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반투명 지르코니아와 리튬디실리케이트 결정화유리의 물성에 관한 문헌고찰

Properties of translucent zirconia and lithium disilicate glass-ceramics: a literature review

김예진|고경호|허윤혁|박찬진|조리라|차민상
대한턱관절교합학회 (Korean academy of stomatognathic function and occlusion)|2022.06|구강회복응용과학지 (Journal of Dental Rehabilitation and Applied Science)|제38권 제2호|pp. 71-80

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참고문헌

키워드

탄성계수modulus of elasticity반투명 지르코니아리튬디실리케이트이트리아연결부 디자인translucent zirconialithium disilicateyttriaconnector design
주제분류치의학

초록

다양한 치과용 도재가 개발되고 있으나 현재 단일구조 보철물로 사용할 수 있는 수준의 기계적, 광학적 성질을 보이는 도재는 반투명 지르코니아와 리튬디실리케이트 결정화유리가 대표적이다. 기계적 성질의 경우 지르코니아가, 광학적 성질은 리튬디실리케이트가 상대적으로 더 우수하다고 알려져 있으나 물성개선을 통해 보다 다양한 증례에 보철물을 적용할 수 있게 되었다. 그 결과 반투명 지르코니아와 리튬디실리케이트 보철물의 적응증이 서로 중복되는 경우가 발생하고 있다. 그러나 두 도재는 유리질(glass matrix) 포함여부뿐만 아니라 강화기전, 탄성계수 등이 서로다르다. 이에 본 문헌고찰에서는 두 단일구조 치과용 도재의 물성을 평가한 다양한 연구결과들을 살펴보고 특히 가공치가 포함된 고정성 보철물의 디자인 시 고려사항에 대해 알아보고자 한다

Abstract

Although low translucency 3 mol% yttria stabilized tetragonal zirconia polycrystal has excellent mechanical properties, it has limited application as a monolithic prosthesis. To improve these optical limitations, translucent zirconia has improved esthetics due to an increase in the cubic phase; however, it is accompanied by a decrease in mechanical properties simultaneously. Lithium disilicate has improved its mechanical properties through crystal size reduction and various heat treatment methods; therefore, its clinical application range is continuously increasing. Translucent zirconia shows a wide distribution of physical properties depending on the yttria content and lithium disilicate according to the size and density of crystal grains. As a result, the indications for translucent zirconia and lithium disilicate are increasing. Therefore, in this literature review, we intend to examine the rationale behind the material selection criteria in clinical situations and considerations for designing fixed dental prostheses including pontic, in particular, by summarizing recent studies.

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