- 【Updated on May 12, 2025】 Integration of CiNii Dissertations and CiNii Books into CiNii Research
- Trial version of CiNii Research Knowledge Graph Search feature is available on CiNii Labs
- 【Updated on June 30, 2025】Suspension and deletion of data provided by Nikkei BP
- Regarding the recording of “Research Data” and “Evidence Data”
Study on Tensile Bond Strength of Composite Resin for Dental Hard Tissues Irradiated by Er,Cr:YSGG Laser
-
- WANG Xiangyu
- Department of Operative Dentistry, Osaka Dental University
-
- IWATA Naohiro
- Department of Operative Dentistry, Osaka Dental University
-
- YASUO Kenzo
- Department of Operative Dentistry, Osaka Dental University
-
- YOSHIKAWA Kazushi
- Department of Operative Dentistry, Osaka Dental University
-
- YAMAMOTO Kazuyo
- Department of Operative Dentistry, Osaka Dental University
Bibliographic Information
- Other Title
-
- Er,Cr:YSGGレーザー照射歯質に対するコンポジットレジンの接着強さ
Search this article
Description
Various types of laser have been developed and put to use in dental procedures in recent years. One of such lasers, called the Erbium, Chromium: Yttrium Scandium Gallium Garnet （Er,Cr:YSGG） laser, can be used to cut hard tissue. In this study, we examined the bond strength of resin composites of 1-bottle 1-step bonding systems to the enamel and dentin after Er,Cr:YSGG laser irradiation, and the effects of removing the denatured dentin with clinical tools on the bond strength. The study was performed after obtaining approval from the Animal Care and Use Committee, Osaka Dental University （Approval No.: 16-09004）. As the 1-bottle 1-step bonding systems, we used G-BOND PLUS （GC, GP）, and AdperTM EASY BOND （3M, EB）. We used bovine teeth, and measured the bond strength to tooth substances with laser irradiation （LI）, in which the laser was uniformly irradiated on the enamel and dentin, and without laser irradiation （Control）. Furthermore, for dentin that was used as the specimen, we measured the bond strength and conducted Scanning Electron Microscope （SEM） observation on the fractured surface under five conditions intended to remove the dentin denatured by laser: phosphoric acid etching for 20 sec after laser irradiation （LI＋PA）, cutting with a round-shaped steel bur or spoon excavator for 20 sec after laser irradiation （RB, SE）, and phosphoric acid etching for 20 sec after cutting with either tool （RB＋PA, SE＋PA） （n＝5）. We conducted statistical analysis on the measurement results according to two-way analysis of variance and Tukey’s test （P＜0.05）. As a result of two-way analysis of variance on the effects of Er,Cr:YSGG laser irradiation on the bond strength to enamel and dentin, we found that neither the bonding system nor the use of laser irradiation affected the tensile bond strength to enamel, and observed no interactions between the two factors. However, we found that the bonding system and the use of laser irradiation significantly affected the tensile bond strength to dentin, and observed interactions between the two factors. As to the effects of removing denatured dentin on the bond strength to dentin, the tensile bond strength of the RB group was significantly higher than LI, LI＋PA or SE＋PA with GP, and higher than LI or SE＋PA with EB. Based on the results of these experiments on the bond strength of the 1-bottle 1-step bonding systems to the tooth substances after Er,Cr:YSGG laser irradiation, we found that the bond strength to the enamel was favorable after Er,Cr:YSGG laser, but that the bond strength to the dentin was problematic, indicating that further examination on the recovery of bond strength is needed. In addition, removing the denatured layer from the Er,Cr:YSGG laser-irradiated dentin with a round-shaped steel bur effectively recovered the bond strength of the resin composite.
Journal
-
- Journal of Japanese Society for Laser Dentistry
-
Journal of Japanese Society for Laser Dentistry 31 (2), 58-67, 2021
Japanese Society for Laser Dentistry