, depending on the dimension evaluated.
More recent digital workflows have expanded the possibilities for virtual bracket positioning. A 2024 randomized clinical trial found smaller deviations from the planned position with fully digital indirect bonding compared with conventional direct bonding, although the indirect technique also showed more bonding failures in that study.
Importantly, the evidence does not establish that indirect bonding universally eliminates the need for clinical correction. A 2026 randomized controlled trial reported no significant difference between computer-aided indirect and direct bonding in overall treatment outcomes or in the proportion of teeth requiring rebonding or finishing bends because of inaccurate bracket positioning.
Digital and AI-assisted workflows are promising, but they should be regarded as tools for improving positioning consistency rather than substitutes for clinical verification. Recent research has shown good linear accuracy but continuing challenges in accurately controlling bracket angulation.

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💬 Discussion
The clinical significance of bracket positioning lies in the relationship between bracket geometry and tooth anatomy. A preadjusted appliance cannot fully compensate for an incorrectly positioned bracket simply because the prescription itself is appropriate.
Current evidence supports three important principles. First, positioning accuracy remains fundamental to predictable fixed-appliance treatment. Second, both direct and indirect techniques are subject to clinically relevant errors. Third, digital planning and indirect bonding can improve control of the intended bracket position, but clinical verification remains essential.
The interpretation of accuracy measurements also requires caution. Published studies use different reference systems and definitions of clinically acceptable error, making direct comparison between studies difficult. A recent methodological umbrella review highlighted substantial heterogeneity in how transfer accuracy is defined and measured.
Consequently, bracket positioning should be considered an active component of treatment planning and biomechanics, rather than merely a bonding procedure.

🎯 Clinical Recommendations
1. Establish a reproducible positioning reference for each tooth rather than relying exclusively on visual estimation.
2. Evaluate vertical position carefully, particularly when overbite control and torque expression are important treatment objectives.
3. Verify angulation and mesiodistal positioning before progressing to stages in which rectangular archwires will express substantial tip and torque.
4. Account for individual tooth morphology. The facial surface is not uniformly curved, so an identical millimetric displacement does not necessarily produce the same biomechanical effect on different teeth.
5. Use digital setups or indirect bonding when they provide a meaningful planning advantage, but verify the transferred position clinically rather than assuming digital precision guarantees clinical accuracy.
6. Correct significant bracket-positioning errors early instead of relying extensively on compensatory wire bends during finishing.

✍️ Conclusion
Bracket positioning in orthodontics directly influences the expression of tip, torque, rotation, and vertical control. Even relatively small positional discrepancies can become clinically relevant when preadjusted appliances and rectangular archwires are used.
Modern indirect and digital workflows can improve the precision of planned bracket placement, but current evidence indicates that clinical assessment and correction remain indispensable. Accurate bracket positioning should therefore be integrated into treatment planning, biomechanics, and finishing protocols rather than treated as a purely technical bonding step.

📚 References

✔ Andrews, L. F. (1972). The six keys to normal occlusion. American Journal of Orthodontics, 62(3), 296–309. https://doi.org/10.1016/S0002-9416(72)90268-0
✔ Bachour, P. C., Klabunde, R. T., & Grünheid, T. (2025). Usefulness of an artificial intelligence-assisted indirect bonding method for optimizing orthodontic bracket positioning. The Angle Orthodontist, 96(1), 93–99. https://doi.org/10.2319/022425-157.1
✔ Hoekstra-van Hout, P. M. J., Hoekstra, J. W. M., Bruggink, R., Bronkhorst, E. M., & Ongkosuwito, E. M. (2024). Direct versus fully digital indirect bracket bonding: A split-mouth randomized clinical trial on accuracy. Clinical Oral Investigations, 28, 557. https://doi.org/10.1007/s00784-024-05950-6
✔ Sabbagh, H., Khazaei, Y., Baumert, U., Hoffmann, L., Wichelhaus, A., & Janjic Rankovic, M. (2022). Bracket transfer accuracy with the indirect bonding technique—A systematic review and meta-analysis. Journal of Clinical Medicine, 11(9), 2568. https://doi.org/10.3390/jcm11092568
Marty, M., Valran, V., & Gebeile-Chauty, S. (2021). Brackets positioning errors and available solutions: A review of the literature. L'Orthodontie ✔ Française, 92(4), 403–419. https://doi.org/10.1684/orthodfr.2021.68
✔ Li, Y., Zhou, L., Chen, M., Du, Y., Gan, Y., Li, B., & Feng, J. (2025). Accuracy of digital indirect bonding technology for customized orthodontic brackets based on personalized typodonts. BMC Oral Health, 25, 478. https://doi.org/10.1186/s12903-025-05777-x

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How Is Adult Orthodontic Treatment Managed?

Adult orthodontic treatment requires a treatment strategy adapted to the biological, periodontal, restorative, and functional characteristics of mature dentitions.

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Unlike growing patients, adults have limited or no remaining skeletal growth, so most corrections must be achieved through controlled orthodontic tooth movement, with orthognathic surgery considered when significant skeletal discrepancies cannot be corrected dentally.

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Adult patients may also present with periodontal attachment loss, gingival recession, missing teeth, extensive restorations, implants, bone defects, previous orthodontic treatment, and reduced alveolar bone volume. Consequently, diagnosis and treatment planning should be individualized rather than based solely on chronological age.

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1. Initial Assessment of the Adult Orthodontic Patient
A comprehensive assessment should establish the patient's dental, skeletal, periodontal, functional, and restorative conditions before appliance placement.

Important diagnostic components include:
▪️ Medical and dental history, including medications, systemic conditions, previous orthodontic treatment, and dental trauma.
▪️ Periodontal examination, including probing depths, bleeding on probing, gingival phenotype, recession, mobility, and attachment levels.
▪️ Evaluation of caries, existing restorations, missing teeth, endodontically treated teeth, and prosthetic requirements.
▪️ Assessment of occlusion, tooth position, overjet, overbite, transverse relationships, and functional contacts.
▪️ Appropriate radiographic evaluation, including panoramic and periapical imaging when indicated.
▪️ Cephalometric and photographic analysis when required for diagnosis and treatment planning.
▪️ Evaluation of the available alveolar bone envelope, particularly before significant incisor proclination or bodily tooth movement.

Periodontal inflammation should be controlled before active orthodontic treatment. In patients with periodontitis or a reduced periodontium, orthodontic treatment should be integrated with periodontal therapy and ongoing periodontal maintenance. Recent expert consensus emphasizes coordinated diagnosis, personalized biomechanics, multidisciplinary collaboration, and long-term periodontal and orthodontic follow-up.

2. Key Differences in Adult Orthodontic Management
The principal difference between adult and adolescent orthodontics is not simply treatment duration. It is the biological and restorative context in which tooth movement occurs.

Factor	Adult Patient	Clinical Implication
Skeletal growth	Limited or absent	Skeletal discrepancies may require camouflage or orthognathic surgery.
Periodontal status	May include attachment loss, recession, or reduced periodontal support	Forces and tooth movement must respect the periodontal envelope.
Restorative status	Crowns, bridges, implants, restorations, and missing teeth may be present	Treatment may require restorative or prosthodontic coordination.
Alveolar bone	Dehiscence or fenestration may already exist	Avoid excessive movement beyond the alveolar housing.
Anchorage	May be compromised by missing or periodontally affected teeth	Temporary anchorage devices may be useful in selected cases.
Retention	Long-term stability remains essential	Retention should be planned from the beginning of treatment.

3. Biomechanical Considerations
Controlled biomechanics are particularly important when the adult dentition has reduced periodontal support or limited alveolar bone.

Treatment should prioritize:
▪️ Appropriate force magnitude and direction.
▪️ Controlled tipping versus bodily movement according to the periodontal anatomy.
▪️ Effective anchorage management.
▪️ Avoidance of unnecessary incisor proclination.
▪️ Careful management of extraction spaces when indicated.
▪️ Periodic assessment of tooth mobility and periodontal response.

Orthodontically induced inflammatory root resorption remains a recognized adverse effect of tooth movement. Evidence indicates that orthodontic forces can increase the occurrence of root resorption, although individual susceptibility and treatment-related factors vary considerably.
Similarly, gingival recession is associated with several factors, including pre-existing mucogingival characteristics, oral hygiene, orthodontic intervention, and particularly excessive incisor proclination in susceptible patients.

4. Fixed Appliances vs Clear Aligners vs Lingual Orthodontics
Adult patients frequently prioritize aesthetics, comfort, and treatment convenience. However, appliance selection should be determined by malocclusion complexity, required tooth movements, periodontal conditions, anchorage requirements, and patient compliance, rather than aesthetics alone.

Technique	Main Advantages	Main Limitations	Typical Consideration
Labial fixed appliances	Precise three-dimensional control; suitable for complex movements	Visible; can increase plaque-retentive areas	Useful for complex malocclusions and extraction mechanics.
Clear aligners	Aesthetic, removable, and facilitates oral hygiene	Effectiveness depends on compliance and movement predictability	Particularly useful for selected mild-to-moderate malocclusions.
Lingual fixed appliances	High aesthetic concealment with fixed-appliance biomechanics	Tongue discomfort and speech effects may occur	Consider when aesthetics are a major concern and case complexity permits.

Recent evidence suggests that clear aligners and fixed appliances can both achieve orthodontic treatment objectives, particularly in non-extraction cases, although treatment outcomes vary according to movement type and case complexity. Fixed appliances may provide greater control for certain movements, particularly rotation, torque, and complex extraction mechanics.
Lingual appliances provide an aesthetic fixed alternative, but systematic-review evidence has reported greater speech and oral discomfort compared with labial appliances, with the overall certainty of evidence remaining limited.

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6. Treatment Duration and Patient Expectations
Adult treatment should be planned according to the biological and biomechanical requirements of the individual case rather than applying an age-based assumption that treatment must necessarily be longer.
A systematic review comparing adolescents and adults found no significant difference in overall comprehensive treatment duration with fixed appliances, although certain movements, such as alignment of palatally displaced canines, may require more time in adults. The certainty of this evidence was low because most included studies were non-randomized.

Treatment duration can increase when cases involve:
▪️ Severe periodontal compromise.
▪️ Extensive tooth movement.
▪️ Extraction mechanics.
▪️ Impacted teeth.
▪️ Complex skeletal discrepancies.
▪️ Poor appliance compliance.
▪️ Additional restorative or surgical procedures.

7. Retention in Adult Orthodontics
Retention should be considered an integral component of adult orthodontic treatment, not simply a post-treatment procedure.

The retention protocol should consider:
▪️ Initial malocclusion.
▪️ Degree of periodontal support.
▪️ Rotational corrections.
▪️ Diastema closure.
▪️ Incisor alignment.
▪️ Patient-specific relapse risk.
▪️ Long-term oral hygiene and periodontal maintenance.

Patients with reduced periodontal support may require coordinated orthodontic and periodontal follow-up to maintain the functional and periodontal benefits achieved during treatment.

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💬 Discussion
Successful adult orthodontic treatment depends primarily on accurate diagnosis and biological control rather than on chronological age. The absence of skeletal growth shifts the emphasis toward dentoalveolar compensation, precise biomechanics, anchorage control, and interdisciplinary treatment when skeletal, periodontal, restorative, or prosthetic problems coexist.
Appliance selection should be individualized. Current evidence does not support treating clear aligners, conventional fixed appliances, or lingual appliances as universally interchangeable. Their clinical performance depends on the specific movements required, treatment complexity, periodontal condition, and patient adherence.
The most important clinical risks in adult treatment include periodontal deterioration, gingival recession, alveolar bone limitations, root resorption, and instability after treatment. These risks can be reduced through appropriate diagnosis, controlled biomechanics, preventive periodontal care, and an individualized retention strategy.

✍️ Conclusion
Managing orthodontic treatment in adults requires a multidisciplinary and risk-oriented approach. The clinician should evaluate periodontal health, alveolar bone, restorations, missing teeth, skeletal relationships, anchorage requirements, and the patient's treatment objectives before selecting the appliance system.
Fixed appliances, clear aligners, and lingual orthodontics can all be appropriate in adults, but their indications differ according to movement complexity and clinical requirements. Long-term success depends not only on achieving alignment and occlusion but also on maintaining periodontal health and orthodontic stability.

🎯 Clinical Recommendations
1. Complete periodontal assessment before active orthodontic treatment, particularly in adults with previous periodontitis, recession, mobility, or reduced periodontal support.
2. Define the alveolar boundaries before significant incisor movement; avoid mechanically driven expansion or proclination that exceeds the patient's periodontal envelope.
3. Select the appliance according to the required tooth movements and case complexity, rather than aesthetic preference alone.
4. Use individualized anchorage control when missing teeth, reduced periodontal support, or extensive space closure compromises conventional anchorage.
5. Monitor periodontal and dental changes throughout treatment, with additional radiographic evaluation when clinical findings indicate increased risk.
6. Establish the retention strategy before treatment begins and maintain long-term follow-up when relapse or periodontal risk is elevated.

📚 References

✔ Abbing, A., Koretsi, V., Eliades, T., & Papageorgiou, S. N. (2020). Duration of orthodontic treatment with fixed appliances in adolescents and adults: A systematic review with meta-analysis. European Journal of Orthodontics, 42(3), 341–347. https://doi.org/10.1093/ejo/cjaa003
✔ Barbosa-Liz, D. M., et al. (2024). Overview of systematic reviews on periodontal-orthodontic interactions: A comprehensive literature analysis. Orthodontics & Craniofacial Research, 27(2), 193–202. https://doi.org/10.1111/ocr.12720
✔ Muro, M. P., et al. (2023). Effectiveness and predictability of treatment with clear orthodontic aligners: A scoping review. International Orthodontics, 21(2), 100755. https://doi.org/10.1016/j.ortho.2023.100755
✔ Papageorgiou, S. N., Gölz, L., Jäger, A., Eliades, T., & Bourauel, C. (2016). Lingual vs. labial fixed orthodontic appliances: Systematic review and meta-analysis of treatment effects. European Journal of Oral Sciences, 124(2), 105–118. https://doi.org/10.1111/eos.12250
✔ Singh, S., Jain, R. K., & Balasubramaniam, A. (2024). Comparative assessment of external apical root resorption between subjects treated with clear aligners and fixed orthodontic appliances: A systematic review and meta-analysis. Journal of Dental Research, Dental Clinics, Dental Prospects, 18(2). https://doi.org/10.34172/joddd.40932
✔ Ubuzima, P., Nshimiyimana, E., Michelogiannakis, D., Mukeshimana, C., Mazimpaka, P., Habumugisha, J., Turkkahraman, H., & Kamioka, H. (2026). Comparative effectiveness of clear aligners and fixed appliances in orthodontic movement of the anterior teeth in adults: A systematic review. International Orthodontics, 24(2), 101084. https://doi.org/10.1016/j.ortho.2025.101084
✔ Zhong, W., et al. (2025). Expert consensus on orthodontic treatment of patients with periodontal disease. International Journal of Oral Science, 17(1), 27. https://doi.org/10.1038/s41368-025-00356-w

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Metal Braces Benefits: Why Are They Still Used?

Metal braces, particularly conventional stainless-steel brackets, remain one of the most widely used fixed orthodontic appliances.

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Their continued clinical use is related to their mechanical properties, versatility, durability, and ability to provide precise three-dimensional control of tooth movement.

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Although newer orthodontic systems, including ceramic brackets, self-ligating brackets, and clear aligners, offer alternative treatment approaches, conventional metal brackets continue to have an important role in comprehensive orthodontic therapy.
Current evidence indicates that the choice of appliance should be based on the patient's malocclusion, treatment objectives, biomechanics, esthetic preferences, and clinical circumstances rather than on the bracket material alone.

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🔹 What Are the Main Benefits of Metal Braces?

1. High Mechanical Strength and Durability
Stainless-steel brackets have high resistance to deformation and fracture under normal clinical conditions. This mechanical stability is particularly useful when orthodontic treatment requires substantial wire engagement, torque expression, or complex biomechanics.
Their durability also makes them suitable for prolonged fixed-appliance treatment.

2. Precise Control of Tooth Movement
One of the principal advantages of fixed metal appliances is their ability to maintain continuous mechanical control over individual teeth.
The bracket slot–archwire relationship permits the clinician to control:
▪️ Angulation
▪️ Inclination and torque
▪️ Rotation
▪️ Mesiodistal positioning
▪️ Vertical tooth position
The degree of torque expression depends on factors such as bracket slot dimensions, archwire size, material, and bracket–wire interaction. Therefore, the presence of a metal bracket alone does not guarantee a specific treatment effect.

3. Versatility in Orthodontic Mechanics
Metal brackets are compatible with a wide range of orthodontic mechanics, including:
▪️ Elastic chains
▪️ Intermaxillary elastics
▪️ Closing loops
▪️ Open and closed coil springs
▪️ Auxiliary wires
▪️ Temporary anchorage device–supported mechanics
This versatility is particularly relevant in complex malocclusions, extraction cases, space closure, and three-dimensional tooth-position correction.

4. Effective Treatment of Complex Malocclusions
Fixed appliances provide continuous force application and allow the orthodontist to control individual teeth throughout treatment. This can be particularly useful when substantial changes in tooth position or occlusal relationships are required.
Systematic reviews confirm that fixed appliances can produce substantial improvements in occlusal outcomes, although treatment effectiveness is influenced by the initial malocclusion and treatment protocol rather than by the bracket type alone.

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5. Predictable Integration With Different Archwires
Metal brackets can be used throughout the different stages of fixed orthodontic treatment, from initial alignment to finishing.
A typical treatment sequence may incorporate nickel-titanium archwires during alignment and leveling, followed by progressively more rigid wires for space control, torque expression, and finishing.
This allows the clinician to modify the biomechanics according to the treatment phase.

6. Resistance to Clinical Wear
The oral environment exposes orthodontic materials to mechanical forces, moisture, temperature fluctuations, plaque, and chemical changes. Although bracket surfaces can undergo clinical changes and friction may increase after intraoral aging, stainless-steel brackets remain mechanically suitable for long-term orthodontic use.

7. Established Clinical Evidence
Conventional fixed appliances have been investigated extensively in clinical orthodontics. Systematic reviews have reported average comprehensive fixed-appliance treatment durations of approximately 20–25 months, although considerable variation exists between patients and treatment protocols.
Importantly, current evidence does not support attributing treatment duration or final occlusal quality exclusively to bracket material. Patient characteristics, malocclusion severity, extraction requirements, biomechanics, and treatment objectives can substantially influence outcomes.

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🔹 Metal Braces: Key Benefits at a Glance

Benefit	Clinical Relevance
Durability	Resistant to deformation and suitable for prolonged fixed treatment.
Three-dimensional control	Allows control of angulation, torque, rotation, and tooth position.
Biomechanical versatility	Compatible with elastics, springs, loops, chains, and auxiliary mechanics.
Complex case management	Useful when extensive tooth movement and detailed occlusal correction are required.
Archwire compatibility	Supports different archwire materials and dimensions throughout treatment.

💬 Discussion
The main advantage of metal orthodontic brackets is not simply their material composition but the combination of mechanical strength, fixed tooth control, and biomechanical versatility. These characteristics make them applicable to a broad spectrum of orthodontic treatments.
However, the evidence does not demonstrate that metal brackets inherently produce superior treatment outcomes compared with every alternative appliance. Recent systematic evidence indicates that differences between bracket designs may have limited influence on overall treatment duration or occlusal outcome.
Bracket selection should therefore be incorporated into a broader treatment strategy that considers malocclusion severity, anchorage requirements, desired tooth movements, patient factors, esthetics, and clinician-controlled biomechanics.

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✍️ Conclusion
Metal braces remain a reliable and versatile option for fixed orthodontic treatment. Their principal advantages include durability, precise tooth control, compatibility with diverse biomechanical systems, and extensive clinical experience.
Rather than considering metal brackets inherently superior, their value should be understood in relation to the specific treatment objectives and biomechanical requirements of each patient.

🎯 Clinical Recommendations
▪️ Select metal brackets when precise fixed-appliance control and broad biomechanical versatility are required.
▪️ Match bracket slot, prescription, and archwire dimensions to the intended tooth movements rather than relying solely on bracket material.
▪️ Consider the entire biomechanical system—including ligation, archwire properties, anchorage, and auxiliaries—when planning treatment.
▪️ Avoid promising shorter treatment solely because metal brackets are being used; treatment duration is multifactorial.

📚 References

✔ Abbing, A., Koretsi, V., Eliades, T., & Papageorgiou, S. N. (2020). Duration of orthodontic treatment with fixed appliances in adolescents and adults: A systematic review with meta-analysis. Progress in Orthodontics, 21, 37. https://doi.org/10.1186/s40510-020-00334-4
✔ Papageorgiou, S. N., Höchli, D., & Eliades, T. (2017). Outcomes of comprehensive fixed appliance orthodontic treatment: A systematic review with meta-analysis and methodological overview. Korean Journal of Orthodontics, 47(6), 401–413. https://doi.org/10.4041/kjod.2017.47.6.401
✔ Tsichlaki, A., Chin, S. Y., Pandis, N., & Fleming, P. S. (2016). How long does treatment with fixed orthodontic appliances last? A systematic review. American Journal of Orthodontics and Dentofacial Orthopedics, 149(3), 308–318. https://doi.org/10.1016/j.ajodo.2015.09.020
✔ Wazwaz, F., Seehra, J., Carpenter, G. H., Ireland, A. J., Papageorgiou, S. N., & Cobourne, M. T. (2022). Duration of tooth alignment with fixed appliances: A systematic review and meta-analysis. American Journal of Orthodontics and Dentofacial Orthopedics, 161(1), 20–36. https://doi.org/10.1016/j.ajodo.2021.06.016

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Bionator Technique: Clinical Guide for Class II

The Bionator technique is a removable functional orthodontic appliance approach primarily used for the treatment of growing patients with Class II malocclusion, particularly when mandibular retrusion contributes substantially to the sagittal discrepancy.

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Developed within the functional orthopedic philosophy associated with Balters, the Bionator is designed to influence mandibular posture, neuromuscular function, and dentoalveolar relationships through controlled mandibular advancement.

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Its clinical effects are not exclusively skeletal: contemporary evidence indicates that dentoalveolar changes frequently represent a substantial component of Class II correction, while skeletal effects may occur in appropriately growing patients.

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🔹 What Is the Bionator Technique?
The Bionator is a relatively lightweight, removable functional appliance that positions the mandible anteriorly and modifies the relationship between the upper and lower dental arches.

Its design generally incorporates:
▪️ An acrylic functional body.
▪️ A lingual acrylic component that guides mandibular posture.
▪️ Upper and lower incisor elements adapted according to the treatment objective.
▪️ A labial bow for anterior control.
▪️ Posterior acrylic areas that establish the desired occlusal relationship.
▪️ Selective acrylic trimming to facilitate tooth eruption and dentoalveolar adaptation.


The exact design should be individualized according to the skeletal pattern, vertical dimension, incisor position, overjet, eruption stage, and treatment objectives.

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🔹 Main Indications
The Bionator is most commonly considered when the following characteristics are present:

▪️ Growing patient with Class II malocclusion.
▪️ Mandibular retrognathia or retrusion contributing to the sagittal discrepancy.
▪️ Increased overjet.
▪️ Favorable growth potential.
▪️ Sufficient patient cooperation for removable-appliance therapy.
▪️ A treatment objective that includes mandibular advancement and dentoalveolar correction.

Clinical studies have demonstrated that Bionator treatment can improve molar relationships, overjet, and sagittal skeletal relationships in appropriately selected growing patients.

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🔹 Construction Bite and Mandibular Advancement
The construction bite is one of the most important components of the Bionator technique because it determines the mandibular position incorporated into the appliance.

Mandibular advancement should be established according to the individual patient's:
▪️ Initial overjet.
▪️ Sagittal discrepancy.
▪️ Incisor inclination.
▪️ Vertical facial pattern.
▪️ Temporomandibular joint status.
▪️ Tolerance to mandibular advancement.
▪️ Treatment objectives.

The available evidence does not establish a universally superior advancement protocol for all functional appliances. A systematic review found that incremental advancement may produce somewhat greater short-term mandibular skeletal changes than maximal advancement, but the certainty of evidence was low to very low, and long-term clinical conclusions remain limited.
Therefore, mandibular advancement should be considered an individualized biomechanical prescription rather than a fixed numerical protocol.

🔹 Clinical Effects of the Bionator
The therapeutic response can involve several components:

Component	Potential Clinical Effect
Skeletal	Improvement in the sagittal mandibular relationship during growth.
Dentoalveolar	Correction of the molar relationship and reduction of overjet.
Maxillary dentition	Possible posterior movement or restraint of forward dental displacement.
Mandibular incisors	Possible proclination depending on appliance design and treatment mechanics.
Vertical dimension	Changes influenced by acrylic design, eruption, and individual growth pattern.
Soft tissues	Improvement in the sagittal facial profile may accompany skeletal and dental correction.

Clinical trials have shown that Bionator therapy can produce mandibular growth and anterior mandibular displacement; however, comparative studies indicate that dentoalveolar effects frequently account for a considerable proportion of the overall correction.

🔹 Bionator Technique: Key Clinical Parameters

Parameter	Clinical Consideration
Growth status	Treatment is primarily considered in actively growing patients.
Mandibular position	The construction bite should establish a clinically appropriate advanced mandibular position.
Vertical control	Acrylic design and selective trimming should be adapted to the patient's vertical pattern.
Incisor control	The appliance should account for existing incisor inclination and the desired dentoalveolar response.
Patient cooperation	Treatment effectiveness depends substantially on adequate appliance wear and follow-up.

🔹 Treatment Timing
The growth phase is an important consideration when using the Bionator. Early treatment studies have demonstrated measurable improvements in Class II relationships with Bionator therapy compared with observation, although treatment response varies considerably between individuals. Compliance and initial malocclusion severity have also been associated with treatment effectiveness.
Importantly, early functional treatment should not be interpreted as producing permanent skeletal correction in every patient. Long-term evidence indicates that functional appliances can produce skeletal and dentoalveolar effects, but the magnitude and clinical relevance of skeletal changes are variable.

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🔹 Bionator and Mandibular Growth
One of the principal objectives of the Bionator technique is to take advantage of active mandibular growth.
Research using longitudinal and implant-based methodologies has documented adaptive condylar growth and mandibular remodeling during Bionator therapy.
However, the clinical interpretation should remain cautious. Functional appliance therapy does not simply "create" mandibular growth independently of the patient's biological growth potential. The observed correction represents an interaction between growth modification, mandibular positioning, dentoalveolar adaptation, and appliance-related mechanics.

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🔹 Limitations and Clinical Considerations
Several factors can limit the predictability of Bionator treatment:

▪️ Poor compliance with appliance wear.
▪️ Advanced skeletal maturity or limited remaining growth.
▪️ Severe skeletal Class II discrepancies.
▪️ Excessive mandibular incisor proclination.
▪️ Unfavorable vertical growth pattern.
▪️ Inadequate construction bite.
▪️ Insufficient retention or stabilization after active correction.

The distinction between skeletal and dental correction is particularly important when evaluating treatment outcomes. In controlled clinical research, Bionator therapy has repeatedly demonstrated improvement in Class II relationships, but a substantial proportion of the correction may arise from dentoalveolar adaptation rather than mandibular skeletal advancement alone.

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💬 Discussion
The Bionator technique remains a relevant option for selected growing patients with Class II malocclusion, particularly when mandibular retrusion is an important component of the sagittal discrepancy.
The available evidence supports its ability to improve overjet and molar relationships and to produce measurable skeletal effects during growth. Nevertheless, these effects should not be characterized as exclusively orthopedic. Comparative clinical studies and systematic reviews indicate that dentoalveolar changes are often a major, and sometimes predominant, contributor to Class II correction.
Current evidence also emphasizes the importance of treatment timing, patient cooperation, initial severity, and appliance design. Consequently, treatment planning should be based on the complete dentofacial diagnosis rather than on the assumption that mandibular advancement will produce a predictable amount of additional mandibular growth.

✍️ Conclusion
The Bionator technique is a removable functional approach primarily indicated for growing patients with selected Class II malocclusions. Its therapeutic effects involve a combination of skeletal, dentoalveolar, and soft-tissue adaptations.
Successful clinical application requires appropriate patient selection, individualized mandibular advancement, control of vertical and incisor effects, and adequate patient cooperation. The evidence supports its effectiveness for improving Class II relationships, while also indicating that the magnitude of skeletal correction is variable and should not be overestimated.

💡 Clinical Pearls
▪️ Select patients according to growth potential and skeletal diagnosis, not solely by overjet or molar relationship.
▪️ Individualize the construction bite according to sagittal and vertical objectives rather than applying a universal advancement value.
▪️ Monitor mandibular incisor inclination, because dentoalveolar compensation can contribute substantially to Class II correction.
▪️ Assess treatment response periodically and distinguish skeletal changes from dental compensation when evaluating progress.
▪️ Plan the subsequent orthodontic phase and retention from the beginning, particularly when early functional treatment is used as an initial stage of comprehensive treatment.

📚 References

✔ Almeida, M. R., Henriques, J. F. C., & Ursi, W. (2002). Comparative study of the Fränkel (FR-2) and bionator appliances in the treatment of Class II malocclusion. American Journal of Orthodontics and Dentofacial Orthopedics, 121(5), 458–466. https://doi.org/10.1067/mod.2002.123037
✔ Araujo, A. M., Buschang, P. H., & Melo, A. C. M. (2004). Adaptive condylar growth and mandibular remodelling changes with bionator therapy—an implant study. European Journal of Orthodontics, 26(5), 515–522. https://doi.org/10.1093/ejo/26.5.515
✔ Keeling, S. D., Wheeler, T. T., King, G. J., Garvan, C. W., & McGorray, S. (1998). Anteroposterior skeletal and dental changes after early Class II treatment with bionators and headgear. American Journal of Orthodontics and Dentofacial Orthopedics, 113(1), 40–50. https://doi.org/10.1016/S0889-5406(98)70275-6
✔ O'Brien, K., Wright, J., Conboy, F., Appelbe, P., Davies, L., Connolly, I., Houston, F., & Mandall, N. (2003). Early treatment for Class II Division 1 malocclusion with the Twin-block appliance: A multicenter, randomized, controlled trial. American Journal of Orthodontics and Dentofacial Orthopedics, 124(3), 234–243. [Reference included for broader functional-appliance evidence.]
✔ Santana, L. G., Avelar, K., Flores-Mir, C., & Marques, L. S. (2020). Incremental or maximal mandibular advancement in the treatment of class II malocclusion through functional appliances: A systematic review with meta-analysis. Orthodontics & Craniofacial Research, 23(4), 371–384. https://doi.org/10.1111/ocr.12388
✔ Vig, P. S., Orth, D., & Ellis, J. (2002). Effectiveness of early treatment of Class II malocclusion. American Journal of Orthodontics and Dentofacial Orthopedics, 121(1), 9–17. https://doi.org/10.1067/mod.2002.120159

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Orthodontic Treatment Time: Factors That Affect Duration

Orthodontic treatment duration varies substantially among patients and cannot be accurately predicted from appliance type alone.

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Comprehensive treatment with fixed appliances commonly extends over approximately 18–24 months, although individual treatment times may be considerably shorter or longer depending on the initial malocclusion, treatment objectives, biomechanics, and patient-related factors.

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A systematic review of prospective studies reported a mean duration of approximately 19.9 months for comprehensive fixed-appliance treatment, whereas another systematic review found a mean duration of approximately 24.9 months across a broader range of clinical trials. These differences illustrate the heterogeneity of orthodontic treatment protocols and patient populations.

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🔹 How Long Does Orthodontic Treatment Take?
For comprehensive treatment, a practical clinical estimate is often around 18–24 months, but this should be considered a general range rather than a fixed treatment time.
Treatment duration depends on the objectives of therapy. Limited alignment may require substantially less time, whereas comprehensive correction involving extractions, significant sagittal discrepancies, vertical problems, impacted teeth, or complex space management may require considerably longer treatment.

🔹 Factors That Influence Orthodontic Treatment Duration

Factor	Potential Effect on Treatment Time
Initial malocclusion severity	Greater discrepancy and tooth irregularity may require longer correction
Dental crowding	Increased irregularity can prolong alignment
Tooth extractions	Space closure and finishing may extend treatment
Impacted teeth	Surgical exposure and orthodontic traction can substantially increase duration
Skeletal discrepancies	Complex orthopedic or surgical approaches may require additional phases
Treatment mechanics	Anchorage requirements and biomechanics influence the sequence and rate of tooth movement
Patient compliance	Missed appointments, poor elastic wear, and appliance breakage can delay progress
Oral hygiene	Poor hygiene may require treatment interruptions or modifications
Treatment complications	Root resorption, periodontal problems, or unexpected tooth movement can alter the treatment plan
Clinician and treatment factors	Planning, biomechanics, monitoring, and clinical efficiency can affect treatment progression

1. Initial Malocclusion and Treatment Complexity
The severity and complexity of the initial malocclusion are among the most important determinants of treatment duration. Greater crowding, larger anteroposterior discrepancies, complex rotations, vertical problems, and extensive space requirements generally increase the number of movements required to achieve the treatment objectives.
Evidence from a systematic review of tooth alignment demonstrated that baseline irregularity significantly affects alignment time. In individual patient data analyses, each additional millimeter of initial irregularity was associated with approximately 17.5 additional days required for whole-arch mandibular alignment.

2. Extractions and Space Closure
Extraction-based orthodontic treatment may require additional time because the treatment must incorporate controlled space closure, root positioning, anchorage management, and final occlusal detailing.
Systematic-review evidence has identified extraction treatment as a factor associated with longer treatment duration, although the magnitude of the effect varies according to the malocclusion and mechanics used. Four-premolar extraction treatment has also been associated with increased treatment duration in clinical-trial evidence.

3. Impacted Teeth
Impacted teeth, particularly maxillary canines, can substantially prolong orthodontic treatment. Management may require surgical exposure, orthodontic traction, space creation, and subsequent alignment.
The presence of impacted maxillary canines has consistently been identified as a factor associated with increased treatment duration.

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4. Patient Compliance
Patient cooperation can directly influence treatment efficiency. Missed appointments, inadequate elastic wear, poor adherence to removable appliances, and repeated bracket or appliance failures can interrupt planned biomechanics.
Evidence concerning removable appliances demonstrates that actual wear time is frequently lower than prescribed, highlighting the importance of adherence when treatment depends on patient-controlled appliance use.

5. Age and Biological Response
Age is often considered a determinant of orthodontic treatment time; however, current evidence requires a more nuanced interpretation.
A systematic review comparing adolescents and adults found no significant difference in overall comprehensive fixed-appliance treatment duration between the groups. However, adult patients with palatally displaced canines required longer canine alignment in the available evidence. The certainty of these findings was limited by substantial heterogeneity and the predominantly non-randomized nature of the available studies.
Therefore, chronological age alone should not be used to predict treatment duration without considering the specific clinical situation.

6. Orthodontic Appliance and Technique
The assumption that one orthodontic appliance or bracket prescription consistently produces substantially shorter treatment is not strongly supported by current evidence.
Systematic reviews have found limited evidence for clinically important differences in treatment duration between different fixed-appliance prescriptions and techniques. More recent evidence also suggests that bracket slot size may have little or no clinically significant effect on overall treatment duration, although the certainty of evidence is low.
Similarly, evidence comparing clear aligners and fixed appliances in mild-to-moderate crowding has not demonstrated a consistent significant difference in treatment duration.

7. Treatment Interruptions and Clinical Complications
Unexpected events can extend treatment beyond the original estimate. These include broken appliances, missed appointments, inadequate oral hygiene, periodontal complications, delayed eruption, unfavorable tooth movement, and the need to modify treatment mechanics.
Consequently, an initial treatment estimate should be regarded as a clinical projection rather than a guaranteed completion date.

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💬 Discussion
Orthodontic treatment duration is multifactorial. Although a comprehensive fixed-appliance treatment period of approximately 18–24 months is frequently encountered clinically, published systematic reviews demonstrate variability in mean duration depending on study design, patient characteristics, malocclusion severity, and treatment protocol.
The available evidence indicates that case complexity, initial irregularity, extraction requirements, impacted teeth, patient cooperation, and treatment interruptions can have meaningful effects on treatment time. In contrast, claims that a particular bracket system or prescription inherently produces substantially shorter treatment are not consistently supported by high-quality evidence.
Treatment planning should therefore prioritize the biological and mechanical requirements of the individual malocclusion rather than using appliance selection as the principal method for reducing treatment duration.

✍️ Conclusion
Orthodontic treatment time is determined by the interaction of biological, clinical, mechanical, and patient-related factors. Comprehensive treatment frequently requires approximately 18–24 months, but complex cases may require substantially longer periods.
Accurate treatment-time estimation should consider malocclusion severity, crowding, extractions, impacted teeth, treatment mechanics, compliance, and potential complications. Current evidence does not support assuming that a particular appliance system will automatically produce a shorter treatment period.

🎯 Clinical Recommendations
▪️ Establish a case-specific treatment-time range rather than promising a fixed completion date.
▪️ Identify factors likely to prolong treatment before appliance placement, particularly severe crowding, extractions, impacted teeth, and complex skeletal discrepancies.
▪️ Incorporate anticipated anchorage and space-closure requirements into the treatment estimate.
▪️ Monitor compliance, appliance integrity, and appointment attendance because preventable interruptions can accumulate over the course of treatment.
▪️ Reassess the projected completion date periodically when treatment response differs from the initial biomechanical plan.

📚 References

✔ Abbing, A., Koretsi, V., Eliades, T., & Papageorgiou, S. N. (2020). Duration of orthodontic treatment with fixed appliances in adolescents and adults: A systematic review with meta-analysis. Progress in Orthodontics, 21, 37. https://doi.org/10.1186/s40510-020-00334-4
✔ Papageorgiou, S. N., Höchli, D., & Eliades, T. (2017). Outcomes of comprehensive fixed appliance orthodontic treatment: A systematic review with meta-analysis and methodological overview. Korean Journal of Orthodontics, 47(6), 401–413. https://doi.org/10.4041/kjod.2017.47.6.401
✔ Papageorgiou, S. N., Koletsi, D., Iliadi, A., Peltomäki, T., & Eliades, T. (2017). Treatment effects of various prescriptions and techniques for fixed orthodontic appliances: A systematic review. European Journal of Orthodontics, 39(6), 599–610. https://doi.org/10.1093/ejo/cjx020
✔ Tsichlaki, A., Chin, S. Y., Pandis, N., & Fleming, P. S. (2016). How long does treatment with fixed orthodontic appliances last? A systematic review. American Journal of Orthodontics and Dentofacial Orthopedics, 149(3), 308–318. https://doi.org/10.1016/j.ajodo.2015.09.020
✔ Wazwaz, F., Seehra, J., Carpenter, G. H., Ireland, A. J., Papageorgiou, S. N., & Cobourne, M. T. (2022). Duration of tooth alignment with fixed appliances: A systematic review and meta-analysis. American Journal of Orthodontics and Dentofacial Orthopedics, 161(1), 20–36. https://doi.org/10.1016/j.ajodo.2021.06.016

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