Micro-shear bond strength of five resin-based composites to dentin with five different dentin adhesives.
OBJECTIVE
To test whether the combination of dentin adhesive and resin-based composite from the same manufacturer had higher micro-shear bond strength than the other combinations of different manufacturers.


METHODS
25 experimental micro-shear bond test groups were made from the combination of five resin-based composites and five dentin adhesives (three total-etch adhesives and two self-etch adhesives) with extracted human molars stored in saline for 24 hours. The test was performed with the wire-loop method using a universal testing machine, and the micro-shear bond strengths were calculated. SEM photomicrographs of fractured sites were taken to check the failure mode.


RESULTS
The combinations from same manufacturers failed to show higher bond strengths than the other combinations. Self-etch adhesives showed significantly higher micro-shear bond strengths than total-etch adhesives (P < 0.05). In total-etch adhesives, the kind of resin composite was important and in self-etch adhesives, the kind of adhesive had significant effect on micro-shear bond strength (P < 0.05). All sites showed mixed fractures.
Roh
Oung-Duck
OD
Department of Conservative Dentistry, Dental College, Yonsei University, 134 Shinchon-Dong, Seodaemoon-Gu, Seoul, Korea. operatys16@yumc.yonsei.ac.kr
Chung
Jin-Ho
JH
D000180:Acrylic Resins / Q000737:chemistry*; D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D019232:Dental Restoration Failure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008963:Molar; D011140:Polyurethanes / Q000737:chemistry*; D033081:Shear Strength
D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D011140:Polyurethanes