下颌平面角影响种植体应力分布的正交实验

发布时间：2018-03-19 23:23

  本文选题：下颌骨　切入点：牙种植体　出处：《中国组织工程研究》2017年14期 　论文类型：期刊论文

【摘要】：背景:在临床实践中发现,根据患者下颌平面角选择不同规格的种植体,其长期成功率有所不同,因此有理由设想下颌平面角角度会影响下颌种植体的应力分布,进而影响种植成功率。目的:从下颌平面角角度、下颌骨骨密度以及种植体规格3方面因素对下颌第一磨牙种植体应力分布的力学特性进行正交实验与分析,重点考察下颌平面角对下颌种植体的应力影响规律。方法:针对种植体力学特性问题,此次正交实验涉及3个因素,在影响因素方面确定下颌平面角、种植钉直径、骨密度类型这3个因素,每个因素分别对应3个水平,其中下颌平面角角度分别为14°、22°、34°,种植体直径分别为6.6,8.2,9.6 mm,骨密度类型分别为Ⅱ、Ⅲ、Ⅳ类。根据正交表L9(33)方案将种植体模型植入牙槽骨模型。将不同种植复合体置于力学压力实验机上,压力大小为500 N,其受力结果由应变(应力)数据采集仪进行实时采集。结果与结论:最优参数组合为:下颌平面角为低角,种植体直径为4.8 mm,下颌骨骨密度为Ⅱ型骨。各个因素的主次关系:种植体直径下颌平面角角度骨密度。结果表明,下颌平面角角度对种植体的稳固有一定的影响,在同样咬合力的情况下,高角种植体所受应力最大,其次是均角,低角最小。
[Abstract]:Background: in clinical practice, it is found that the long-term success rate is different according to the mandibular plane angle, so it is reasonable to assume that the mandibular plane angle will affect the stress distribution of mandibular implant. Objective: to analyze the stress distribution of mandibular first molar implant by orthogonal experiment from the angle of mandibular plane angle, bone mineral density of mandible and implant size. Methods: according to the physical characteristics of implant, the orthogonal experiment involved three factors, the angle of mandible plane and the diameter of implant nail were determined in the aspects of influencing factors, such as the angle of mandible plane, the diameter of implant nail, the angle of mandibular plane and the influence of mandibular plane angle on mandibular implant. The three factors of bone mineral density type correspond to three levels, in which the angle of mandibular plane angle is 14 掳, 22 掳掳/ 34 掳, the diameter of implant is 6.6 ~ 8.2 mm, and the type of bone density is 鈪，

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