铰链式冠外附着体义齿对支持组织应力分布的影响

Effect of stress distribution of support tissues using hinge extracoronal attachment prostheses

目的:探讨铰链式冠外附着体的临床适用范围。方法:采用有限元应力分析法,分析不同基牙数目时,该附着体义齿支持组织的应力分布情况。结果:基牙和人工牙在正中咬合时,基牙数目对支持组织的应力分布无明显影响,且基牙和牙槽嵴顶黏膜的应力分布均匀。结论:用该附着体修复第二磨牙末端游离缺损时,可采用单基牙。该附着体适用于基牙条件稍差,而牙槽嵴黏膜条件较好的患者。

PURPOSE:The purpose is to discuss the clinical indications of hinge extracoronal attachment. METHODS:In the experiment, the stress distribution in the periodontal support tissue of the abutment was analyzed under different numbers of abutments by EFA. RESULTS: There was no significant effect on the stress distribution in the supporting tissue according to the different numbers of abutments at the central occlusion, and there was an evenly stress distribution in the abutment and alveolar membrane of the area around the missing teeth. CONCLUSIONS: When using the attachment prostheses to restore the type of the second molar distal-extension for the patient, we can use one teeth as abutment. The attachment is suitable for the cases with better condition of the alveolar membrane without high demand of the abutment teeth of the patient.