Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea.
J Biomed Mater Res B Appl Biomater. 2012 May;100(4):1044-52. doi: 10.1002/jbm.b.32669. Epub 2012 Feb 14.
The poly-ether-ether-ketone (PEEK) polymer is of great interest as an alternative to titanium in orthopedics because of its biocompatibility and low elastic modulus. This study evaluated the fatigue limits of PEEK and the effects of the low elastic modulus PEEK in relation to existing dental implants. Compressive loading tests were performed with glass fiber-reinforced PEEK (GFR-PEEK), carbon fiber-reinforced PEEK (CFR-PEEK), and titanium rods. Among these tests, GFR-PEEK fatigue tests were performed according to ISO 14801. For the finite element analysis, three-dimensional models of dental implants and bone were constructed. The implants in the test groups were coated with a 0.5-mm thick and 5-mm long PEEK layer on the upper intrabony area. The strain energy densities (SED) were calculated, and the bone resorption was predicted. The fatigue limits of GFR-PEEK were 310 N and were higher than the static compressive strength of GFR-PEEK. The bone around PEEK-coated implants showed higher levels of SED than the bone in direct contact with the implants, and the wider diameter and stiffer implants showed lower levels of SED. The compressive strength of the GFR-PEEK and CFR-PEEK implants ranged within the bite force of the anterior and posterior dentitions, respectively, and the PEEK implants showed adequate fatigue limits for replacing the anterior teeth. Dental implants with PEEK coatings and PEEK implants may reduce stress shielding effects. Dental implant application of PEEK polymer-fatigue limit and stress shielding.
聚醚醚酮（PEEK）聚合物作为骨科中钛的替代品具有很大的吸引力，因为它具有生物相容性和低弹性模量。本研究评估了 PEEK 的疲劳极限以及与现有牙科植入物相关的低弹性模量 PEEK 的影响。使用玻璃纤维增强聚醚醚酮（GFR-PEEK）、碳纤维增强聚醚醚酮（CFR-PEEK）和钛棒进行压缩加载测试。在这些测试中，根据 ISO 14801 进行 GFR-PEEK 疲劳测试。对于有限元分析，构建了牙科植入物和骨骼的三维模型。测试组中的植入物在上部骨内区域涂有 0.5 毫米厚和 5 毫米长的 PEEK 层。计算应变能密度（SED），并预测骨吸收。GFR-PEEK 的疲劳极限为 310N，高于 GFR-PEEK 的静态压缩强度。PEEK 涂层植入物周围的骨骼显示出比与植入物直接接触的骨骼更高水平的 SED，而直径更宽和刚性更高的植入物显示出更低水平的 SED。GFR-PEEK 和 CFR-PEEK 植入物的抗压强度分别在前后牙的咬合力范围内，PEEK 植入物具有足够的疲劳极限，可以替代前牙。具有 PEEK 涂层和 PEEK 植入物的牙科植入物可能会降低应力屏蔽效应。PEEK 聚合物-疲劳极限和应力屏蔽在牙科植入物中的应用。
