Multiple Coatings can Improve the Bond Durability of One-step Self-etching Adhesive to Primary Dentin

• Published in: Chinese medical sciences journal Vol. 27; no. 2; pp. 106 - 111
• Main Authors: Ma, Lin, Zhou, Jian-feng, Jing, Quan, Zhao, Ji-zhi, Wan, Kuo
• Format: Journal Article
• Language: English
• Published: China Department of Stomatology, Peking Union Medical College Hospital,Chinese Academy of Medical Sciences & Peking Union Medical College,Beijing 100730, China%Department of Prosthodontics, Peking University School & Hospital of Stomatology, Beijing 100081, China 01.06.2012
• Subjects: Acid Etching, Dental - methods; Adhesiveness; Child; Coated Materials, Biocompatible - chemical synthesis; Coated Materials, Biocompatible - chemistry; Coated Materials, Biocompatible - pharmacology; Dental Cements - chemical synthesis; Dental Cements - chemistry; Dental Cements - pharmacology; Dental Prosthesis; Dental Restoration Failure; Dentin - chemistry; Dentin - drug effects; Dentin-Bonding Agents - pharmacology; Electroplating - methods; Equipment Failure Analysis; Humans; Materials Testing; Tensile Strength - drug effects; 债券; 光固化胶粘剂; 原发性; 涂料; 牙本质; 粘接; 耐久性; 酸蚀; multiple coatings; primary dentin; microtensile bond strength test; self-etching adhesive
• ISSN: 1001-9294

Objective To investigate whether multiple coatings can improve the bond durability of one-step self-etching adhesive to primary dentin. Methods Twelve caries-free human primary molars were randomly divided into 2 groups. In group 1, each tooth was hemisected into 2 halves. One half was assigned to the control subgroup 1, which was bonded with a commercially available one-step self-etching adhesive according to the manufacturer＇s instruc- tions; the other half was assigned to experimental subgroup 1, in which the adhesive was applied three times before light curing. In group 2, one split half tooth was bonded with a commercially available one-step self-etching adhesive according to the manufacturer＇s instructions; for the other half, three layers of adhesive were applied with each successive layer of light curing. Specimens were stored in 0.9% NaC1 containing 0.02% sodium azide at 37℃ for 18 months and then were subjected to microtensile bond strength test and the fracture mode analysis. Results When the adhesive was applied three times before light curing, the bond strength of the ex- perimental subgroup 1 was significantly higher than that of the control subgroup 1 （47.46__＋13.91 vs. 38.12＋11.21 MPa, P〈O.05）. When using the technique of applying multiple layers of adhesive with each successive layer of light curing, no difference was observed in bond strength between the control subgroup and the experimental subgroup （39.40＋8.87 vs. 40.87-＋9.33 MPa, P〉O.05）. Conclusion Multiple coatings can improve the bond durability of one-step self-etching adhesive to primary dentin when using the technique of light-curing after applying 3 layers of adhesive.