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首页> 外文期刊>Computer methods in biomechanics and biomedical engineering >Influence of transmucosal height in abutments of single and multiple implant-supported prostheses: a non-linear three-dimensional finite element analysis
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Influence of transmucosal height in abutments of single and multiple implant-supported prostheses: a non-linear three-dimensional finite element analysis

机译：跨粘膜高度对单个和多个植入物支撑的假体基台的影响：非线性三维有限元分析

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摘要

The aim of this study was to analyze the influence of three different transmucosal heights of the abutments in single and multiple implant-supported prostheses through the finite element method. External hexagon implants, MicroUnit, and EsthetiCone abutments were scanned and placed in an edentulous maxillary model obtained from a tomography database. The simulations were divided into two groups: (1) one implant with 3.75x10mm placed in the upper central incisor, simulating a single implant-supported fixed prosthesis with an EsthetiCone abutment; and (2) two implants with 3.75x10mm placed in the upper lateral incisors with MicroUnit abutments, simulating a multiple implant-supported prosthesis. Subsequently, each group was subdivided into three models according to the transmucosal height (1, 2, and 3mm). A static oblique load at an angle of 45 degrees to the long axis of the implant in palatal-buccal direction of 150 and 75N was applied for multiple and single implant-supported prosthesis, respectively. The implants and abutments were assessed according to the equivalent Von Mises stress analyses while the bone and ceramics were analyzed through maximum and minimum principal stresses. The total deformation values increased in all models, while the transmucosal height was augmented. The transmucosal height of the abutments influences the stress values at the bone, ceramics, implants, and abutments of both the single and multiple implant-supported prostheses, with the transmucosal height of 1mm showing the lowest stress values.
机译：这项研究的目的是通过有限元方法分析三种和不同的黏膜高度对单个和多个植入物支撑的假体基台的影响。扫描外部六角形种植体，MicroUnit和EsthetiCone基台，并将其放置在从断层扫描数据库获得的无牙上颌模型中。模拟分为两组：（1）一个植入物，其3.75x10mm放置在上中切牙中，模拟了一个具有EsthetiCone基台的单个植入物支撑的固定假体； （2）将两个3.75x10mm的植入物放置在带有MicroUnit基台的上侧切牙中，以模拟由多个植入物支撑的假体。随后，根据透粘膜高度（1、2和3mm）将每组细分为三个模型。分别以150和75N的-颊方向相对于种植体长轴成45度角的静态斜向载荷施加到多个和单个种植体支撑的假体上。根据等效的冯·米塞斯应力分析评估植入物和基台，同时通过最大和最小主应力分析骨骼和陶瓷。在所有模型中，总变形值均增加，而跨粘膜高度增加。基台的跨粘膜高度影响单个和多个植入物支撑的假体在骨头，陶瓷，植入物和基台上的应力值，其中1mm的跨粘膜高度显示最低的应力值。

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