Ribbond® Fiber: Uses, Benefits & Clinical Applications

Ribbond is a high-strength polyethylene fiber reinforcement material widely used in restorative and prosthetic dentistry.

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It helps strengthen composite restorations, reduce fracture risk, and provide conservative treatment alternatives. Because it is flexible, biocompatible, and esthetic, Ribbond has become an important option for both direct and indirect dental procedures.

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This guide summarizes the essential clinical information every dental student and practitioner should know.

✅ Introduction
Modern restorative dentistry aims to preserve as much healthy tooth structure as possible while providing durable restorations. Fiber-reinforced composite (FRC) technology has significantly improved the mechanical performance of composite materials.
Among these materials, Ribbond is one of the most recognized reinforcement fibers due to its unique woven polyethylene structure, which distributes functional forces more evenly and helps prevent crack propagation.

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✅ What Is Ribbond?
Ribbond is a leno-woven ultra-high molecular weight polyethylene (UHMWPE) fiber specifically developed for dental reinforcement.

Unlike rigid metal reinforcement, Ribbond is:
▪️ Flexible
▪️ Lightweight
▪️ Tooth-colored
▪️ Biocompatible
▪️ Compatible with adhesive dentistry
Its woven architecture allows forces to spread over a larger area, reducing stress concentration within composite restorations.

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✅ What Is Ribbond Made Of?
Ribbond is manufactured from:

▪️ Ultra-high molecular weight polyethylene (UHMWPE) fibers
▪️ Leno-weave architecture
▪️ Plasma-treated fiber surface that improves bonding with adhesive resins
This combination provides excellent toughness while maintaining flexibility.

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✅ Main Clinical Uses

1. Reinforcement of Composite Restorations
One of the most common applications is reinforcing large composite restorations in posterior teeth.
Benefits include:
▪️ Reduced fracture risk
▪️ Improved load distribution
▪️ Increased restoration longevity

2. Periodontal Splinting
Ribbond is frequently used to splint mobile teeth caused by periodontal disease or trauma.
Advantages:
▪️ Conservative treatment
▪️ Excellent esthetics
▪️ Comfortable for patients
▪️ Easy repair if necessary

3. Fiber-Reinforced Bridges
It can be used to fabricate:
▪️ Temporary bridges
▪️ Semi-permanent bridges
▪️ Minimally invasive adhesive bridges
Often requiring little or no tooth preparation.

4. Endodontic Applications
Ribbond may reinforce teeth with extensive structural loss after endodontic treatment, especially when preserving remaining tooth tissue is preferred.

5. Orthodontic Retainers
Some clinicians use Ribbond as a bonded lingual retainer because it is:
▪️ Metal-free
▪️ Esthetic
▪️ Comfortable

6. Trauma Management
Ribbond is useful for:
▪️ Stabilizing luxated teeth
▪️ Splinting avulsed teeth after replantation
▪️ Emergency trauma treatment

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✅ Advantages of Ribbond
Major advantages include:

▪️ Excellent fracture resistance
▪️ High tensile strength
▪️ Conservative treatment approach
▪️ Superior esthetics
▪️ Metal-free restoration
▪️ Biocompatibility
▪️ Flexibility without permanent deformation
▪️ Good stress distribution
▪️ Easy repair using composite resin
▪️ Compatible with adhesive techniques

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✅ Disadvantages
Although highly effective, Ribbond has limitations:

▪️ Technique-sensitive placement
▪️ Requires proper adhesive protocol
▪️ Higher cost than conventional reinforcement methods
▪️ Moisture contamination may reduce bond quality
▪️ Incorrect fiber positioning decreases effectiveness

✅ Clinical Benefits

Clinical Benefit	Effect
Fracture resistance	Increased
Stress distribution	Improved
Crack propagation	Reduced
Restoration longevity	Increased
Tooth preservation	Better
Esthetics	Excellent

✅ Indications
Ribbond is indicated for:

▪️ Large posterior restorations
▪️ Fractured cusps
▪️ Direct composite bridges
▪️ Periodontal splints
▪️ Trauma splints
▪️ Orthodontic retainers
▪️ Reinforcement of weakened teeth
▪️ Conservative adhesive restorations

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✅ Contraindications
Its use may not be appropriate when:

▪️ Adequate isolation cannot be achieved
▪️ Severe occlusal overload exists
▪️ Extensive structural loss requires full-coverage restoration
▪️ The operator lacks familiarity with adhesive protocols

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✅ Basic Clinical Protocol
Although the protocol varies depending on the indication, the general workflow includes:

1. Tooth preparation.
2. Acid etching (when indicated).
3. Adhesive application.
4. Placement of flowable or restorative composite.
5. Adaptation of Ribbond into the uncured resin.
6. Light curing.
7. Final composite coverage.
8. Finishing and polishing.
Proper fiber adaptation is essential for optimal reinforcement.

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✅ Clinical Tips
▪️ Keep the fiber completely embedded within composite resin.
▪️ Avoid contamination during bonding procedures.
▪️ Do not leave exposed fibers.
▪️ Follow manufacturer instructions carefully.
▪️ Check occlusion after finishing.

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💬 Discussion
Current evidence supports Ribbond as an effective reinforcement material for multiple conservative dental procedures. Its woven UHMWPE structure improves fracture resistance by reducing crack propagation and distributing functional loads more evenly.
However, clinical success depends more on proper case selection and adhesive technique than on the material itself. Ribbond should not replace sound restorative principles but rather complement them when additional reinforcement is needed.

✍️ Conclusion
Ribbond is one of the most versatile fiber reinforcement materials available in modern dentistry. Its combination of high strength, flexibility, esthetics, and minimally invasive application makes it valuable for restorative, prosthetic, periodontal, orthodontic, and trauma management procedures.
When used with proper adhesive protocols, it can improve restoration longevity while preserving healthy tooth structure.

🎯 Clinical Recommendations
▪️ Use Ribbond when reinforcement is needed without excessive tooth preparation.
▪️ Maintain strict moisture control during bonding.
▪️ Completely cover the fiber with composite resin.
▪️ Follow evidence-based adhesive protocols.
▪️ Evaluate occlusion carefully to minimize excessive functional stress.

📚 References

✔ Freilich, M. A., Meiers, J. C., & Duncan, J. P. (2000). Fiber-Reinforced Composites in Clinical Dentistry. Quintessence Publishing Co.
✔ Goldberg, A. J., & Burstone, C. J. (1992). The use of continuous fiber reinforcement in dentistry. Dental Materials, 8(3), 197–202.
✔ Kumbuloglu, O., Lassila, L. V. J., User, A., & Vallittu, P. K. (2008). A review of fiber-reinforced composites in clinical dentistry. The Open Dentistry Journal, 2, 11–16.
✔ Vallittu, P. K. (1999). Flexural properties of acrylic resin polymers reinforced with unidirectional and woven glass fibers. The Journal of Prosthetic Dentistry, 81(3), 318–326.
✔ Vallittu, P. K. (2018). Fiber-reinforced composites (FRCs) in dentistry: Past, present and future. Dental Materials, 34(1), 1–12.

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Dental Adhesives: Types, Bonding Mechanisms, and Latest Innovations (2026)

Dental adhesives are materials used to create a strong bond between the tooth and restorative materials such as composite resins, ceramics, or crowns.

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They are essential in modern minimally invasive dentistry, allowing dentists to preserve healthy tooth structure while achieving strong and durable restorations.

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✅ What Are Dental Adhesives?
Dental adhesives are liquid materials that help restorative materials stick to enamel and dentin.
They work by creating a micromechanical and chemical bond between the tooth surface and the restoration.
Without adhesives, modern composite restorations would not be possible.

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✅ Types of Dental Adhesives

1. Etch-and-Rinse Adhesives (Total-Etch)
These systems require a separate acid etching step before applying the adhesive.
▪️ Strong bonding to enamel
▪️ Technique-sensitive
▪️ Risk of postoperative sensitivity if not used correctly

2. Self-Etch Adhesives
These adhesives combine etching and priming in one step.
▪️ Easier and faster to use
▪️ Lower risk of sensitivity
▪️ Slightly weaker enamel bonding compared to total-etch

3. Universal Adhesives
Modern multi-mode systems that can be used as:
▪️ Etch-and-rinse
▪️ Self-etch
▪️ Selective enamel etch
▪️ Highly versatile
▪️ Compatible with many materials
▪️ Most commonly used in current clinical practice

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✅ Bonding Mechanisms
Dental adhesives work through two main mechanisms:

1. Micromechanical Retention
The adhesive penetrates tiny spaces in the tooth surface, forming a “hybrid layer” that locks the material in place.

2. Chemical Bonding
Some modern adhesives can chemically interact with tooth structure and restorative materials, improving long-term stability.

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✅ Clinical Applications
Dental adhesives are used in:

▪️ Composite resin restorations
▪️ Ceramic restorations (veneers, crowns)
▪️ Adhesive bridges
▪️ Sealants and preventive procedures
▪️ Repair of fractured restorations
▪️ Core build-ups
▪️ Minimally invasive dentistry procedures

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✅ Advantages

▪️ Preserves natural tooth structure
▪️ Strong and durable bonding
▪️ Improves esthetics of restorations
▪️ Reduces need for mechanical retention
▪️ Supports minimally invasive treatments
▪️ Compatible with modern restorative materials

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✅ Limitations

▪️ Technique-sensitive procedures
▪️ Moisture contamination reduces bond strength
▪️ Some systems may degrade over time
▪️ Requires strict clinical protocol for success

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✅ Latest Innovations (2026)

Universal Adhesive Systems
Simplified protocols with improved compatibility across multiple materials.

Nanotechnology-Based Formulations
Improved penetration into dentin and enhanced long-term stability.

Bioactive Adhesives
Emerging systems that may support remineralization and antibacterial effects.

Improved Solvent Systems
Faster evaporation and better polymerization, leading to stronger bonds.

Moisture-Tolerant Adhesives
Designed to perform better in less ideal clinical conditions.

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💬 Discussion
Dental adhesives are a cornerstone of adhesive and restorative dentistry.
Their evolution has moved from complex multi-step systems to simplified universal adhesives that maintain strong clinical performance.
However, success still depends heavily on proper technique, isolation, and correct material selection.
Even the most advanced adhesive cannot compensate for poor clinical conditions.

🎯 Recommendations

▪️ Always ensure excellent isolation (rubber dam preferred)
▪️ Follow manufacturer instructions carefully
▪️ Choose adhesive system based on clinical case
▪️ Use selective enamel etching when possible for better retention
▪️ Avoid contamination with saliva or blood
▪️ Light-cure adequately to ensure complete polymerization

✍️ Conclusion
Dental adhesives are essential in modern restorative dentistry, enabling strong, aesthetic, and minimally invasive treatments.
Continuous improvements in universal systems, nanotechnology, and bioactive materials are making adhesive dentistry more reliable and predictable.
Despite technological advances, clinical success still depends on proper technique and strict adherence to protocol.

📚 References

✔ Van Meerbeek, B., Yoshihara, K., Van Landuyt, K., Yoshida, Y., & Peumans, M. (2020). From Buonocore’s pioneering acid-etch technique to self-adhering restoratives. Dental Materials, 36(1), 1–25. https://doi.org/10.1016/j.dental.2019.08.010
✔ Perdigão, J. (2010). Dentin bonding—Variables related to the clinical situation and the substrate treatment. Dental Materials, 26(2), e24–e37. https://doi.org/10.1016/j.dental.2009.11.149
✔ Breschi, L., Mazzoni, A., Ruggeri, A., Cadenaro, M., Di Lenarda, R., & De Stefano Dorigo, E. (2008). Dental adhesion review: Aging and stability of the bonded interface. Dental Materials, 24(1), 90–101. https://doi.org/10.1016/j.dental.2007.02.009
✔ Yoshihara, K., Nagaoka, N., Hayakawa, S., Okihara, T., Yoshida, Y., Van Meerbeek, B. (2021). Functional monomers in adhesive dentistry. Journal of Dental Research, 100(10), 1051–1059. https://doi.org/10.1177/00220345211003542

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Dental Composite Resins: Types, Clinical Applications, and Latest Innovations (2026)

Dental composite resins are among the most widely used restorative materials in modern dentistry. They allow dentists to repair decayed, fractured, or worn teeth while preserving natural tooth structure and providing excellent esthetics.

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Thanks to continuous improvements in filler technology, polymer chemistry, and handling characteristics, today's composite resins offer greater strength, improved wear resistance, and enhanced longevity than previous generations.

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✅ What Are Dental Composite Resins?
Dental composite resins are tooth-colored restorative materials made from three primary components:

▪️ Organic resin matrix (forms the base of the material)
▪️ Inorganic filler particles (increase strength and reduce shrinkage)
▪️ Coupling agent (silane) that chemically bonds the fillers to the resin.
After placement, the material is hardened using a blue curing light, producing a durable restoration that closely resembles natural enamel.

✅ Types of Dental Composite Resins

Type	Main Characteristics	Common Clinical Uses
Microfilled	Excellent polishability, smooth surface, lower mechanical strength.	Anterior restorations and highly esthetic areas.
Hybrid	Balanced combination of strength and esthetics.	Universal restorations in anterior and posterior teeth.
Microhybrid	Improved wear resistance with good esthetic results.	Posterior restorations exposed to moderate chewing forces.
Nanohybrid	High strength, excellent polish retention, and natural appearance.	Universal restorations for both anterior and posterior teeth.
Nanofilled	Superior gloss, excellent polish retention, and outstanding esthetics.	Highly esthetic anterior restorations and cosmetic procedures.
Bulk-fill	Allows thicker increments with reduced polymerization stress.	Posterior restorations requiring faster placement.

Today, nanohybrid and bulk-fill composites are among the most commonly used materials because they combine efficiency, strength, and esthetic performance.

✅ Key Properties
The success of a composite restoration depends on several important properties:

High Esthetics
Composite resins are available in multiple shades and translucencies, allowing excellent color matching.

Adhesive Bonding
They chemically bond to tooth structure using adhesive systems, helping preserve healthy enamel and dentin.

Mechanical Strength
Modern nanohybrid composites provide sufficient strength for both anterior and posterior restorations.

Wear Resistance
Improved filler technology has significantly increased resistance to chewing forces.

Low Polymerization Shrinkage
New formulations reduce shrinkage stress, lowering the risk of marginal gaps and postoperative sensitivity.

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✅ Clinical Applications
Composite resins are indicated for:

▪️ Direct restorations of dental caries
▪️ Replacement of defective restorations
▪️ Anterior esthetic restorations
▪️ Posterior restorations
▪️ Diastema closure
▪️ Tooth reshaping (cosmetic bonding)
▪️ Core build-ups
▪️ Repair of fractured teeth
▪️ Minimally invasive restorations

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✅ Advantages
The popularity of composite resins is due to several important benefits:

▪️ Excellent natural appearance
▪️ Conservative tooth preparation
▪️ Strong adhesive bonding
▪️ Mercury-free material
▪️ Immediate placement in one appointment
▪️ Easy repair if damaged
▪️ Suitable for both functional and cosmetic treatments

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✅ Limitations
Despite their advantages, composite resins also have limitations:

▪️ Technique-sensitive placement
▪️ Moisture control is essential
▪️ Polymerization shrinkage still occurs, although reduced
▪️ May discolor over time with coffee, tea, tobacco, or poor polishing
▪️ Generally less durable than indirect ceramic restorations in very large restorations

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✅ Latest Innovations (2026)
Recent advances continue to improve clinical outcomes:

Improved Nanotechnology
Smaller filler particles enhance strength, polish retention, and long-term gloss.

Next-Generation Bulk-Fill Materials
Allow deeper curing while minimizing shrinkage stress, reducing treatment time.

Universal Shade Composites
Some modern composites adapt optically to surrounding tooth color, reducing the number of shades needed.

Enhanced Photoinitiator Systems
Provide more efficient polymerization and improved color stability.

Bioactive Research
Although still developing, researchers are investigating composites capable of releasing beneficial ions that may support remineralization and reduce secondary caries risk.

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💬 Discussion
Composite resins have become the standard material for direct esthetic restorations because they combine excellent appearance, conservative treatment, and reliable mechanical performance.
Clinical success depends not only on the material itself but also on proper case selection, adhesive technique, isolation, incremental placement when indicated, and careful finishing and polishing.
Current evidence supports the use of nanohybrid and nanofilled composites for most routine restorative procedures due to their favorable balance between esthetics, strength, and durability.

🎯 Recommendations
▪️ Select the composite according to the clinical indication, not only esthetics.
▪️ Maintain excellent moisture control throughout the procedure.
▪️ Follow the manufacturer's recommended light-curing protocol.
▪️ Finish and polish restorations carefully to improve longevity and reduce staining.
▪️ Encourage patients to maintain good oral hygiene and attend regular dental check-ups.

✍️ Conclusion
Dental composite resins remain one of the most versatile and predictable restorative materials in contemporary dentistry. Continuous innovations in filler technology, polymer chemistry, and optical properties have improved their durability, esthetics, and clinical performance.
When combined with proper adhesive techniques and careful clinical execution, composite resins provide long-lasting, minimally invasive, and highly esthetic restorations for both anterior and posterior teeth.

📚 References

✔ Ferracane, J. L. (2011). Resin composite—State of the art. Dental Materials, 27(1), 29–38. https://doi.org/10.1016/j.dental.2010.10.020
✔ Ilie, N., & Hickel, R. (2011). Resin composite restorative materials. Australian Dental Journal, 56(Suppl. 1), 59–66. https://doi.org/10.1111/j.1834-7819.2010.01296.x
✔ Loomans, B. A. C., & Opdam, N. J. M. (2018). A guide to managing tooth wear: The use of direct composite resin restorations. British Dental Journal, 224(5), 348–356. https://doi.org/10.1038/sj.bdj.2018.171
✔ Van Dijken, J. W. V., & Pallesen, U. (2014). A randomized controlled three-year evaluation of "bulk-filled" posterior resin restorations based on stress decreasing resin technology. Dental Materials, 30(9), e245–e251. https://doi.org/10.1016/j.dental.2014.05.028
✔ Ferracane, J. L., Hilton, T. J., Stansbury, J. W., Watts, D. C., Silikas, N., Ilie, N., Heintze, S. D., Cadenaro, M., Hickel, R., Academy of Dental Materials, et al. (2023). Academy of Dental Materials guidance—Resin composites: Part I. Dental Materials, 39(12), 1219–1244. https://doi.org/10.1016/j.dental.2023.10.008

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What Temporary Cement Is Used Today?

Temporary dental cements are materials used to secure temporary crowns, bridges, and restorations until the definitive treatment is completed. Modern products are designed to provide reliable retention while allowing easy removal when needed.

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Today, non-eugenol temporary cements are the preferred choice in many dental practices because they are compatible with modern adhesive systems.

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✅ Introduction
When a tooth receives a temporary crown or bridge, it needs a cement that holds the restoration securely but can still be removed without damaging the tooth.
Several types of provisional cements are available, ranging from traditional zinc oxide formulations to modern resin-based products. The choice depends on treatment duration, retention requirements, and the final cementation protocol.

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✅ Most Common Temporary Cements Used Today

1. Non-Eugenol Zinc Oxide Cements
These are currently among the most widely used temporary cements worldwide.
Popular brands:
▪️ TempBond NE® (Kerr)
▪️ RelyX Temp NE® (3M)
▪️ Provicol® (VOCO)
▪️ TempoCem NE® (DMG)
Advantages:
▪️ Compatible with resin cements
▪️ Easy removal
▪️ Good marginal seal
▪️ Reliable retention

2. Eugenol-Containing Zinc Oxide Cements
Although less common today, they are still used in selected cases.
Popular brands:
▪️ TempBond® (Kerr)
▪️ RelyX Temp E® (3M)
Advantages:
▪️ Soothing effect on sensitive teeth
▪️ Easy clean-up
▪️ Long history of clinical success
Limitation:
▪️ Eugenol may interfere with resin bonding procedures.

3. Resin-Based Temporary Cements
These provide stronger retention and are often selected for long-term provisional restorations.
Popular brands:
▪️ Premier Implant Cement™ (Premier Dental)
▪️ DentoTemp® (Itena)
▪️ Temp-Bond Clear® (Kerr)
Advantages:
▪️ Higher retention strength
▪️ Improved stability
▪️ Better performance for extended temporization

✅ Comparison of Common Temporary Cement Types

Temporary Cement Type	Retention	Resin Compatibility	Ease of Removal
Non-Eugenol Zinc Oxide	Moderate	Excellent	Excellent
Eugenol Zinc Oxide	Moderate	Limited	Excellent
Resin-Based	High	Excellent	Moderate
Calcium Hydroxide-Based	Low–Moderate	Variable	Good

💬 Discussion
The shift toward adhesive dentistry has increased the popularity of non-eugenol temporary cements. Since many final restorations are bonded with resin cements, avoiding eugenol helps ensure optimal adhesion.
Products such as TempBond NE® and RelyX Temp NE® have become standard choices because they combine adequate retention, easy removal, and compatibility with modern restorative materials.
Resin-based temporary cements are also gaining popularity, especially in implant and long-term provisional cases where additional retention is beneficial.

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🎯 Recommendations
▪️ Choose non-eugenol temporary cements when final adhesive cementation is planned.
▪️ Consider resin-based provisional cements for long-term temporaries.
▪️ Use eugenol-containing products only when resin bonding is not anticipated.
▪️ Follow manufacturer instructions for mixing, placement, and cleanup.

✍️ Conclusion
Non-eugenol zinc oxide cements remain the most commonly used temporary dental cements today. Brands such as TempBond NE®, RelyX Temp NE®, Provicol®, and TempoCem NE® are widely recognized for their reliability, ease of use, and compatibility with modern adhesive dentistry. For cases requiring stronger retention, resin-based temporary cements provide an effective alternative.

📚 References

Rosenstiel, S. F., Land, M. F., & Fujimoto, J. (2022). Contemporary fixed prosthodontics (6th ed.). Elsevier.
Shillingburg, H. T., Sather, D. A., Wilson, E. L., Cain, J. R., Mitchell, D. L., Blanco, L. J., & Kessler, J. C. (2020). Fundamentals of fixed prosthodontics (5th ed.). Quintessence Publishing.
Anusavice, K. J., Shen, C., & Rawls, H. R. (2013). Phillips' science of dental materials (12th ed.). Elsevier.
Powers, J. M., & Wataha, J. C. (2024). Dental materials: Properties and manipulation (12th ed.). Elsevier.

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Obsolete Materials in Endodontics and Pulp Therapy: What Should No Longer Be Used?

Modern dentistry has evolved significantly due to advances in biomaterials, bioactive cements, and evidence-based protocols.

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Several materials historically used in endodontics and pulp therapy are now considered obsolete, unsafe, or less effective because of their toxicity, poor sealing ability, cytotoxic effects, or inferior long-term outcomes.
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This article reviews the main materials that should no longer be routinely used in endodontics and pediatric dentistry, including formocresol, paraformaldehyde, arsenical compounds, hydrogen peroxide, and amalgam retrofillings.

✅ Introduction
The evolution of endodontic and pulp therapy procedures has been strongly influenced by scientific research and biomaterial innovation. Historically, many dental materials were introduced before modern biocompatibility standards existed. While some provided short-term clinical success, long-term studies later demonstrated important disadvantages such as tissue toxicity, inflammatory reactions, leakage, and poor regenerative capacity.
Today, minimally invasive and biologically driven dentistry prioritizes materials capable of preserving pulp vitality, stimulating dentin formation, and promoting tissue repair. Consequently, numerous traditional substances have been abandoned or significantly restricted.
Understanding which materials are outdated is essential for both clinicians and dental students in order to avoid complications and improve treatment prognosis.

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✅ Why Some Dental Materials Become Obsolete
Several factors contribute to the discontinuation or restriction of materials in endodontics and pulp therapy:

▪️ Cytotoxicity to pulpal or periapical tissues.
▪️ Mutagenic or carcinogenic potential.
▪️ Poor sealing ability.
▪️ Tissue necrosis.
▪️ Chronic inflammatory reactions.
▪️ Inferior clinical outcomes compared with modern biomaterials.
▪️ Availability of safer and more bioactive alternatives.

Modern dentistry increasingly favors materials that are:
▪️ Bioactive.
▪️ Biocompatible.
▪️ Antibacterial.
▪️ Sealing.
▪️ Regenerative.
▪️ Stable over time.

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1. Formocresol in Pediatric Dentistry
Historical Use
Formocresol was widely used for decades in pulpotomy procedures of primary teeth because of its ability to fix and mummify pulpal tissue.

Why It Is No Longer Recommended
Current evidence has raised serious concerns regarding its biological safety.

Main Disadvantages
▪️ Contains formaldehyde.
▪️ Potential mutagenic and carcinogenic effects.
▪️ Systemic distribution after application.
▪️ Tissue fixation instead of true healing.
▪️ Chronic inflammatory response.

Current Alternatives
Modern pulpotomy protocols favor bioactive materials such as:
▪️ Mineral trioxide aggregate (MTA).
▪️ Biodentine.
▪️ Calcium silicate-based cements.
▪️ Bioceramic materials.
These materials stimulate dentin bridge formation and preserve healthier pulpal tissue.

2. Paraformaldehyde in Endodontics
Historical Use
Paraformaldehyde-containing pastes were used to devitalize inflamed pulps, especially in difficult anesthesia situations.

Why It Should Not Be Used
Paraformaldehyde is highly toxic and may diffuse beyond the root canal system.

Clinical Risks
▪️ Severe tissue necrosis.
▪️ Bone destruction.
▪️ Persistent pain.
▪️ Delayed healing.
▪️ Damage to periodontal structures.
▪️ Neurotoxicity in severe cases.
Because of these complications, modern endodontics strongly discourages its use.

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3. Arsenical Compounds
Historical Use
Arsenic compounds were historically employed to intentionally devitalize pulp tissue before root canal treatment.

Why They Are Obsolete
Arsenic is considered one of the most dangerous substances ever used in dentistry.

Serious Complications
▪️ Osteonecrosis.
▪️ Bone sequestration.
▪️ Gingival necrosis.
▪️ Periodontal destruction.
▪️ Severe inflammatory reactions.
▪️ Irreversible tissue damage.
Modern anesthesia and rotary instrumentation have completely eliminated the need for arsenical compounds.

4. Hydrogen Peroxide in Endodontics
Previous Use
Hydrogen peroxide was previously combined with sodium hypochlorite during root canal irrigation because of its bubbling effect.

Why It Is No Longer Recommended
Although it creates effervescence, hydrogen peroxide does not effectively dissolve organic tissue or calcium hydroxide remnants.

Main Problems
▪️ Oxygen bubble formation.
▪️ Risk of emphysema.
▪️ ▪️ Reduced effectiveness of sodium hypochlorite.
▪️ Limited antimicrobial effectiveness compared with modern irrigants.
▪️ Potential extrusion into periapical tissues.

Current Irrigation Protocols
Modern endodontics primarily uses:
▪️ Sodium hypochlorite (NaOCl).
▪️ EDTA 17%.
▪️ Chlorhexidine in selected situations.
▪️ Sonic or ultrasonic irrigation activation.

5. Zinc Oxide Eugenol Directly Over Permanent Pulp Tissue
Historical Use
Zinc oxide eugenol (ZOE) was commonly used as a sedative base and temporary restorative material.

Limitations in Vital Pulp Therapy
Although still useful in some restorative applications, direct contact with pulp tissue is no longer preferred.

Problems
▪️ Cytotoxic effect of eugenol.
▪️ Chronic pulpal irritation.
▪️ Inferior dentin bridge formation.
▪️ Reduced regenerative capacity.

Better Alternatives
▪️ MTA.
▪️ Biodentine.
▪️ Bioceramic liners.
These materials provide superior sealing and biological repair.

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💬 Discussion
The transition from traditional dental materials to modern bioactive biomaterials reflects the growing emphasis on biological preservation and minimally invasive dentistry. Contemporary evidence demonstrates that many older substances once considered acceptable can negatively affect pulp vitality, periapical healing, and long-term treatment success.
Among all obsolete materials, arsenical compounds and paraformaldehyde represent the most hazardous due to their destructive potential. Likewise, formocresol remains controversial because of its formaldehyde content and systemic concerns.
Modern bioactive materials such as MTA and Biodentine have significantly improved outcomes in both adult and pediatric dentistry by promoting tissue regeneration rather than tissue fixation or necrosis.

🎯 Clinical Recommendations
▪️ Avoid outdated devitalizing agents.
▪️ Use bioactive materials whenever possible.
▪️ Prioritize minimally invasive pulp therapy.
▪️ Follow evidence-based irrigation protocols.
▪️ Use sodium hypochlorite and EDTA instead of hydrogen peroxide.
▪️ Select bioceramic materials for pulp capping and apical surgery.
▪️ Continuously update clinical protocols according to current literature.

✍️ Conclusion
Several materials historically used in endodontics and pulp therapy are now considered obsolete because of their toxicity, poor biological behavior, and inferior clinical outcomes. Modern dentistry favors biocompatible and regenerative materials capable of preserving pulp vitality and improving long-term success.
Clinicians should avoid the routine use of substances such as formocresol, paraformaldehyde, arsenic compounds, and hydrogen peroxide in endodontic procedures. Instead, evidence-based biomaterials like MTA, Biodentine, and calcium silicate cements should be prioritized to ensure safer and more predictable treatments.

📚 References

✔ Torabinejad M, Parirokh M. Mineral trioxide aggregate: a comprehensive literature review. Part II: Leakage and biocompatibility investigations. Journal of Endodontics. 2010;36(2):190-202.
✔ American Academy of Pediatric Dentistry. Pulp therapy for primary and immature permanent teeth. Pediatric Dentistry. 2024;46(6):399-407. Siqueira JF, Rôças IN. Clinical implications and microbiology of bacterial persistence after treatment procedures. Journal of Endodontics. 2008;34(11):1291-1301.
✔ Estrela C, Estrela CRA, Decurcio DA, Hollanda ACB, Silva JA. Antimicrobial efficacy of ozonated water, gaseous ozone, sodium hypochlorite and chlorhexidine in infected human root canals. International Endodontic Journal. 2007;40(2):85-93.
✔ Parirokh M, Torabinejad M. Mineral trioxide aggregate: a comprehensive literature review. Part I: Chemical, physical, and antibacterial properties. Journal of Endodontics. 2010;36(1):16-27.
✔ Fuks AB. Current concepts in vital primary pulp therapy. European Journal of Paediatric Dentistry. 2002;3(3):115-120.
✔ Haapasalo M, Shen Y, Wang Z, Gao Y. Irrigation in endodontics. British Dental Journal. 2014;216(6):299-303.

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CTZ Paste in Pediatric Dentistry: Indications, Composition, and Success Rates

CTZ paste is a medicament used in pediatric dentistry for the treatment of infected primary teeth, particularly in cases of extensive caries associated with irreversible pulp inflammation or necrosis. The acronym CTZ refers to its three active components: chloramphenicol, tetracycline, and zinc oxide-eugenol.

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This article reviews the composition, indications, contraindications, clinical protocol, and success rates of CTZ paste based on current scientific evidence.

✅ Introduction
Management of deep carious lesions in primary teeth remains a significant challenge in pediatric dentistry. Conventional pulpectomy requires mechanical instrumentation and multiple appointments, which may be difficult in preschool children with limited cooperation.
To address these limitations, CTZ paste was introduced by Soller and Cappiello in Latin America as an alternative root canal filling material that allows disinfection of the root canal system without mechanical instrumentation. The antimicrobial properties of chloramphenicol and tetracycline, combined with the sealing ability of zinc oxide-eugenol, provide a minimally invasive treatment option for primary molars with pulp pathology.

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✅ What Is CTZ Paste?
CTZ paste is an intracanal medicament composed of two broad-spectrum antibiotics and zinc oxide-eugenol. It is designed to sterilize infected root canals in primary teeth while avoiding extensive instrumentation.

✅ Composition of CTZ Paste

Component	Function
Chloramphenicol	Broad-spectrum antibiotic effective against aerobic and anaerobic bacteria.
Tetracycline	Antibiotic active against gram-positive and gram-negative microorganisms.
Zinc Oxide-Eugenol	Provides sealing properties, antibacterial action, and paste consistency.

Common Formulation
The original formulation includes:
▪️ 500 mg chloramphenicol
▪️ 500 mg tetracycline
▪️ Zinc oxide powder mixed with one drop of eugenol until a thick consistency is obtained
The proportions may vary slightly depending on institutional protocols.

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✅ Mechanism of Action
The success of CTZ paste is based on:

1. Broad-spectrum antimicrobial activity
2. Diffusion through dentinal tubules and accessory canals
3. Suppression of residual microorganisms
4. Sealing of the pulp chamber and canal orifices
This allows clinical resolution of infection even when root canals are not mechanically instrumented.

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✅ Indications for CTZ Paste
CTZ paste is indicated primarily for primary molars presenting with:

▪️ Extensive caries with pulp exposure
▪️ Irreversible pulpitis
▪️ Pulp necrosis
▪️ Furcation radiolucency of endodontic origin
▪️ Presence of fistula or abscess without excessive pathological root resorption
▪️ Patients with limited cooperation
▪️ Situations requiring short treatment times

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✅ Contraindications
CTZ paste should not be used when:

▪️ The tooth is non-restorable
▪️ Physiologic or pathologic root resorption exceeds one-third of root length
▪️ Advanced mobility is present
▪️ There is severe destruction of the supporting bone
▪️ The patient has a known allergy to tetracycline or chloramphenicol
▪️ Permanent successor eruption is imminent

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✅ Clinical Procedure

Step-by-Step Technique
1. Administer local anesthesia and isolate the tooth.
2. Remove caries and gain access to the pulp chamber.
3. Remove necrotic coronal pulp tissue.
4. Irrigate with saline solution.
5. Dry the pulp chamber.
6. Place CTZ paste over the canal entrances.
7. Cover with zinc oxide-eugenol or glass ionomer cement.
8. Restore the tooth definitively, preferably with a stainless steel crown.

✅ Success Rates of CTZ Paste
Several studies have reported favorable clinical and radiographic outcomes.

Reported Outcomes

Study	Follow-up	Clinical Success	Radiographic Success
Doneria et al., 2017	12 months	100%	86.7%
Nakornchai et al., 2010	24 months	96%	84%
Barcelos et al., 2015	12 months	93–100%	80–95%
Recent Systematic Reviews	12–24 months	>90%	75–95%

These findings suggest that CTZ paste is a reliable option in selected cases, especially where conventional pulpectomy is impractical.

✅ Advantages of CTZ Paste

▪️ No mechanical instrumentation required
▪️ Significantly reduced treatment time
▪️ Lower technical complexity
▪️ Good antimicrobial effectiveness
▪️ High clinical success rates
▪️ Suitable for very young or anxious children

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✅ Limitations and Concerns
Despite promising results, several concerns remain:

Antibiotic-Related Issues
▪️ Use of chloramphenicol raises concerns because of rare but serious systemic adverse effects, such as aplastic anemia.
▪️ Potential contribution to antimicrobial resistance.
▪️ Limited acceptance in some countries due to regulatory restrictions.

Tooth Discoloration
Tetracycline may cause intrinsic staining if inadvertently incorporated into surrounding structures.

Lack of Standardization
Differences in formulation and application protocols may affect treatment outcomes.

✅ Comparison with Other Pulpectomy Materials

Material	Clinical Success	Main Advantages	Limitations
CTZ Paste	90–100%	Fast, simple, and does not require canal instrumentation.	Contains antibiotics with potential regulatory and safety concerns.
Zinc Oxide-Eugenol (ZOE)	80–95%	Widely available and extensively studied.	May resorb more slowly than primary tooth roots.
Vitapex® (Calcium Hydroxide + Iodoform)	85–100%	Highly resorbable, biocompatible, and easy to apply.	Higher cost and possible intracanal voids.
Metapex®	85–98%	Good antimicrobial activity and favorable resorption profile.	Can resorb faster than the physiologic root resorption process.
Endoflas FS	90–98%	Excellent antimicrobial properties and resorbs when extruded.	May cause mild postoperative irritation in some cases.

💬 Discussion
Current evidence indicates that CTZ paste is an effective alternative for treating infected primary molars, especially when cooperation is limited and rapid intervention is necessary. Clinical success is consistently high, and radiographic outcomes are generally favorable.
However, the presence of chloramphenicol remains controversial due to safety concerns and regulatory limitations in several countries. For this reason, clinicians should consider local guidelines, antibiotic stewardship principles, and parental informed consent before selecting this material.
Although randomized clinical trials and systematic reviews support CTZ paste, long-term evidence and standardized protocols are still needed.

🎯 Clinical Recommendations
1. Reserve CTZ paste for restorable primary molars with adequate root structure.
2. Use stainless steel crowns for definitive restoration to improve longevity.
3. Obtain informed consent when using antibiotic-containing materials.
4. Monitor clinically and radiographically every 6–12 months.
5. Consider alternative materials if local regulations restrict chloramphenicol use.

✍️ Conclusion
CTZ paste is a practical and evidence-based option for non-instrumentation endodontic treatment in primary teeth. Its simplified technique and high success rates make it particularly valuable in pediatric patients with behavioral limitations. Nevertheless, concerns regarding chloramphenicol and antimicrobial stewardship require careful case selection and adherence to current regulations. When used appropriately and followed by durable coronal restoration, CTZ paste can provide predictable outcomes until normal exfoliation of the primary tooth.

📚 References

✔ Barcelos, R., Santos, M. P. A., Primo, L. G., Luiz, R. R., & Maia, L. C. (2015). ZOE paste pulpectomies outcome in primary teeth: A systematic review. Journal of Clinical Pediatric Dentistry, 39(3), 241–248. https://doi.org/10.17796/1053-4628-39.3.241
✔ Doneria, D., Thakur, S., Singhal, P., Chauhan, D., Jayam, C., & Uppal, N. (2017). Comparative evaluation of clinical and radiographic success of three pulpotomy agents in primary molars. Journal of Clinical and Diagnostic Research, 11(8), ZC09–ZC12. https://doi.org/10.7860/JCDR/2017/25835.10362
✔ Nakornchai, S., Banditsing, P., & Visetratana, N. (2010). Clinical evaluation of 3Mix and Vitapex as treatment options for pulpally involved primary molars. International Journal of Paediatric Dentistry, 20(3), 214–221. https://doi.org/10.1111/j.1365-263X.2010.01044.x
✔ Rosenblatt, A., Stamford, T. C. M., & Niederman, R. (2009). Silver diamine fluoride: A caries “silver-fluoride bullet.” Journal of Dental Research, 88(2), 116–125. https://doi.org/10.1177/0022034508329406
✔ Trairatvorakul, C., & Chunlasikaiwan, S. (2008). Success of pulpectomy with zinc oxide-eugenol vs calcium hydroxide/iodoform paste in primary molars. International Journal of Paediatric Dentistry, 18(4), 303–308. https://doi.org/10.1111/j.1365-263X.2008.00921.x

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Clinpro Varnish: Application Protocols & Dosing Guide

Clinpro varnish is a fluoride-based preventive agent widely used to reduce dental caries risk and enhance enamel remineralization. Its formulation, incorporating 5% sodium fluoride (NaF) and functionalized additives, enables sustained fluoride release and improved adherence to tooth surfaces.

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This article reviews its composition, properties, clinical benefits, limitations, application protocol, and recommended frequency across different risk profiles.

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✅ Introduction
The global burden of dental caries necessitates evidence-based preventive strategies. Fluoride varnishes have become a cornerstone in modern dentistry due to their efficacy, safety, and ease of application. Among these, Clinpro White Varnish stands out for its innovative formulation designed to optimize fluoride bioavailability and patient compliance.

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✅ Composition
Clinpro varnish contains:

▪️ 5% Sodium Fluoride (NaF) (22,600 ppm fluoride)
▪️ Modified rosin base for adhesion
▪️ Calcium and phosphate components (functionalized tricalcium phosphate, fTCP)
▪️ Flavoring agents and ethanol-based solvents
The inclusion of fTCP technology enhances bioavailable calcium and phosphate ions, promoting synergistic remineralization.

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✅ Key Characteristics
▪️ High fluoride concentration for rapid uptake
▪️ Prolonged contact time with enamel
▪️ Moisture-tolerant application
▪️ White-to-translucent transition, improving esthetics
▪️ Ease of use in pediatric and high-risk patients

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✅ Clinical Benefits
▪️ Significant reduction in caries incidence
▪️ Enhanced enamel remineralization
▪️ Inhibition of demineralization processes
▪️ Desensitizing effect on exposed dentin
▪️ Improved patient compliance due to rapid application

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✅ Advantages and Disadvantages

Advantages
▪️ High efficacy in caries prevention
▪️ Safe for children and adults
▪️ Minimal ingestion risk compared to gels/foams
▪️ Quick and non-invasive procedure

Disadvantages
▪️ Temporary tooth discoloration (whitish film)
▪️ Taste sensitivity in some patients
▪️ Requires professional application
▪️ Limited effectiveness if oral hygiene is poor

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✅ Step-by-Step Application Protocol

1. Clinical assessment and caries risk evaluation
2. Tooth cleaning (prophylaxis if necessary)
3. Isolation with cotton rolls or gauze
4. Drying of tooth surfaces (relative isolation is sufficient)
5. Application of varnish using a microbrush in a thin layer
6. Allow setting (contact with saliva facilitates hardening)
7. Postoperative instructions:
▪️ Avoid eating hard foods for 2–4 hours
▪️ Delay brushing for at least 6 hours

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✅ Frequency of Application

Low Caries Risk
▪️ Every 6 months

Moderate Risk
▪️ Every 3–6 months

High Caries Risk (e.g., ECC, xerostomia, orthodontic patients)
▪️ Every 3 months or more frequently based on clinical judgment

Special Cases
▪️ Hypersensitivity: weekly applications initially, then reassessment
▪️ Post-orthodontic treatment: every 3–6 months

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✅ Special Cases: Dentin Hypersensitivity Protocol
In patients presenting with dentin hypersensitivity, the use of Clinpro varnish should follow a structured, response-based protocol rather than fixed long-term weekly applications.

Initial Phase (Rapid Symptom Control)
▪️ Apply once weekly for 2–4 weeks
▪️ Aim: occlusion of dentinal tubules and rapid reduction of sensitivity

Reevaluation (After 2–4 Weeks)
Clinical response should be assessed using air stimulus and/or tactile testing, preferably with a visual analog scale (VAS).

Management Based on Clinical Response

1. Marked Improvement (≥70–80% reduction in symptoms)
▪️ Discontinue intensive phase
▪️ Transition to maintenance applications every 3–6 months
▪️ Reinforce use of desensitizing toothpaste (e.g., potassium nitrate, arginine-based formulations)

2. Partial Improvement (30–70%)
▪️ Continue with biweekly applications for 4–8 weeks
▪️ Then reduce to monthly applications until symptom stabilization
▪️ Reassess contributing factors such as erosion, abrasion, or gingival recession

3. Minimal or No Improvement (less than 30%)
▪️ Reevaluate diagnosis (exclude cracked tooth, caries, or pulpal pathology)
▪️ Consider a short additional cycle of weekly applications (2 weeks)
▪️ Implement adjunctive therapies, such as:
- Dentin bonding agents or sealants
- Laser therapy
- Desensitizing agents containing oxalates or glutaraldehyde (HEMA)

Clinical Considerations
▪️ Indefinite weekly application is not recommended
▪️ Treatment should aim for symptom control followed by interval extension
▪️ Lack of response requires diagnostic reassessment and therapeutic modification

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🎯 Recommendations
▪️ Incorporate Clinpro varnish in routine preventive care, especially in high-risk populations
▪️ Combine with fluoride toothpaste and dietary counseling
▪️ Tailor application frequency based on individualized caries risk assessment
▪️ Educate patients on post-application care to maximize efficacy
▪️ Monitor outcomes through regular recall visits

📚 References

✔ Buzalaf, M. A. R., Pessan, J. P., Honório, H. M., & ten Cate, J. M. (2011). Mechanisms of action of fluoride for caries control. Monographs in Oral Science, 22, 97–114. https://doi.org/10.1159/000325151
✔ Marinho, V. C. C., Worthington, H. V., Walsh, T., & Clarkson, J. E. (2013). Fluoride varnishes for preventing dental caries in children and adolescents. Cochrane Database of Systematic Reviews, (7), CD002279. https://doi.org/10.1002/14651858.CD002279.pub2
✔ Twetman, S. (2009). Prevention of early childhood caries (ECC)—review of literature published 1998–2007. European Archives of Paediatric Dentistry, 10(1), 12–18. https://doi.org/10.1007/BF03262661
✔ Zero, D. T., & Lussi, A. (2006). Behavioral factors. In Dental Caries: The Disease and Its Clinical Management (2nd ed.). Blackwell Munksgaard.
✔ 3M Oral Care. (2020). Clinpro White Varnish Technical Product Profile. 3M Company.

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