摘要： 目的：纳米氟磷灰石聚醚醚酮（nFA/PEEK）是我国自主研发的复合种植体材料，本研究以三维有限元方法，分析该材料种植体静态载荷下应力分布特点。方法：建立下颌第一磨牙区的局部骨块、nFA/PEEK和钛合金（Ti6Al4V）种植体全瓷冠修复的三维有限元模型，运用软件分析施力方向分别为垂直向、近远中向、颊舌向的180 N及240 N静态载荷下，对比2种材料种植体本身及其在骨内的应力分布状况。结果：基台应力以颊舌向加载受力>垂直加载受力>近远中加载受力，nFA/PEEK材料比对应Ti6Al4V材料低4.2倍。nFA/PEEK应力集中于颈部1/3处，并小于对应Ti6Al4V材料。应力围绕在种植体周围骨颈部的10 mm范围内，同一载荷下，应力随载荷增加而增大，且nFA/PEEK材料均高于对应Ti6Al4V材料。种植体周围骨的等效应力基本位于20~60 Mpa。240 N垂直向加载下Ti6Al4V材料的应力>180 N近远中向和垂直向加载的nFA/PEEK材料应力>240 N颊舌向加载钛合金的应力。结论：生理静态载荷下，nFA/PEEK种植体不易折断，能降低应力遮挡，有利于骨皮质骨生长沉积，是有潜在应用前景的种植体材料。
关键词:
牙种植体； ,
nFA/PEEK； ,
下颌第一磨牙； ,
应力分布； ,
有限元分析
Abstract: Objective: To analyze distribution of stress surrounding poly-ether-ether-ketone bio-composited by nano-fluorapatite (nFA/PEEK) dental implant under static loading. Methods: A 3-D mandible bone first molar region segment was modeled, nFA/PEEK and titanium alloy implants were established. Three-dimensional finite element analysis method was simulated to check distribution of stress under 180 N and 240 N static loadings, which were decomposed into vertical, buccolingual and mesiodistal directions. Results: Stress around implant abutment of buccolingual stress was higher than that of vertical and mesiodistal, which nFA/PEEK was 4.2 times lower than that of corresponding Ti6Al4V. Stress of nFA/PEEK was concentrated at the 1/3 neck area, which was less than Ti6Al4V. Stress of nFA/PEEK implant bone bed were located in 10 mm areas around the neck, which was higher than that of Ti6Al4V. Von-mises value calculated between 20~60 Mpa were found in a sorted as 240 N vertical Ti6Al4V>180 N mesiodistal or 240 buccolingual nFA/PEEK>240 N vertical Ti6Al4V>180 N buccolingual and 240 N nFA/PEEK>240 N vertical nFA/PEEK. Conclusion: nFA/PEEK in abutment is not easy to be broken under physiological masticatory force. A higher nFA/PEEK bone stress calculated between 20~60 MPa is reduced in extent of stress shielding effect, which is beneficial to cortical bone deposition and is potentially a promising implant material.
Key words:
dental implants,
nFA/PEEK,
mandibular first molar,
stress distribution,
finite element analysis
中图分类号:
甘露1，魏杰2，王冬梅3，马健1. 模拟咀嚼静态载荷nFA/PEEK牙种植体周应力分布特点[J]. 《口腔颌面外科杂志》, 2015, 25(5): 341-.
GAN Lu1, WEI Jie2, WANG Dong-mei3, MA Jian1. Distribution of Stress of nFA/PEEK Biomaterials in Dental Implant[J]. 《Journal of Oral and Maxillofacial Surgery》, 2015, 25(5): 341-.