의치상 레진의 표면 전처리가 연성 이장재와의 인장결합강도에 미치는 영향
EFFECT OF DENTURE BASE SURFACE PRETREATMENTS ON THE TENSILE BOND STRENGTH BETWEEN A RESILIENT LINER AND A PROCESSED DENTURE BASE RESIN
윤민철, 전윤경, 전유진,
소속 상세정보
윤민철 ( Yoon Min-Chul ) - 부산대학교 치과대학 치과보철학교실
전윤경 ( Jeon Yun-Kyung ) - 부산대학교 치과대학 치과보철학교실
전유진 ( Jeon You-Jin ) - 부산대학교 치과대학 치과보철학교실
KMID : 0362420070450050621
Abstract
Statement of Problem: The failure of adhesion between the resilient denture liner and the denture base is a serious problem in clinic.
Purpose: The purpose of this study was to evaluate the effect of denture base resin surface pretreatments (mechanical and/or chemical) on the tensile bond strength between a resilient liner and processed denture resin.
Material and method. Acrylic-based resilient liners (Soft liner; GC co., Japan & Coe-Soft; GC America Inc. USA) and silicone-based resilient liners (Mucosoft, Parkell Inc.USA & Dentusil; Bosworth co., USA) were used. Specimens in each soft lining material were divided two groups with or without mechanical pretreatment. Each denture base specimen received 1 of 4 chemical pretreatments including: (1) no treatment, (2) 30-s acetone treatment, (3) 15-s methylene chloride treatment, (4) 180-s methyl methacrylate treatment. All specimens were thermocycled and placed under tension until failure in a universal testing machine.
Results: 1. Silicone-based resilient liners exhibited significantly higher tensile bond strengths than acrylic-based resilient liners (P<.05). 2. Grinding the denture base resin improved tensile bond strengths of silicone-based resilient liners, but reduced tensile bond strengths of acrylic-based resilient liners (P<.05). 3. In acrylic-based resilient liners, treating with acetone significantly increased the bond strength of Soft liner and treating with methyl methacrylate significantly increased the bond strength of Coe-Soft (P<.05). However they were not effective compared to silicone-based resilient liner. 4. In silicone-based resilient liners, treating with all chemical etchants significantly increased the bond strength of Mucosoft to denture base, and treating with methylene chloride and methyl methacrylate increased the bond strength of Dentusil to denture base (P<.05).
Conclusion:Although chemical and mechanical pretreatments were not effective on tensile bond strength of acrylic-based resilent liner to denture base, treating the denture base resin surface with appropriate chemical etchants after mechanical pretreatment significantly increased the tensile bond strength of silicone-based resilient liner to denture base.
키워드
Resilient liner;Denture base resin;Mechanical pretreatment;Chemical pretreatment
원문 및 링크아웃 정보
등재저널 정보