种植体倾斜和长度对萎缩下颌骨单牙修复生物力学的影响

IF 0.5 Q4 DENTISTRY, ORAL SURGERY & MEDICINE
E. Anitua, Naiara Larrazabal Saez de Ibarra, Iñigo Morales Martín, Luis Saracho Rotaeche
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引用次数: 1

摘要

本研究的目的是通过有限元模型评估种植体长度和倾斜对单单元种植体修复中骨应力的影响。本研究分析的因素包括种植体长度(4.5、5.5和10mm)、种植体倾斜(0、17°、30°和45°)、骨类型(0/I、II和III)和加载(即时和延迟)。在假体咬合面11 mm高度处施加200 N轴向载荷,分析骨内Von Mises等效应力。有限元分析表明,种植体倾斜是影响种植体倾斜的主要因素。将种植体倾斜17°,使骨接受的Von Mises应力增加一倍。种植体倾斜45°时增加最多(增加1300%)。超短种植体的使用并未显著增加骨内Von Mises应力。此外,种植体长度对I型和II型骨的应力值没有影响。基于所获得的结果,从生物力学的角度来看,轴向放置的短种植体将比标准长度种植体更好地支持萎缩下颌骨的冠修复。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Implant Tilting and Length on the Biomechanics of Single-Tooth Restoration: A Finite Element Analysis in Atrophic Mandible
The aim of the present study is to assess by means of finite element models the effect on bone stresses of implant length and tilting in single-unit implant restorations. The factors that were analyzed in this study were implant length (4.5, 5.5, and 10 mm), implant titling (0, 17°, 30°, and 45°), bone type (0/I, II, and III), and loading (immediate and delayed). An axial load of 200 N was applied to the occlusal surface of the prosthesis at a height of 11 mm and the Von Mises equivalent stress in the bone was analyzed. Finite element analysis indicated that the most determinant factor was implant tilting. Tilting the implant by 17° doubled the Von Mises stress received by bone. The highest increase was in the case of implant tilting at 45° (by 1300%). The use of extra-short implants did not produce a significant increase in Von Mises stress in bone. Moreover, the length of the implant did not affect the stress value in bone types I and II. Based on the obtained results, an axially placed short implant would be a better option than titling a standard-length implant to support a crown restoration in an atrophic mandible from a biomechanical point of view.
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来源期刊
Open Dentistry Journal
Open Dentistry Journal DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
2.00
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86
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