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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Stress shielding and fatigue limits of poly-ether-ether-ketone dental implants.
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Stress shielding and fatigue limits of poly-ether-ether-ketone dental implants.

机译：聚醚醚酮牙科植入物的应力屏蔽和疲劳极限。

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摘要

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.
机译：聚醚醚酮（PEEK）聚合物因其生物相容性和低弹性模量而在骨科领域作为钛的替代品备受关注。这项研究评估了PEEK的疲劳极限以及低弹性模量PEEK对现有牙科植入物的影响。使用玻璃纤维增​​强的PEEK（GFR-PEEK），碳纤维增强的PEEK（CFR-PEEK）和钛棒进行压缩载荷测试。在这些测试中，根据ISO 14801进行了GFR-PEEK疲劳测试。为进行有限元分析，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310 N，高于GFR-PEEK的静态抗压强度。与直接与植入物直接接触的骨骼相比，PEEK涂层植入物周围的骨骼显示出更高的SED水平，直径更大，硬度更高的植入物显示出较低的SED水平。 GFR-PEEK和CFR-PEEK植入物的抗压强度分别在前牙和后牙的咬合力范围内，并且PEEK植入物显示出足够的疲劳极限来替代前牙。带有PEEK涂层的牙科植入物和PEEK植入物可能会降低应力屏蔽效果。牙科植入物应用PEEK聚合物的疲劳极限和应力屏蔽。

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