摘要
作者采用平面有限单元法,对下颌第二双尖牙、第二磨牙垂直向和斜向受载时牙周支持组织的应力分布进行了研究,得到了定量分析的结果,并绘出了应力分布的曲线图。发现:双尖牙(牙合)面斜向受载时出现颈部近中受拉应力,颈部远中受压应力,以及根尖远端应力较集中。磨牙(牙合)面承受斜向近中载荷时,颈部近中受压应力,远中受拉应力;受斜向远中载荷时,颈部近中受拉应力,远中受压应力。双尖牙及磨牙(牙合)面受垂直向载荷时,则牙周支持组织应力分布较均匀,这种力对牙周组织的健康是有利的。
Recently, the finite element method hasbeen adopted in the study of tooth structureas wull as the stress distribution of dentalprosthesis.In order to understand the load-ing state of the supporting tissues and thestress distrbution of the teeth in variousshapes under the pressure of loading, theauthor of this essay has applied the two-dimensional finite element method to thestudy of the stress distribution of the peri-odontal supporting tissues at the time whenthe second bicuspid and the second molarare vertically and obliquely loaded. Finally,the results of the quantitative analysis areobtained and a curve of the stress distribu-tion of the teeth is also drawn up. The conclusion is as follows: 1.When the vertical loading is appliedto the occlusal surface of the bicuspid andmolar, the stress distribution of periodontalsupporting tissues is uniform. 2.The stress concentration is on themarginal ridge and thedistal apex of bicuspidunder the oblique loading. 3.When the oblique loading is applied tothe occlusal surface of the molar, the stressconcentration is only on the marginal ridge.and it is small.
出处
《华西医科大学学报》
CAS
CSCD
1989年第3期311-314,共4页
Journal of West China University of Medical Sciences
基金
四川省卫生厅资助
