Adaptation accuracy and mechanical properties of various denture base resins: a review

Lee,  Jung-Hwan; Lee,  Chung-Jae; Lee,  Hae-Hyoung

doi:2019.57.12.747

J Korean Dent Assoc > Volume 57(12); 2019 > Article

Journal of Korean Dental Association 2019;57(12):747-756.
DOI: https://doi.org/10.22974/jkda.2019.57.12.003 Published online December 31, 2019.

다양한 레진 의치상의 적합도와 기계적 특성

이정환¹, 이청재², 이해형³

^¹단국대학교 치과대학 생체재료학교실
^²단국대학교 조직재생공학연구소
^³단국대학교 치과대학 생체재료학교실

Adaptation accuracy and mechanical properties of various denture base resins: a review

Jung-Hwan Lee¹, Chung-Jae Lee², Hae-Hyoung Lee³

¹Department of Biomaterials Science, College of Dentistry, Dankook University
²Department of Dental Technology, Shinhan University
³Department of Biomaterials Science, College of Dentistry, Dankook University

Abstract

This paper reviews the adaptation accuracy and mechanical properties of currently used denture processing systems with base resin materials and introduces the latest research on the development of antimicrobial denture base resins. Poly(methyl methacrylate) has been successfully used as a dental denture base resin material by the compress-molding method and heat polymerization for a long time, but recently, new processing techniques, injection molding-methods or fluid-resin technique are also used for fabricating denture base. However, studies indicated that there was no difference between the injectionmolding and the conventional compression-molding method in terms of adaption accuracy of denture base. The fluid-resin fabrication and one injection-molding systems exhibited better adaptation accuracy than the other processing methods. Resin denture bases in the oral cavity may undergo midline fractures due to flexural fatigue from repeated masticatory loading. For those patients, impact resistant denture base resins are recommended to prevent denture fracture during service. Thermoplastic denture base resins can be helpful for patients suffering from allergic reaction to resin monomers with a soft-fit, however, thermoplastic resins with low stiffness can irritate gum tissues and accelerate abnormal alveolar ridge resorption. Moreover, due to low chemical durability in oral cavity, those should be used for a limited period of time.

Key Words: denture base resin;adaptation accuracy;mechanical properties;compression molding technique;injection molding technique;fluid resin system;thermoplastic resin;