Tekin Samet, Adiguzel Ozkan, Cangul Suzan, Atas Osman, Erpacal Begum
Department of Prosthodontics, Faculty of Dentistry, Firat University Elazig, Turkey.
Department of Endodontics, Faculty of Dentistry, Dicle University, Diyarbakir, Turkey.
Am J Dent. 2020 Oct;33(5):251-257.
To compare the stresses generated after the use of low elastic modulus polyetheretherketone (PEEK) as dental post and crown material with glass fiber post and metal supported ceramic crowns using finite element analysis.
First an image of a maxillary central incisor taken on micro-computed tomography (micro-CT) was uploaded to a computer program. Modeling was made of all the materials in the computer environment and 3-dimensional (3D) virtual models were obtained. Using two different post materials (glass fiber and PEEK post) and two different crown materials (metal supported ceramic and PEEK crown), the modeling of the maxillary central tooth was completed and a total of four groups were obtained. Finally, 135° and 100 N forces were applied from the midpoint of the palatal surface.
The FEA analysis showed the use of PEEK as post material decreased the stress values in the post, post cement and composite core models and did not have any significant change in the dentin and crown cement models. The use of composite veneer with PEEK substructure as crown material reduced stress values in dentin, the post and composite core and increased stress values in both the post cement and the crown cement.
Since the elastic modulus of the PEEK material is very close to dentin tissue, finite element stress analysis, less stress formation in the tooth and post core restoration compared to other post systems was observed. In this context, PEEK post may reduce irreversible complications.
采用有限元分析方法，比较使用低弹性模量聚醚醚酮（PEEK）作为牙桩和牙冠材料与玻璃纤维桩及金属烤瓷冠后所产生的应力。
首先，将通过微型计算机断层扫描（micro-CT）获取的上颌中切牙图像上传至计算机程序。在计算机环境中对所有材料进行建模，从而获得三维（3D）虚拟模型。使用两种不同的桩材料（玻璃纤维桩和PEEK桩）以及两种不同的冠材料（金属烤瓷冠和PEEK冠），完成上颌中切牙的建模，共得到四组模型。最后，从腭面中点施加135°、100 N的力。
有限元分析表明，使用PEEK作为桩材料可降低桩、桩核粘结剂和复合树脂核模型中的应力值，而在牙本质和冠核粘结剂模型中无显著变化。使用带有PEEK结构的复合树脂贴面作为冠材料可降低牙本质、桩和复合树脂核中的应力值，并增加桩核粘结剂和冠核粘结剂中的应力值。
由于PEEK材料的弹性模量与牙本质组织非常接近，通过有限元应力分析观察到，与其他桩系统相比，牙齿和桩核修复中形成的应力较小。在此背景下，PEEK桩可能会减少不可逆并发症的发生。
