Carneiro Bruno Albuquerque, de Brito Rui Barbosa, França Fabiana Mantovani Gomes
São Leopoldo Mandic School of Dentistry, Campinas, São Paulo, Brazil.
J Oral Implantol. 2014 Apr;40(2):161-8. doi: 10.1563/AAID-JOI-D-11-00188.
The use of provisional resin implant-supported complete dentures is a fast and safe procedure to restore mastication and esthetics of patients soon after surgery and during the adaptation phase to the new denture. This study assessed stress distribution of provisional implant-supported fixed dentures and the all-on-4 concept using self-curing acrylic resin (Tempron) and bis-acrylic resin (Luxatemp) to simulate functional loads through the three-dimensional finite element method. Solidworks software was used to build three-dimensional models using acrylic resin (Tempron, model A) and bis-acrylic resin (Luxatemp, model B) for denture captions. Two loading patterns were applied on each model: (1) right unilateral axial loading of 150 N on the occlusal surfaces of posterior teeth and (2) oblique loading vector of 150 N at 45°. The results showed that higher stress was found on the bone crest below oblique load application with a maximum value of 187.57 MPa on model A and 167.45 MPa on model B. It was concluded that model B improved stress distribution on the denture compared with model A.
使用临时树脂种植体支持的全口义齿是一种快速且安全的方法，可在手术后不久以及患者适应新义齿的阶段恢复其咀嚼功能和美观。本研究采用三维有限元方法，评估了使用自凝丙烯酸树脂（Tempron）和双丙烯酸树脂（Luxatemp）模拟功能负荷时，临时种植体支持的固定义齿和All-on-4概念的应力分布情况。使用Solidworks软件，用丙烯酸树脂（Tempron，模型A）和双丙烯酸树脂（Luxatemp，模型B）构建用于义齿基托的三维模型。在每个模型上施加两种加载模式：（1）在后牙咬合面上施加150 N的右侧单侧轴向载荷；（2）以45°角施加150 N的斜向载荷向量。结果表明，在斜向载荷作用下，牙槽嵴上的应力较高，模型A的最大值为187.57 MPa，模型B的最大值为167.45 MPa。得出的结论是，与模型A相比，模型B改善了义齿上的应力分布。
