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Methacrylate 기질 복합레진과 Silorane 기질 복합레진의 치아 수복 시 중합수축응력거동

Behavior of Polymerization Shrinkage Stress of Methacrylate-based Composite and Silorane-based Composite during Dental Restoration

박정훈|최낙삼
한국복합재료학회 (The Korean Society For Composite Materials)|2015.02|Composites Research|제28권 제1호|pp. 6-14

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참고문헌

키워드

중합수축유한요소법Finite element methodDental restoration치아수복Methacrylate 기질 복합레진Silorane 기질 복합레진스트레인게이지법Methacrylate-based composite resinSilorane-based composite resinPolymerization ShrinkageStrain-gage method
주제분류재료공학

초록

치아의 수복에 사용되는 재료인 Methacrylate 기질 복합레진(Clearfil AP-X)과 Silorane 기질 복합레진(FiltekP90)을 대상으로 스트레인게이지법과 FEM 분석법으로 중합수축응력거동을 분석하였다. 또한 복합레진의 탄성계수와 수축변형률을 중합수축응력과 관계시켜 이론식을 제시하고 이 식의 계산결과와 FEM 분석법의 결과를 비교하였다. 스트레인 게이지법으로 측정한 결과, 중합수축응력의 최대값은 Clearfil AP-X가 Filtek P90 보다 약 2.8배 높게 나타났다. FEM 분석 결과, Von-Mises 응력은 복합레진 수복재와 PMMA 링사이의 계면부에서 최대로 되었으며 시편표면의 계면부가 내부보다 응력집중이 더 컸음을 알았다. 예측식을 통한 반경 방향의 수축응력은 평면응력상태의 FEM 분석법을 통한 값과 비교하여 오차 5% 이내로 정확했음을 확인하였다.

Abstract

Polymerization shrinkage stress analysis of dimethacrylate-based composite (Clearfil AP-X, Kuraray) andsilorane-based composite (Filtek P90, 3M ESPE) used for dental composite restorations was performed using straingagemeasurement and FEM analysis. A theoretical equation based on Young’s modulus and polymerization shrinkageof the composite resin was proposed to predict the polymerization shrinkage stress. Experimental results showed thatthe maximum shrinkage stress of Clearfil AP-X was about 2.8 times higher than Filtek P90. FEM analysis agreed withsuch experimental stress behaviours and showed that the maximum Von-Mises stress appeared near the margin of thefilled resin adhered with PMMA ring. The stress concentration at the interface on the specimen surface was higherthan that in the interior. The maximum error of shrinkage stress by the theoretical equation was reasonable within 5%in comparison to FEM results under plane stress.

참고문헌 (22)

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