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.
Nihon University School of Dentistry, Department of Operative Dentistry, Tokyo, Japan.
Takeshi
T
Yoshida
Masashi
M
Miyazaki
Naoshi
N
Hirohata
B Keith
BK
Moore
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