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Effects of air polishing on the resin composite–dentin interface |
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| Authors: | Yutaka Shimizu Kazuhiro Tada Hideaki Seki Kiyoshi Kakuta Yukio Miyagawa Jie-Fei Shen Yuko Morozumi Hisahiro Kamoi Soh Sato |
| Institution: | 1. Department of Periodontology, The Nippon Dental University School of Life Dentistry at Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata, Niigata, 951-8580, Japan 2. Comprehensive Dental Care, The Nippon Dental University Niigata Hospital, 1-8 Hamaura-cho, Chuo-ku, Niigata, Niigata, 951-8580, Japan 3. Department of Dental Materials Science, The Nippon Dental University School of Life Dentistry at Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata, Niigata, 951-8580, Japan 4. Division of Biomaterials, Advanced Research Center, The Nippon Dental University School of Life Dentistry at Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata, Niigata, 951-8580, Japan 5. State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, No. 14, 3rd Section of Renminnan Road, Sichuan, Chengdu, 610041, China 6. Nippon Medical School Chiba Hokusoh Hospital, 1715 Kamakari, Inzai, Chiba, 270-1300, Japan |
| Abstract: | The aim of this study was to examine defect depths and volumes at the resin composite–dentin (R/D) interface after air polishing with different particles and spray angles. Samples were 54 dentin specimens that were formed in saucer-shaped cavities filled with resin composite. Each specimen was air polished with either sodium bicarbonate (NaHCO3) or one of two glycine (Gly) powders. The air polisher was set at angles of 90° to the interface and at 45° to the interface from both the dentin and resin composite sides. Air polishing with Gly powder produced defects with less depth and volume than NaHCO3 powder (p < 0.05). Air polishing with a spray angle of 45° to the interface from the resin composite side produced fewer defects (p < 0.05) than polishing from the dentin side. Air polishing to the R/D interface from the resin composite side produced fewer defects to the interface because the hardness of the resin composite was higher than that of dentin. |
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