Effect of Nd:YAG laser irradiation on adherence of retrograde filling materials: evaluation by micro-computed tomography
김민영, 김현철, 곽상원, 윤태철, 김의성,
소속 상세정보
김민영 ( Kim Min-Young ) - 연세대학교 치과대학 치과보존학교실
김현철 ( Kim Hyeon-Cheol ) - 부산대학교 치의학전문대학원 치과보존학교실
곽상원 ( Kwak Sang-Won ) - 부산대학교 치의학전문대학원 치과보존학교실
윤태철 ( Yoon Tai-Cheol ) - 국민건강보험공단 일산병원 치과보존과
김의성 ( Kim Eui-Seong ) - 연세대학교 치과대학 치과보존학교실
KMID : 0362720160540110865
Abstract
Background/Purpose: The purpose of this study was to evaluate the effect of Nd:YAG irradiation on adherence of retrograde filling materials (mineral trioxide aggregate [MTA] and Super-EBA) by micro-computed tomography (CT) measurement and to observe the dentinal surface after irradiation by scanning electron microscopy (SEM).
Materials and methods: Forty retrofilling models using extracted human teeth were divided into four groups according to the material and method used: ProRoot MTA (MTA group), Super-EBA (EBA group), MTA with Nd:YAG laser irradiation (LMTA group), and Super-EBA with Nd:YAG laser irradiation (LEBA group). All specimens were stored in 100% humidity for 24 hours until micro-CT was performed. The gap volume of the tooth/material interface was measured using the CTAn program. In six samples, the laser-irradiated dentin surface was observed using SEM.
Results: The mean percent difference in gap volume was not statistically significant between the Nd:YAG laser-irradiated
groups and non-irradiated in both materials(P > 0.05). The gap volume in the MTA group was significantly lower than that in the EBA group (P < 0.05). Examination of the non-irradiated specimens by SEM showed patent dentinal tubules. In contrast, alterations in the texture of the dentin surface and obliteration of the dentinal tubules were evident in the Nd:YAG laser-irradiated specimens.
Conclusion: In this study, changes in the dentinal surface after Nd:YAG irradiation did not affect adherence between the apical filling material and the dentin wall.
키워드
apical seal; dentinal surface; laser device; microleakage; surgical endodontics; retrofill
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