论文部分内容阅读
采用ＣＴ－数字化仪－ＣＡＤ系统建立下颌无牙颌骨及其义齿的３个三维有限元模型，探讨在力、口周肌力作用下，下颌人工牙排列位置对义齿固位和支持组织应力分布的影响，并测量了１０例口周肌动力型及传统型全口义齿人工牙排列位置的差异。结果表明：力作用下，人工牙排列于剩余牙槽嵴顶及水平偏离牙槽嵴顶舌、颊侧３ｍｍ，对牙槽骨应力分布无明显影响，但后牙位于下颌骨外斜嵴区对支持组织有利；正中时，磨牙排列于牙槽嵴顶颊侧３ｍｍ以内可增强义齿固位，而口周肌力作用下，磨牙水平偏移牙槽嵴顶颊侧３ｍｍ，前磨牙水平偏移舌侧３ｍｍ对义齿固位起增强作用；肌动力型下颌全口义齿磨牙区牙列弓宽于传统型，而前磨牙区窄于传统型
Three three-dimensional finite element models of mandible and denture with CT-digitizer-CAD system were established to investigate the effect of mandibular artificial teeth on denture retention and supportive tissue stress Distribution of the impact and measured 10 cases of perioral muscle dynamic type and traditional full denture artificial tooth arrangement position differences. The results show that the artificial teeth are arranged on the crest of the remaining alveolar ridge and the level of the alveolar ridge top and the buccal side of the tongue 3 mm, which have no significant effect on the stress distribution of the alveolar bone. However, the posterior teeth are located in the outer ridges of the mandible Right midrib, molars arranged in the buccal crest of alveolar crest within 3mm can enhance the denture retention, and perioral muscle strength, the molar level off the alveolar crest on the buccal side of 3mm, premolar horizontal deviation 3mm away from the lingual side enhanced the retention of the denture. The dentition arch of the muscular powered mandibular complete denture was wider than the traditional one, while the premolar area was narrower than the traditional one