Influence of metal conditioner contamination of the dentin surface on bond strengths of dentin adhesive systems using self-etching primers.
Carious lesions around crown margins sometimes lead to failure of fixed prosthodontics. This study examined the influence of metal conditioner application on a dentin surface prior to bonding procedures, using two-step self-etching primer systems. Commercially available metal conditioners and self-etching primer dentin bonding systems were used. Bovine mandibular incisors were mounted in self-curing resin, and the facial dentin surfaces were ground wet on 600-grit SiC paper. The metal primers were applied on the dentin surface followed by bonding procedures with four different types of self-etching primer systems. The resin composites were condensed into a mold on the dentin surface and light activated. Ten specimens per test group were stored in 37 degrees C water for 24 hours; they were then shear tested at a crosshead speed of 1.0 mm/minute. Two-way ANOVA and Tukey's HSD tests were done. When the metal conditioners were applied on dentin surfaces before bonding procedures, there was a tendency for decreased dentin bond strengths compared to those obtained with the controls. This tendency differed among the combinations of metal conditioners and self-etching primer systems used. Appropriate surface treatments are required to get optimum bond strengths with the use of technique sensitive bonding systems combined with metal conditioners.
Yoshida
Takeshi
T
Nihon University School of Dentistry, Department of Operative Dentistry, Tokyo, Japan.
Miyazaki
Masashi
M
Hirohata
Naoshi
N
Moore
B Keith
BK
D000704:Analysis of Variance; D000818:Animals; D002417:Cattle; D045662:Dental Etching; D003804:Dentin / Q000737:chemistry / Q000187:drug effects*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D007180:Incisor / Q000187:drug effects; D008689:Methacrylates / Q000494:pharmacology*; D033081:Shear Strength
D017220:Dentin-Bonding Agents; D008689:Methacrylates; C100646:Metal Primer