Department of Prosthodontics, Faculty of Dentistry, Istanbul Yeni Yüzyıl University, Istanbul, Turkey.
Program of Dental Technicians, Istanbul University-Cerrahpasa, Istanbul, Turkey.
Microsc Res Tech. 2020 Jul;83(7):804-810. doi: 10.1002/jemt.23471. Epub 2020 Mar 13.
The present study evaluated the bond strengths of prefabricated PolyEtherKetoneKetone (PEKK) posts, PEKK posts custom-configured according to root-canal size, and conventional fiber posts. A total of 30 maxillary incisors were randomly divided into three groups, as follows: Group 1: fiber posts; Group 2: prefabricated PEKK posts; Group 3; custom-made PEKK posts. Following endodontic treatment, post spaces were prepared, and posts were cemented with resin cement. Push-out bond strength testing was performed using a universal testing machine, and fractures modes were examined under a scanning electron microscope. Data were analyzed using One-way ANOVA and Tukey's HSD tests, with the level of significance set at .05. The highest bond-strength values in the cervical section were observed with the custom-made PEKK post (17.3470 MPa), whereas the highest bond-strength values in the middle and apical sections were observed with the conventional fiber posts (11.5375 MPa and 6.8625 MPa, respectively). Bond-strength values for all posts systems decreased in a cervical to apical direction. PEKK posts are a suitable alternative to fiber posts. Although custom-made PEKK posts demonstrated better bond strength than prefabricated PEKK posts, further studies are needed to evaluate their clinical performance.
本研究评估了预制聚醚醚酮（PEKK）桩、根据根管大小定制的 PEKK 桩和常规纤维桩的粘结强度。将 30 颗上颌切牙随机分为三组：第 1 组：纤维桩；第 2 组：预制 PEKK 桩；第 3 组：定制 PEKK 桩。根管治疗后，预备桩道，并用树脂水门汀粘结桩。使用万能试验机进行推出粘结强度测试，并在扫描电子显微镜下观察断裂模式。使用单因素方差分析和 Tukey 的 HSD 检验对数据进行分析，显著性水平设置为.05。定制 PEKK 桩在颈部的粘结强度值最高（17.3470 MPa），而常规纤维桩在中部和根尖部的粘结强度值最高（分别为 11.5375 MPa 和 6.8625 MPa）。所有桩系统的粘结强度值均从颈部向根尖方向降低。PEKK 桩是纤维桩的一种合适替代品。虽然定制的 PEKK 桩的粘结强度优于预制的 PEKK 桩，但需要进一步的研究来评估它们的临床性能。
