摘要
作者用平面有限单元法,对下颌第一磨牙缺失的固定桥进行七种垂直向和两种斜向受载的基牙牙槽骨的应力分布进行了研究,得出定量分析的结果,并绘出牙周组织应力值的曲线图。作者认为:①从固定桥的七种垂直受载情况看,均为第二双尖牙根尖的近中部受到较大的压应力。以两个基牙和桥体同时受载时,应力为最大,σ_2为-120.0,而磨牙牙周组织应力分布较均匀。②固定桥桥体受斜向载荷时,双尖牙根尖的近中部受拉应力和压应力,以压应力为最大,σ_2为-75.0。③磨牙是固定桥的理想基牙。
The fixed bridge is a common prosthesiswidely used in clinical dentistry. In order todesign an ideal fixed bridge which canprovide the best protection of the abut-ments, we must study the stress distribu-tion of alveolar bone, when the fixed bridgeis under the loading. In this article, we report the applica-tion of the finite element method to exa-mine the stress distribution of the alveolarbone of fixed bridge abutments. We havemade seven vertical loading models and twooblique loading models. A quantitativeanalysis result has been obtained and thestress distribution result drawn up by acomputer. The results of this analysis are asfollows: 1. Under the seven vertical loadings, thebearing compress stress on the mesial apexof the second bicuspid is large.In this areathe compress stress is largest, when thevertical loading is applied on the two-abutment tooth and pontic, the σ_2 is-120.0 but the stress of alveolar bone of themolar iS uniform. 2.Under the oblique loading, by themesial apex of bicuspid are borne the ten-sile stress and compress stress, the latter islarger than the former, and theσ_2 is-75.0. 3.The molar is an ideal abutment toothfor the fixed bridge.
出处
《华西医科大学学报》
CAS
CSCD
1989年第4期392-395,共4页
Journal of West China University of Medical Sciences
基金
四川省卫生厅科学基金
