We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Noninvasive Pit and Fissure Sealing: Microtensile Bond Strength to Intact Bovine Enamel of Different Pit and Fissure Sealants in a Simplified Fissure Model.
- Authors
Papacchinia, Federica; Cury, Álvaro H.; Goracci, Cecilia; Chieffi, Nicoletta; Tay, Franklin R.; Polimeni, Antonella; Ferrari, Marco
- Abstract
Purpose: To measure the microtensile bond strength of different pit and fissure sealants in a simplified fissure model. Materials and Methods: Twenty extracted bovine mandibular permanent incisors were randomly divided into 4 groups for treatment: G1: 35% phosphoric acid/Clinpro Sealant; G2: 35% phosphoric acid/Delton; G3: Non-Rinse Conditioner/Dyract Seal; G4: 20% polyacrylic acid/Fuji IILC. Each tooth was sectioned into 6 pieces (4 x 6 mm) of buccal enamel. SEM examination was used to confirm the presence of aprismatic enamel on each tooth. Using a spacer, two pieces of etched enamel were secured to a glass slide at a mean distance of 0.6 ± 0.1 mm. The space between enamel substrates was then etched/conditioned and sealed with different materials according to the tested groups. By serially cutting each double-bonded sample, multiple beam-shaped specimens about 0.8mm² in cross section were obtained and tested in tension (0.5 mm/min) until failure occurred at either one of the two stressed interfaces. Failure modes were classified by stereomicroscopy. Results: G1 and G2 showed statistically higher bond strengths than G3 and G4. G4 demonstrated the significantly lowest bond strength. Failures were mostly adhesive in G1, G2, G3, and mainly cohesive/mixed in G4. Conclusion: According to this model, resin-based materials (Clinpro Sealant, Delton) showed better microtensile bond strength than compomer (Dyract Seal) or resin-modified glass ionomer (Fuji IILC).
- Subjects
PIT &; fissure sealants (Dentistry); DENTAL bonding; STRENGTH of materials; DENTAL materials; DENTAL enamel; DENTAL fillings; SEALING compounds
- Publication
Journal of Adhesive Dentistry, 2006, Vol 8, Issue 6, p375
- ISSN
1461-5185
- Publication type
Article