聚醚醚酮夹板条不同横截面在上颌All-on-4种植体支持临时修复体中的作用：有限元分析研究

Effect of different cross sections of polyetheretherketone splinting bars in maxillary All-on-4 implant supported interim prosthesis: finite element analysis study.

作者信息

Abdelrahman Rana Mohammad, Abdelfattah Ahmed Mostafa, Kothayer Marwa

机构信息

Oral and Maxillofacial Prosthodontics Department, School of Dentistry, Newgiza University, Giza, Egypt.

Oral and Maxillofacial Prosthodontics Department, Faculty of Dentistry, AinShams University, Organization of African Unity Street, Cairo, 11561, Egypt.

出版信息

BMC Oral Health. 2025 Jul 28;25(1):1268. doi: 10.1186/s12903-025-06542-w.

DOI:10.1186/s12903-025-06542-w

PMID:40721792

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12302677/

Abstract

BACKGROUND

All-on-4 concept allows the immediate rehabilitation of edentulous arches having anatomical limitations with provisional restoration. However, the acrylic provisional prosthesis has a critical liability to fracture, that's why a reinforcement with splinting bar is a good solution for a longer-term success. Poly Ether Ether ketone has been used as a splinting material since they are biocompatible with an elastic modulus similar to native bone and dentin with shock-absorbing characteristics. The purpose of this study was to evaluate the effect of different cross sections of Poly Ether Ether ketone splinting bars in maxillary All-on-4 implant supported interim prosthesis.

METHODS

The current study involved two steps: virtual model construction and three-dimensional Finite Element Analysis. The virtual model composed of an edentulous maxillary cast, four dental implants placed according to the All-on-4concept and an acrylic prosthetic superstructure reinforced with Poly Ether Ether ketone bar. Two virtual models were made. In the virtual model RB, a Poly Ether Ether ketone bar with rounded cross section was used. However, in the virtual model SB, a square bar was used. Each model was subjected to two types of loads: vertical load and oblique load. Each model was analyzed, and the stresses displayed in the current study are the von-Mises stress (SEqv) for the implants, marginal part of the bone cylinder, Poly Ether Ether ketone bar, prosthesis and the entire model.

RESULTS

Higher stress values were observed in the model RB compared to the model SB in the implants, peri-implant bone and overlying prosthetic superstructure. However, higher stress values were recorded for the splinting bar in the model SB compared to the RB one. The highest recorded value in model RB was 120.26 MPa which recorded in the prosthetic superstructure during unilateral oblique loading while the highest recorded value in model SB model was 110.51 MPa which recorded in the posterior implant during unilateral oblique loading.

CONCLUSION

Square cross sectioned Poly Ether Ether ketone bar induce less stress in All-On-4 Implant Supported Interim Prosthesis compared to the round one.

摘要

背景

全口4颗种植体理念允许对存在解剖学限制的无牙颌弓进行即刻修复并使用临时修复体。然而，丙烯酸临时修复体极易发生骨折，因此使用夹板杆进行加固是实现长期成功的良好解决方案。聚醚醚酮已被用作夹板材料，因为它们具有生物相容性，其弹性模量与天然骨和牙本质相似，具有减震特性。本研究的目的是评估聚醚醚酮夹板杆不同横截面在上颌全口4颗种植体支持的临时修复体中的效果。

方法

本研究包括两个步骤：虚拟模型构建和三维有限元分析。虚拟模型由无牙上颌模型、根据全口4颗种植体理念植入的4颗牙种植体以及用聚醚醚酮杆加固的丙烯酸修复体上部结构组成。制作了两个虚拟模型。在虚拟模型RB中，使用了横截面为圆形的聚醚醚酮杆。然而，在虚拟模型SB中，使用了方形杆。每个模型承受两种类型的载荷：垂直载荷和斜向载荷。对每个模型进行分析，本研究中显示的应力是种植体、骨圆柱体边缘部分、聚醚醚酮杆、修复体和整个模型的冯·米塞斯应力（SEqv）。

结果

与模型SB相比，模型RB在种植体周围骨组织和覆盖的修复体上部结构中观察到更高的应力值。然而，与模型RB相比，模型SB中夹板杆的应力值更高。模型RB中记录的最高值为120.26MPa，在单侧斜向加载期间记录于修复体上部结构中，而模型SB中记录到的最高值为110.51MPa，在单侧斜向加载期间记录于后部种植体中。