TMD Signs and Symptoms: Key Clinical Findings

Temporomandibular disorders (TMDs) comprise a heterogeneous group of conditions affecting the temporomandibular joints (TMJs), masticatory muscles, and associated structures.

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Clinical manifestations vary according to the underlying disorder and may include jaw pain, joint sounds, restricted mandibular movement, muscle tenderness, and headache.

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Recognition of the characteristic signs and symptoms of TMD is important because joint sounds without pain are common and do not necessarily indicate disease. A diagnosis should therefore be based on the relationship between symptoms, clinical findings, and mandibular function rather than on isolated findings.

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✅ Common Signs and Symptoms of TMD
The clinical presentation of TMD can be broadly organized into pain-related symptoms, functional alterations, joint findings, and associated manifestations.

Clinical Feature	Typical Presentation	Clinical Significance
Jaw or TMJ pain	Pain in the preauricular region or jaw, often modified by chewing or mandibular movement	Important feature of pain-related TMD
Masticatory muscle pain	Tenderness or pain involving the masseter and/or temporalis muscles	May indicate myalgia or myofascial pain
Joint sounds	Clicking, popping, or crepitus during mandibular movement	Painful sounds are more clinically relevant; painless sounds are frequently physiological
Limited mandibular movement	Reduced mouth opening or restricted lateral/protrusive movements	May indicate functional impairment or intra-articular pathology
Jaw locking	Difficulty opening or closing the mouth normally	Requires assessment for intra-articular disorders
Headache	Headache, particularly in the temporal region, associated with jaw function or TMD pain	May occur as headache attributed to TMD
Facial or neck pain	Pain extending beyond the immediate TMJ or masticatory muscle region	May accompany broader orofacial pain presentations
Changes in occlusal sensation	Patient reports that the teeth no longer fit together normally	Should be documented but is not, by itself, diagnostic of TMD

1. Pain as a Key Clinical Feature
Pain is the most clinically important symptom in symptomatic TMD. It may originate from the TMJ, masticatory muscles, or both. Pain may be localized to the preauricular region, jaw, temple, face, or neck and may be modified by chewing, speaking, yawning, clenching, or other mandibular activities.
A clinically relevant finding is the reproduction of the patient's familiar pain during appropriate palpation or mandibular provocation. This principle is incorporated into the DC/TMD diagnostic approach and helps distinguish clinically meaningful pain from nonspecific tenderness.

2. Joint Sounds: Clicking, Popping, and Crepitus
TMJ sounds are common and should not automatically be interpreted as pathological. Clicking or popping in the absence of pain or functional impairment can occur in otherwise asymptomatic individuals and generally does not constitute an indication for treatment.
When joint sounds are accompanied by pain, locking, restricted movement, or functional limitation, further assessment is warranted. Crepitus may be associated with degenerative joint changes, although the clinical finding should be interpreted together with the patient's symptoms and examination.

3. Restricted Jaw Movement and Locking
Patients with TMD may demonstrate reduced mouth opening, altered mandibular movements, deviation or deflection during opening, or episodes of jaw locking.
Functional limitation is particularly relevant when it interferes with eating, speaking, yawning, or routine oral activities. A structured examination should assess mandibular range of motion and whether movement reproduces the patient's familiar pain. The updated brief DC/TMD approach was developed to simplify this type of assessment for routine clinical settings.

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4. Masticatory Muscle Findings
TMD may involve the masseter and temporalis muscles, producing localized or referred pain and tenderness. Muscle-related symptoms may become more evident during chewing or sustained mandibular activity.
Clinical examination should distinguish generalized tenderness from pain that is familiar to the patient and reproduced by standardized palpation or movement, because the latter has greater diagnostic relevance within validated TMD criteria.

5. Headache Associated With TMD
Headache may occur in patients with painful TMD. A headache attributed to TMD is characterized by a temporal headache that is modified by jaw movement, function, or parafunction and can be reproduced through appropriate temporalis palpation or mandibular provocation.
Therefore, the presence of headache alone should not be interpreted as evidence of TMD. The temporal relationship between headache and mandibular function is clinically important.

6. Associated Symptoms
Some patients report ear-related symptoms, facial discomfort, or neck pain in association with TMD. These manifestations are nonspecific and may occur in several other conditions. Consequently, they should be considered supportive clinical information rather than independent diagnostic criteria.
Similarly, a perceived change in the way the teeth contact each other may occur in some patients, but occlusal changes alone should not be used to establish a diagnosis of TMD.

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✅ Clinical Assessment of Suspected TMD
The clinical assessment should integrate the patient's history with a focused examination of the TMJs, masticatory muscles, and mandibular function.

Key elements include:
▪️ Pain history: location, duration, intensity, provoking factors, and functional modification.
▪️ Mandibular range of motion: opening, lateral excursions, and protrusion.
▪️ Pain provocation: identification of whether movement or palpation reproduces the patient's familiar pain.
▪️ Joint examination: assessment for clicking, popping, crepitus, locking, and movement abnormalities.
▪️ Muscle examination: evaluation of the masseter and temporalis muscles.
▪️ Associated symptoms: headache and other orofacial pain manifestations.
▪️ Differential diagnosis: consideration of dental, neurologic, otologic, musculoskeletal, and other causes of facial pain when clinically indicated.

The DC/TMD framework provides validated diagnostic criteria for common pain-related TMDs and selected intra-articular disorders. More recent work on the brief DC/TMD (bDC/TMD) seeks to facilitate practical implementation in general dental settings while preserving clinically relevant diagnostic information.

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💬 Discussion
The clinical presentation of temporomandibular disorders is heterogeneous, and no single sign is sufficient to establish the diagnosis in most cases. Pain associated with mandibular function, restricted movement, familiar pain reproduced during examination, and relevant joint or muscle findings provide greater diagnostic value than isolated joint sounds.
An important distinction is that TMD signs do not necessarily represent TMD disease. Painless clicking and popping are frequent findings in the general population, while symptomatic TMD requires correlation between clinical findings and the patient's functional complaints.
The current diagnostic approach also recognizes that TMDs comprise multiple disorders that may coexist. Consequently, clinical assessment should identify the predominant pain and functional phenotype rather than relying on a single structural finding.

✍️ Conclusion
TMD signs and symptoms commonly include jaw or masticatory muscle pain, painful joint sounds, restricted mandibular movement, locking, and headache associated with jaw function. However, painless TMJ sounds alone are not sufficient to diagnose a temporomandibular disorder.
Accurate clinical evaluation requires correlation of the patient's symptoms with mandibular function, pain provocation, joint examination, and masticatory muscle assessment. Structured diagnostic frameworks such as the DC/TMD and bDC/TMD can improve consistency and facilitate appropriate clinical evaluation.

🎯 Clinical Recommendations
1. Prioritize pain and functional limitation over isolated TMJ sounds when determining clinical significance.
2. Document whether mandibular movement or palpation reproduces the patient's familiar pain, rather than recording tenderness alone.
3. Evaluate range of motion and locking episodes when intra-articular dysfunction is suspected.
4. Treat painless clicking or popping as an isolated finding unless it is accompanied by clinically relevant pain or dysfunction.
5. Consider differential diagnoses when facial or jaw pain does not show a consistent relationship with mandibular function.
6. Use a structured diagnostic framework, such as DC/TMD or bDC/TMD, when a more systematic clinical assessment is required.

📚 References

✔ Schiffman, E., Ohrbach, R., Truelove, E., Look, J., Anderson, G., Goulet, J. P., List, T., Svensson, P., Gonzalez, Y., Lobbezoo, F., Michelotti, A., Brooks, S. L., Ceusters, W., Drangsholt, M., Ettlin, D., Gaul, C., Goldberg, L. J., Haythornthwaite, J. A., Hollender, L., ... Dworkin, S. F. (2014). Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) for clinical and research applications: Recommendations of the International RDC/TMD Consortium Network and Orofacial Pain Special Interest Group. Journal of Oral & Facial Pain and Headache, 28(1), 6–27. https://doi.org/10.11607/jop.1151
✔ Durham, J., Ohrbach, R., Baad-Hansen, L., Davies, S., De Laat, A., Goncalves, D. G., Gordan, V. V., Goulet, J. P., Häggman-Henrikson, B., Horton, M., Koutris, M., Law, A., List, T., Lobbezoo, F., Michelotti, A., Nixdorf, D. R., Oyarzo, J. F., Peck, C., Penlington, C., ... Alstergren, P. (2024). Constructing the brief diagnostic criteria for temporomandibular disorders (bDC/TMD) for field testing. Journal of Oral Rehabilitation, 51(5), 785–794. https://doi.org/10.1111/joor.13652
✔ Schiffman, E., Ohrbach, R., List, T., Anderson, G., Jensen, R., John, M. T., Nixdorf, D., Goulet, J. P., Kang, W., Truelove, E., Clavel, A., Fricton, J., & Look, J. (2012). Diagnostic criteria for headache attributed to temporomandibular disorders. Cephalalgia, 32(9), 683–692. https://doi.org/10.1177/0333102412446312
✔ National Institute of Dental and Craniofacial Research. (2025). TMD (temporomandibular disorders). National Institutes of Health.
✔ Peck, C. C., Goulet, J. P., Lobbezoo, F., Schiffman, E. L., Alstergren, P., Anderson, G. C., de Leeuw, R., Jensen, R., Michelotti, A., Ohrbach, R., Petersson, A., & List, T. (2014). Expanding the taxonomy of the diagnostic criteria for temporomandibular disorders. Journal of Oral Rehabilitation, 41(1), 2–23. https://doi.org/10.1111/joor.12132

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Emergency Pediatric Dentistry: Clinical Cases and Tips

Emergency pediatric dentistry involves the rapid assessment and management of acute oral conditions that may cause significant pain, infection, bleeding, functional impairment, or damage to developing permanent teeth.

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Common presentations include dental trauma, odontogenic infection, acute dental pain, soft-tissue injuries, and dental avulsion.

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Emergency management in children requires more than treating the immediate dental problem. Age, dentition stage, medical history, cooperation, risk of complications, and potential effects on the developing permanent dentition must be considered.
The AAPD identifies facial swelling, infection, uncontrolled bleeding, severe pain, and orofacial trauma among important pediatric dental emergencies.

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✅ Initial Assessment of a Pediatric Dental Emergency
The initial examination should rapidly determine whether the condition is primarily dental, traumatic, infectious, or medical.

A structured assessment includes:
▪️ General appearance and level of distress
▪️ Airway, breathing, and circulation when significant trauma or swelling is present
▪️ Mechanism and timing of injury
▪️ Pain characteristics and duration
▪️ Medical history and current medications
▪️ Extraoral and intraoral examination
▪️ Tooth mobility, displacement, fracture, or avulsion
▪️ Soft-tissue injuries
▪️ Radiographic assessment when indicated

Airway compromise, uncontrolled hemorrhage, rapidly progressing facial swelling, altered consciousness, or major facial trauma require immediate medical evaluation and appropriate emergency referral.

✅ Common Emergency Clinical Cases
The following cases represent frequent situations encountered in pediatric dental practice.

Clinical Case	Key Findings	Immediate Management
Acute dental pain	Spontaneous pain, sensitivity, or pain associated with pulpal/periapical disease	Establish diagnosis, provide definitive dental treatment when possible, and control pain
Localized odontogenic infection	Pain with localized swelling, abscess, or draining sinus	Eliminate the source through appropriate dental treatment or extraction; antibiotics are not routinely required without systemic involvement
Facial swelling	Diffuse or progressive swelling, fever, malaise, or cellulitis	Urgent assessment; establish drainage/source control and consider systemic antibiotics when indicated
Tooth fracture	Enamel, dentin, or pulp exposure following trauma	Assess pulp and supporting tissues; protect exposed tissues and manage according to fracture type
Luxation injury	Abnormal tooth mobility or displacement	Assess occlusion, mobility, displacement, and adjacent structures; follow trauma-specific guidelines
Avulsed permanent tooth	Complete displacement of a permanent tooth from its socket	Time-sensitive emergency requiring immediate management according to IADT recommendations
Soft-tissue injury	Laceration, puncture wound, or gingival injury	Control bleeding, evaluate foreign bodies and associated dental trauma, and determine need for medical referral

✅ Clinical Case 1: Acute Dental Pain
Acute dental pain may result from pulpal inflammation, apical disease, trauma, or postoperative complications. Emergency management should focus on establishing the diagnosis and addressing the underlying cause rather than relying exclusively on analgesics.
For pharmacologic pain control, current AAPD recommendations identify acetaminophen and NSAIDs as first-line medications for pediatric dental pain, with treatment individualized according to age, weight, medical history, contraindications, and the expected severity of pain.
Definitive dental treatment should be performed as soon as clinically feasible.

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✅ Clinical Case 2: Odontogenic Infection and Facial Swelling
A localized dental infection requires source control, which may involve pulpal treatment, drainage, or extraction depending on the tooth and clinical diagnosis.
Antibiotics should not substitute for definitive dental treatment. The AAPD recommends judicious antibiotic use and distinguishes localized dental conditions from infections associated with systemic involvement or progressive facial swelling. Antibiotics are not indicated for conditions of viral origin.
Fever, malaise, rapidly progressive swelling, facial cellulitis, trismus, dysphagia, or signs suggesting airway compromise require urgent escalation of care.

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✅ Clinical Case 3: Dental Trauma
Traumatic dental injuries are particularly important in children because injuries to primary teeth can affect the developing permanent successors.
Assessment should include:
▪️ Tooth displacement or mobility
▪️ Crown and root fractures
▪️ Pulp exposure
▪️ Occlusal changes
▪️ Alveolar or supporting-tissue injury
▪️ Soft-tissue wounds
▪️ Possible intrusion or extrusion
▪️ Stage of dental development
Management differs substantially between primary and permanent teeth. The IADT 2020 guidelines provide separate recommendations for fractures and luxations, avulsion of permanent teeth, and injuries to the primary dentition.

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✅ Clinical Case 4: Avulsion of a Permanent Tooth
Avulsion of a permanent tooth is a time-sensitive dental emergency. The treatment objective is to preserve periodontal ligament viability and reduce complications associated with delayed management.
When an avulsed permanent tooth is identified, the clinician should determine:
1. Extraoral dry time.
2. Storage medium used.
3. Stage of root development.
4. Condition of the tooth and socket.
5. Associated soft-tissue or alveolar injuries.
The IADT recommends immediate, protocol-based management and emphasizes that treatment differs according to extraoral dry time and other clinical factors.
Primary teeth should not be replanted, because management must consider the risk of injury to the developing permanent successor.

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✅ Clinical Case 5: Soft-Tissue Injuries
Lip, cheek, and gingival injuries may accompany dental trauma. Examination should determine whether a fragment of tooth or another foreign body is embedded within the soft tissue.
Management may include:
▪️ Hemorrhage control
▪️ Irrigation and wound cleaning
▪️ Removal of foreign material when indicated
▪️ Evaluation for associated dental or alveolar injury
▪️ Suturing when clinically necessary
▪️ Appropriate follow-up
A soft-tissue injury should therefore not be evaluated independently of the teeth and supporting structures when trauma is involved.

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✅ Pain and Anxiety Management
Effective pediatric emergency care requires simultaneous management of pain and anxiety. AAPD recommendations emphasize comprehensive pain assessment, profound local anesthesia for invasive procedures, nonpharmacologic approaches such as distraction, and appropriate pharmacologic analgesia.
When sedation is necessary, patient selection, medical evaluation, monitoring, personnel qualifications, equipment, and recovery requirements must follow established pediatric sedation standards.

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💬 Discussion
Pediatric dental emergencies require rapid triage, accurate diagnosis, and treatment directed toward the underlying condition. The immediate priority is to distinguish conditions that can be managed in the dental setting from those requiring urgent medical or hospital referral.
Dental trauma represents a particularly important component because management depends on dentition type and injury classification. Primary and permanent teeth should not be managed using identical protocols. The IADT guidelines specifically emphasize this distinction.
Similarly, antibiotic prescribing should be based on the clinical diagnosis rather than the presence of dental pain alone. Source control remains fundamental in odontogenic infection, while systemic therapy is reserved for appropriate clinical indications.

💡 Clinical Pearls
▪️ Triage before treatment: exclude airway compromise, uncontrolled bleeding, major facial trauma, and systemic deterioration before focusing on the tooth.
▪️ Identify the dentition: trauma management differs fundamentally between primary and permanent teeth.
▪️ Control the cause, not only the symptoms: analgesics and antibiotics should not replace definitive management of dental disease.
▪️ Treat avulsion as time-sensitive: document extraoral dry time and storage conditions immediately.
▪️ Search soft tissues after dental trauma: tooth fragments and foreign bodies may be clinically occult.
▪️ Document baseline findings carefully: photographs, tooth position, mobility, occlusion, radiographs, and treatment timing facilitate follow-up.
▪️ Arrange follow-up: many traumatic injuries require monitoring for pulpal, periodontal, developmental, or other sequelae.

✍️ Conclusion
Emergency pediatric dentistry requires structured triage, diagnosis, pain control, and definitive management. The most important clinical principles are early recognition of potentially serious infection or trauma, differentiation between primary and permanent dentition, timely management of avulsed permanent teeth, and judicious use of analgesics and antibiotics.
A standardized emergency protocol can improve clinical decision-making while reducing delays in treatment and unnecessary pharmacologic intervention.

📚 References

✔ American Academy of Pediatric Dentistry. (2026). Policy on emergency oral care. In The Reference Manual of Pediatric Dentistry. American Academy of Pediatric Dentistry.
✔ American Academy of Pediatric Dentistry. (2026). Acute pain management for pediatric dental patients. In The Reference Manual of Pediatric Dentistry. American Academy of Pediatric Dentistry.
✔ American Academy of Pediatric Dentistry. (2026). Use of antibiotic therapy for pediatric dental patients. In The Reference Manual of Pediatric Dentistry. American Academy of Pediatric Dentistry.
✔ Bourguignon, C., Cohenca, N., Lauridsen, E., Flores, M. T., O'Connell, A. C., Day, P. F., Tsilingaridis, G., Abbott, P. V., & Levin, L. (2020). International Association of Dental Traumatology guidelines for the management of traumatic dental injuries: 1. Fractures and luxations. Dental Traumatology, 36(4), 314–330. https://doi.org/10.1111/edt.12578
✔ Fouad, A. F., Abbott, P. V., Tsilingaridis, G., Cohenca, N., Lauridsen, E., Bourguignon, C., O'Connell, A., Flores, M. T., Day, P. F., Hicks, L., Andreasen, J. O., Cvek, M., Harlamb, S., Kahler, B., Oginni, A., Semper, M., & Levin, L. (2020). International Association of Dental Traumatology guidelines for the management of traumatic dental injuries: 2. Avulsion of permanent teeth. Dental Traumatology, 36(4), 331–342. https://doi.org/10.1111/edt.12573
✔ Day, P. F., Flores, M. T., O'Connell, A. C., Abbott, P. V., Tsilingaridis, G., Fouad, A. F., Levin, L., Bourguignon, C., Hicks, L., Andreasen, J. O., Cehreli, Z. C., Harlamb, S., Kahler, B., Oginni, A., Semper, M., & Cohenca, N. (2020). International Association of Dental Traumatology guidelines for the management of traumatic dental injuries: 3. Injuries in the primary dentition. Dental Traumatology, 36(4), 343–359. https://doi.org/10.1111/edt.12576
✔ American Academy of Pediatric Dentistry. (2025). Guidelines for monitoring and management of pediatric patients before, during, and after sedation for diagnostic and therapeutic procedures. Pediatric Dentistry, 47(6), E100–E128.

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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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Valsalva Maneuver in Dentistry: Clinical Guide

The Valsalva maneuver is a forced expiratory effort performed against a closed airway that produces transient increases in intrathoracic and intranasal pressure.

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Although widely used in cardiovascular and autonomic testing, the maneuver also has a specific role in oral and maxillofacial diagnosis, particularly when an oroantral communication (OAC) is suspected after procedures involving the posterior maxilla.

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In dentistry, the maneuver can help identify an abnormal connection between the oral cavity and the maxillary sinus by demonstrating air movement through the suspected communication. However, it should be regarded as a clinical adjunct rather than a definitive diagnostic test.

✅ What Is the Valsalva Maneuver?
The conventional Valsalva maneuver consists of attempting to exhale forcefully while the airway is closed. This increases intrathoracic pressure and produces predictable cardiovascular and respiratory responses. The magnitude of these responses varies according to the duration and intensity of straining, body position, lung volume, and breathing pattern.
In oral surgery, a modified and gentle form of the maneuver may be used to assess suspected communication between the oral cavity and maxillary sinus.

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✅ Valsalva Maneuver for Oroantral Communication
An oroantral communication is an abnormal connection between the oral cavity and maxillary sinus, most commonly associated with extraction of posterior maxillary teeth because of their anatomical proximity to the sinus floor. Implant surgery, sinus augmentation, trauma, and other maxillary procedures can also produce this complication.
During the clinical examination, increased pressure within the nasal and sinus cavities may cause air to pass through an OAC and emerge into the oral cavity. Clinically, this may appear as air bubbles, bleeding, fluid movement, or an audible air leak at the extraction socket or suspected communication.

Clinical Technique
The maneuver should be performed gently and only when clinically indicated:
1. Position the patient comfortably, preferably upright.
2. Keep the patient's mouth open.
3. Ask the patient to close the nostrils gently.
4. Instruct the patient to attempt a gentle exhalation against the closed nasal passages.
5. Observe the extraction socket or suspected communication for air bubbles, movement of blood or secretions, or an audible air leak.
6. Stop the maneuver immediately after obtaining a clinically meaningful response.

The objective is to generate sufficient pressure to identify air passage without producing excessive pressure within the maxillary sinus.

✅ Interpretation of the Test

Finding	Possible Interpretation
Air bubbles at the socket	Suggestive of oroantral communication
Air or blood movement through the opening	Supports the presence of communication
Audible air leakage	May indicate an oroantral defect
No detectable air movement	Does not reliably exclude a small communication
Persistent sinus-related symptoms	Requires additional clinical and radiographic evaluation

A positive response supports the clinical diagnosis, but a negative Valsalva test cannot exclude an OAC, particularly when the communication is small or partially obstructed by tissue or inflammatory material.

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✅ Diagnostic Limitations
The Valsalva maneuver should not be considered a standalone diagnostic procedure. Small communications may produce no visible clinical response, resulting in false-negative findings. Recent literature has specifically highlighted the limited sensitivity of the post-extraction Valsalva test for small OACs.
When clinical suspicion persists, additional evaluation may include periapical or panoramic radiography, while cone-beam computed tomography (CBCT) can provide three-dimensional information about the defect and the condition of the maxillary sinus.

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✅ Important Clinical Precautions
The maneuver should be performed with minimal and controlled pressure. Excessive pressure may theoretically enlarge a fresh communication or promote the displacement of oral contaminants toward the maxillary sinus. Contemporary clinical literature therefore recommends caution when using the test.
Routine aggressive probing of a suspected communication is also undesirable because instrumentation can traumatize the sinus membrane or introduce bacteria and foreign material into the sinus.

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🎯 Clinical Recommendations
▪️ Use the Valsalva maneuver as an adjunct, not as the sole method for diagnosing an oroantral communication.
▪️ Perform it gently and briefly, particularly immediately after extraction.
▪️ If clinical suspicion remains despite a negative result, consider appropriate radiographic or CBCT evaluation.
▪️ Avoid forceful pressure and unnecessary probing of a fresh extraction socket.
▪️ Document the clinical findings and evaluate the patient for symptoms or signs of maxillary sinus involvement.

💬 Discussion
The Valsalva maneuver remains a simple chairside method for detecting clinically apparent oroantral communication, particularly following posterior maxillary extraction. Its principal advantage is its immediate availability and ability to demonstrate air passage through a communication without specialized equipment.
Its principal limitation is diagnostic sensitivity. A negative test does not exclude a small defect, and excessive pressure may be undesirable in a recently created communication. Therefore, the maneuver should form part of a broader diagnostic assessment that incorporates the surgical history, intraoral findings, symptoms, and appropriate imaging.

✍️ Conclusion
The Valsalva maneuver in dentistry is a useful clinical adjunct for detecting suspected oroantral communication, particularly after posterior maxillary procedures. A positive finding can provide immediate evidence of communication, whereas a negative result does not reliably exclude a small defect. Careful technique, minimal pressure, and appropriate radiographic assessment when indicated are essential for safe and accurate clinical decision-making.

📚 References

✔ Arslanoglou, N. M., Plakogiannaki, E., Stergiou, T., Kafas, P., Lillis, T., & Dabarakis, N. (2026). Post-extraction false-negative Valsalva test in oroantral communications: Diagnostic challenges and clinical implications. European Journal of Dental and Oral Health, 7(4), 6–13. https://doi.org/10.24018/ejdent.2026.7.4.70550
✔ Khandelwal, P., & Hajira, N. (2017). Management of oro-antral communication and fistula: Various surgical options. World Journal of Plastic Surgery, 6(1), 3–8.
✔ Parvini, P., Obreja, K., Begic, A., Schwarz, F., Becker, J., & Sader, R. (2019). Decision-making in closure of oroantral communication and fistula. International Journal of Implant Dentistry, 5, 13. https://doi.org/10.1186/s40729-019-0165-7
✔ Pstras, L., Thomaseth, K., Waniewski, J., Balzani, I., & Bellavere, F. (2016). The Valsalva manoeuvre: Physiology and clinical examples. Acta Physiologica, 217(2), 103–119. https://doi.org/10.1111/apha.12639
✔ Visscher, S. H., van Minnen, B., & Bos, R. R. M. (2010). Closure of oroantral communications: A review of the literature. Journal of Oral and Maxillofacial Surgery, 68(6), 1384–1391. https://doi.org/10.1016/j.joms.2009.07.026

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Peri-Implantitis: Clinical and Radiographic Features

Peri-implantitis is a plaque-associated inflammatory disease affecting the tissues surrounding a dental implant and characterized by inflammation of the peri-implant mucosa accompanied by progressive loss of supporting bone.

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Unlike peri-implant mucositis, peri-implantitis involves radiographically detectable bone loss beyond the initial remodeling phase.

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Early identification depends on combining clinical examination, peri-implant probing, bleeding assessment, and standardized radiographic evaluation. No single clinical finding is sufficient to establish the diagnosis.

✅ Clinical Features of Peri-Implantitis
The clinical presentation is characterized primarily by signs of peri-implant inflammation and progressive changes in peri-implant tissue dimensions.

The principal findings include:
▪️ Bleeding on probing (BOP): A frequent indicator of peri-implant inflammation. Bleeding occurring shortly after gentle probing is particularly relevant.
▪️ Suppuration: May be present and indicates an inflammatory lesion, although its absence does not exclude peri-implantitis.
▪️ Increased probing depth (PD): Increasing PD compared with measurements obtained after prosthetic reconstruction is an important diagnostic finding.
▪️ Mucosal swelling and erythema: Reflect soft-tissue inflammation around the implant.
▪️ Mucosal recession: May expose the implant surface and contribute to an increased measured probing depth.
▪️ Progressive loss of peri-implant support: Represents the fundamental pathological component distinguishing peri-implantitis from peri-implant mucositis.
▪️ Implant mobility: Generally represents advanced loss of osseointegration rather than an early diagnostic feature and should be distinguished from mobility caused by prosthetic or mechanical complications.

The 2017 World Workshop consensus describes peri-implantitis sites as exhibiting inflammation, bleeding and/or suppuration, increased probing depths and/or mucosal recession, together with radiographic bone loss.

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✅ Clinical Diagnostic Criteria

Clinical Finding	Typical Finding	Diagnostic Significance
Bleeding on probing	Bleeding after gentle probing	Indicates peri-implant inflammation
Suppuration	Purulent exudate on probing	Supports the presence of active inflammation
Increased probing depth	Increase compared with baseline	Important indicator of disease progression
Erythema and swelling	Inflamed peri-implant mucosa	Supports peri-implant inflammation
Mucosal recession	Apical displacement of the mucosal margin	May accompany tissue breakdown and increase probing depth

✅ Radiographic Features of Peri-Implantitis
Radiographic assessment is essential because peri-implantitis is defined partly by progressive loss of supporting bone. The most important radiographic parameter is the change in marginal peri-implant bone level relative to an appropriate baseline examination.

1. Progressive Marginal Bone Loss
The principal radiographic feature is bone loss around the implant beyond the expected initial remodeling.
A baseline radiograph obtained after completion of the implant-supported prosthesis provides an important reference for subsequent comparisons. When previous radiographs are unavailable, the 2018 diagnostic consensus proposed that a radiographic bone level ≥3 mm, combined with BOP and probing depth ≥6 mm, is indicative of peri-implantitis.

2. Vertical and Horizontal Bone Loss
Radiographic bone destruction may present as:
▪️ Horizontal or crestal bone loss
▪️ Vertical/intrabony defects
▪️ Circumferential bone defects
Peri-implantitis lesions may have complex three-dimensional configurations that are not completely represented by conventional two-dimensional imaging.

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3. Progressive Changes on Serial Radiographs
Comparison of standardized radiographs over time is particularly valuable. Reproducible imaging geometry facilitates detection of relatively small changes in the peri-implant bone contour and level. Current radiological reviews continue to consider intraoral radiography the standard approach for routine assessment and follow-up, while CBCT is reserved for selected clinical situations.

4. CBCT Findings
Cone-beam computed tomography (CBCT) can provide additional information about the three-dimensional morphology of peri-implant defects, particularly buccal and lingual bone dimensions that may be poorly represented on periapical radiographs.
However, CBCT should not be considered a routine replacement for intraoral radiography. Metallic artifacts can obscure peri-implant structures, and the additional radiation exposure must be justified by the diagnostic question.

✅ Clinical and Radiographic Correlation

Parameter	Peri-Implant Mucositis	Peri-Implantitis
Inflammation	Present	Present
Bleeding on probing	Usually present	Usually present
Probing depth	May increase because of inflammation	Increased compared with baseline or associated with bone loss
Radiographic bone loss	Absent beyond initial remodeling	Present and progressive
Supporting bone loss	No disease-related loss	Characteristic feature

✅ Differential Diagnostic Considerations
Radiographic bone loss around an implant should not automatically be interpreted as peri-implantitis. The clinician should consider:

▪️ Initial physiological bone remodeling
▪️ Peri-implant mucositis without progressive bone loss
▪️ Mechanical complications
▪️ Implant malposition
▪️ Excessive restorative contour or plaque-retentive prosthetic design
▪️ Endodontic lesions associated with adjacent teeth
▪️ Periapical implant lesions
▪️ Occlusal or prosthetic complications

Consequently, diagnosis requires clinical–radiographic correlation, rather than interpretation of an isolated radiographic finding.

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💬 Discussion
The diagnosis of peri-implantitis is fundamentally longitudinal. The most informative assessment combines inflammation, probing findings, and changes in radiographic bone level over time. The absence of a baseline radiograph makes diagnosis more difficult, which is why baseline probing and radiographic measurements after completion of the implant-supported prosthesis are recommended.
Current evidence also supports the continued use of standardized intraoral radiographs for routine monitoring. CBCT offers valuable three-dimensional information when the morphology or extent of a peri-implant defect cannot be adequately characterized with conventional imaging, but its routine use is not supported.
Emerging technologies, including artificial intelligence applied to radiographic images, may improve detection and quantification of peri-implant bone loss. However, current AI evidence is predominantly retrospective and internally validated, with substantial methodological limitations; these technologies should therefore be considered adjunctive rather than established diagnostic standards.

✍️ Conclusion
Peri-implantitis is characterized by peri-implant inflammation combined with progressive loss of supporting bone. The principal clinical findings are bleeding on probing, increased probing depth, suppuration, mucosal inflammation, and, in some cases, recession. The principal radiographic finding is bone loss beyond the initial remodeling phase.
Accurate diagnosis requires standardized clinical and radiographic assessment, preferably supported by baseline records. Intraoral radiography remains central to routine monitoring, whereas CBCT should be used selectively when three-dimensional information is clinically necessary.

🎯 Clinical Recommendations
▪️ Establish baseline probing depths and standardized intraoral radiographs after completion of the implant-supported prosthesis.
▪️ Compare subsequent examinations with baseline measurements rather than relying exclusively on absolute probing-depth values.
▪️ Interpret bleeding on probing together with radiographic bone changes; neither finding should be considered in isolation.
▪️ When previous radiographs are unavailable, use the established diagnostic combination of bone level ≥3 mm, probing depth ≥6 mm, and bleeding on probing as a clinical reference.
▪️ Reserve CBCT for cases in which conventional radiography does not adequately characterize the suspected defect, particularly when three-dimensional morphology will influence diagnosis or treatment planning.
▪️ Distinguish disease-associated bone loss from initial remodeling, mechanical complications, and other peri-implant or adjacent-tooth pathology.
▪️ Document clinical and radiographic findings longitudinally to identify progressive disease as early as possible.

📚 References

✔ Berglundh, T., Armitage, G., Araujo, M. G., Avila-Ortiz, G., Blanco, J., Camargo, P. M., Chen, S., Cochran, D., Derks, J., Figuero, E., Hämmerle, C. H. F., Heitz-Mayfield, L. J. A., Huynh-Ba, G., Iacono, V., Koo, K.-T., Lambert, F., McCauley, L., Quirynen, M., Renvert, S., Salvi, G. E., Schwarz, F., Tarnow, D., Tomasi, C., Wang, H.-L., & Zitzmann, N. (2018). Peri-implant diseases and conditions: Consensus report of workgroup 4 of the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions. Journal of Clinical Periodontology, 45(Suppl. 20), S286–S291. https://doi.org/10.1111/jcpe.12957
✔ Renvert, S., Hirooka, H., Polyzois, I., Kelekis-Cholakis, A., Wang, H.-L., & Working Group 3. (2018). Diagnosis and non-surgical treatment of peri-implant diseases and maintenance care of patients with dental implants: Consensus report of working group 3. Journal of Clinical Periodontology, 45(Suppl. 20), S313–S318. https://doi.org/10.1111/jcpe.12957
✔ Heitz-Mayfield, L. J. A., Salvi, G. E., Mombelli, A., Faddy, M., & Lang, N. P. (2018). Peri-implant mucositis and peri-implantitis: Case definitions and diagnostic considerations. Journal of Clinical Periodontology, 45(Suppl. 20), S246–S252. https://doi.org/10.1111/jcpe.12956
✔ Schwarz, F., Derks, J., Monje, A., & Wang, H.-L. (2018). Peri-implantitis. Journal of Clinical Periodontology, 45(Suppl. 20), S246–S266. https://doi.org/10.1111/jcpe.12954
✔ Wismeijer, D., et al. (2024). Radiographic assessment of the peri-implant site. Periodontology 2000. https://doi.org/10.1111/prd.12577
✔ Jacobs, R., Vranckx, M., Vanderstuyft, T., Quirynen, M., & Salmon, B. (2018). CBCT vs other imaging modalities to assess peri-implant bone and diagnose complications: A systematic review. European Journal of Oral Implantology, 11(Suppl. 1), 77–92.
✔ Herrera, D., Berglundh, T., Schwarz, F., Chapple, I., Jepsen, S., Sculean, A., Kebschull, M., Papapanou, P. N., Tonetti, M. S., & Sanz, M. (2023). Prevention and treatment of peri-implant diseases—The EFP S3 level clinical practice guideline. Journal of Clinical Periodontology, 50(Suppl. 26), 4–76. https://doi.org/10.1111/jcpe.13823

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