Hashimoto Masanori, Hirose Nanako, Kitagawa Haruaki, Yamaguchi Satoshi, Imazato Satoshi
Institute of Dental Research, Osaka Dental University.
Department of Restorative Dentistry and Endodontology, Graduate School of Dentistry, Osaka University.
Dent Mater J. 2018 Jul 29;37(4):620-627. doi: 10.4012/dmj.2017-209. Epub 2018 Apr 17.
The 12-methacryloxydodecylpyridium bromide (MDPB) has been reported to act as a matrix metalloprotease (MMP) inhibitor. In this study, the effects of application of MDPB on resin-dentin bonds were evaluated. The resin-dentin bonded specimens were prepared with a commercial MDPB-containing self-etching primer or a self-etching primer without MDPB, and stored 24 h or 1 year. Surfaces were pretreated with chlorhexidine or MDPB-containing cavity disinfectant. Additionally, we compared the degradation patterns between the two self-etching adhesives and etch and rinse system. Water tree formations were observed as the typical morphological phase of the two tested self-etching adhesives for both 24 h and 1 year groups. The degradation phase of collagen network depletion was observed in the adhesive interface of the etch-and-rinse system in the 1 year group. Pretreatment with chlorhexidine did not prevent bond strength reduction after 1 year. The cavity disinfectant improved the bond durability for the self-etching adhesive.
