不同修复冠和定制基台材料对单颗种植体及其周围骨体中应力分布的影响：一项三维有限元分析研究。

Effect of different restorative crown and customized abutment materials on stress distribution in single implants and peripheral bone: A three-dimensional finite element analysis study.

机构信息

Researcher, Department of Prosthodontics, Faculty of Dentistry, University of Ondokuz Mayis, Samsun, Turkey.

Chief and Professor, Department of Prosthodontics, Faculty of Dentistry, University of Ondokuz Mayis, Samsun, Turkey.

出版信息

J Prosthet Dent. 2018 Mar;119(3):437-445. doi: 10.1016/j.prosdent.2017.03.008. Epub 2017 Jun 20.

DOI:10.1016/j.prosdent.2017.03.008

PMID:28645667

Abstract

STATEMENT OF PROBLEM

In recent years, the use of resin-matrix ceramics and polyetheretherketone (PEEK) abutments has been suggested to absorb excessive stresses on dental implants. However, only a few studies have evaluated the effect of these materials on stress distribution in implants and peripheral bone structure.

PURPOSE

The purpose of this finite element analysis was to evaluate the biomechanical behaviors of resin-matrix ceramics and PEEK customized abutments in terms of stress distribution in implants and peripheral bone.

MATERIAL AND METHODS

Three-dimensional (3D) models of a bone-level implant system and a titanium base abutment were created by using the standard tessellation language (STL) data of original implant components. An anatomic customized abutment and a maxillary right second premolar crown were then modeled over the titanium base abutment. A bone block representing the maxillary right premolar area was created, and the implant was placed in the bone block with 100% osseointegration. Six different models were created according to combinations of restoration materials (translucent zirconia [TZI], lithium disilicate glass ceramic [IPS], polymer-infiltrated hybrid ceramic [VTE]), and customized abutment materials (PEEK and zirconia). In each model, the implants were loaded vertically (200 N) and obliquely (100 N). The stress distribution in the crown, implant, and abutments was evaluated through the von Mises stress analysis, and the stress distribution in the peripheral bone was examined through the maximum and minimum principal stress analyses.

RESULTS

The oblique load resulted in high stress values in the implant components, restorative crown, and cortical bone. Low stress values were observed in the VTE crowns. Zirconia customized abutments exhibited higher stress values than PEEK customized abutments. The stress distributions in the implant and peripheral bone were similar in all models.

CONCLUSIONS

Changes in restoration and customized abutment material did not affect stress distribution in the implant and peripheral bone.

摘要

问题陈述

近年来，有人建议使用树脂基质陶瓷和聚醚醚酮（PEEK）基台来吸收种植牙上的过度应力。然而，只有少数研究评估了这些材料对种植体和周围骨结构中应力分布的影响。

目的

本有限元分析的目的是评估树脂基质陶瓷和 PEEK 定制基台在种植体和周围骨的应力分布方面的生物力学行为。

材料和方法

使用原始种植体组件的标准网格语言（STL）数据创建了骨水平种植体系统和钛基台的三维（3D）模型。然后在钛基台上制作解剖定制基台和上颌右侧第二前磨牙冠。创建了一个代表上颌右侧前磨牙区域的骨块，并将种植体放置在骨块中，实现 100%的骨整合。根据修复材料（半透明氧化锆[TZI]、锂二硅酸玻璃陶瓷[IPS]、聚合物渗透混合陶瓷[VTE]）和定制基台材料（PEEK 和氧化锆）的组合，创建了六个不同的模型。在每个模型中，垂直（200N）和倾斜（100N）加载种植体。通过 von Mises 应力分析评估冠、种植体和基台的应力分布，通过最大和最小主应力分析检查周围骨的应力分布。