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作者采用准三维光弹法对5个Branemark种植体支持的全下颌种植固定义齿支持组织的应力分布进行研究。从不同游离臂长度和载荷的实验结果显示,末端种植体远中面的牙槽嵴顶产生最大压应力,种植体底部远中骨组织产生拉应力和压应力,游离臂长度的增加,种植体所受应力不成比例的增加,这种影响将导致种植体间应力再分布。当在距末端种植体10mm,20mm游离骨上施以89N(牛顿)载荷时,其应力分布相似。最大应力集中在远中种植体的远中牙嵴顶上,中间
The author used quasi-3D photoelastic method to study the stress distribution of the mandibular implant-supported denture supported by five Branemark implants. The experimental results of different free arm lengths and loads show that the maximal compressive stress is generated at the alveolar ridge distal to the distal end implant. Tensile stress and compressive stress are generated in the far and middle bone at the bottom of the implant, and the free arm length is increased. The disproportionate increase in stress, this effect will lead to stress redistribution between implants. The stress distribution was similar when a 89 N (Newtonian) load was applied to a 10 mm, 20 mm free bone from the end implant. The maximum stress concentration in the distal midline distal crest of the implant, the middle