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Evaluation of Near-Infrared Transparent Sealants for Occlusal Sealing: An In Vitro Study
Camille Litzler1, Lydia Vazquez2, Clara Isabel Anton Y Otero1
1Division of Cariology and Endodontology, CUMD-University Clinics of Dental Medicine, University of Geneva, Rue Michel-Servet 1, 1211 Geneva 4, Switzerland.
Materials (Basel, Switzerland)
|June 13, 2025
Summary
Transparent resin sealants like Helioseal Clear and Fissurit offer excellent marginal adaptation and allow lesion monitoring. However, OptiBond FL primer negatively impacted adaptation when used before the adhesive.
Area of Science:
- Dental Materials Science
- Caries Management
- Restorative Dentistry
Background:
- Occlusal sealants are crucial for preventing caries progression.
- Evaluating sealant translucency and marginal adaptation under stress is essential.
- Understanding material behavior post-fatigue and thermocycling informs clinical practice.
Purpose of the Study:
- To compare translucency and marginal adaptation of five resin-based sealants.
- To assess sealant performance before and after simulated intraoral stress.
- To test hypotheses regarding transillumination and marginal integrity.
Main Methods:
- Near-infrared transillumination and scanning electron microscopy were employed.
- Forty human molars with early caries were sealed with five different materials.
- Materials were subjected to simultaneous fatigue and thermocycling to mimic clinical conditions.
Main Results:
- Helioseal Clear and Fissurit exhibited full translucency.
- Excellent marginal adaptation was observed for OptiBond FL (adhesive), Scotchbond Universal with OptiBond FL, Fissurit, and Helioseal Clear.
- OptiBond FL primer application before adhesive reduced marginal adaptation significantly.
Conclusions:
- Transparent sealants (Helioseal Clear, Fissurit) aid in monitoring caries with 850 nm transillumination.
- Most tested sealants demonstrated robust marginal adaptation.
- Avoid using OptiBond FL primer on enamel before adhesive application to ensure optimal adaptation.
