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目的模拟不同骨质密度的上颌窦区域,植入不同高度羟基磷灰石骨粉后种植体的负载情况,分析种植体骨界面的应力分布情况。方法利用Ansys10.0有限元软件直接绘制奥齿泰种植体及部分上颌骨骨块模型,在牙槽骨表面植入羟基磷灰石骨粉,模拟植骨高度为0、2、4、6mm,建立4组不同模型,在牙槽骨模型上植入4.8mm×8.5mm的种植体,通过对模型施加300N垂直和斜向45°静态载荷,分析比较四组模型在不同骨质密度下,种植体骨界面的应力分布特征。结果位移微动值综合认为植骨4mm为最佳。结论高中低3种松质骨密度下,低密度松质骨中所受应力较大,不利于种植体的稳定及预后。
Objective To simulate the maxillary sinus region with different bone densities, implant the implants with different heights of hydroxyapatite bone powder, and analyze the stress distribution of the implant bone interface. Methods Using Ansys10.0 finite element software, Orthopedic implants and some maxillary bone models were directly drawn. Hydroxyapatite bone powder was implanted into the alveolar bone surface to simulate the bone graft height of 0, 2, 4, and 6 mm. Four groups of different models were implanted with 4.8 mm × 8.5 mm implants on the alveolar bone model. The static load of 300 N vertical and oblique 45 ° was applied to the model. The bone mineral density Stress distribution of bone interface. The results of the translational micro-displacement that bone graft 4mm is the best. Conclusions The high stress, low density cancellous bone under high, middle and low osteoporotic bone densities is not suitable for the stability and prognosis of implants.