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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。
The authors used the plane finite element method to study the stress distribution in the periodontal support tissues of the second mandibular second molar and the second molar vertically and diagonally. The results of the quantitative analysis were obtained and the stress distribution The graph. It was found that there was tension near the middle of the neck, stress near the middle of the neck, and stress at the tip of the distal tip when the anterior oblique incisor of the canine was occluded. Molar (occlusal) face to withstand near-mid-load, the neck near the compressive stress, far tensile stress; by the oblique distal load, the neck near the tensile stress, distal stress. Bifida and molar (occlusal) face vertical load, then the periodontal support tissue stress distribution is more uniform, this force on the health of the periodontal tissue is beneficial.