Propriedades mecânicas do polimetilmetacrilato como base protética

: resina convencional vs resina de impressão 3D : revisão sistemática

Abstract

Introduction: Despite the improvement in oral hygiene care, the number of partially edentulous patients is still prevalent. So, the rehabilitation of the edentulous space, using removable partial dentures is a viable therapeutic option. The synergy between Dentistry and Informatics allowed the appearance of new technologies, specifically 3D printing, which led to the development of new materials to be used in them. Therefore, it is essential and relevant to study its general performance and, particularly, its mechanical characteristics. Thus, it is the aim of this study to compare the mechanical properties of resins for 3D printing with those of conventional resin. Materials and Methods: This systematic review was written using the PRISMA guidelines. A search was carried out in the PubMed / MEDLINE®, Web of Science - MEDLINE® and EMBASE® databases, until April 30th, 2022. Two researchers selected the studies independently. The quality of the papers was assessed using the checklist for quasi-experimental studies (non-randomized Experimental Studies) from JBI and the agreement between examiners was measured using the Cohen's Kappa coefficient. A meta-analysis was performed for the flexural strength. Results: Through the research, 93 articles were identified. The title of 55 articles was analyzed. Among these, 12 were examined by abstract and 10 by full reading. After this selection, 8 articles were eligible for analysis. The 3D printing resin presents, in most studies, lower values of flexural strength and hardness, compared to thermopolymerizable resin. Regarding impact strength, the studies included in this systematic review point lower values in the case of thermopolymerizable resin, compared to 3D printing resin. Conclusion: 3D printing resins are viable materials for making prosthetic bases but need further clinical research.

Date of Award	13 Jul 2022
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	Patrícia Fonseca (Supervisor) & Helena Salgado (Co-Supervisor)