Associate Professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Beni-Suef University, Beni-Suef, Egypt.
Professor, Department of Fixed Prosthodontics, Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt.
J Prosthet Dent. 2022 Jun;127(6):866-874. doi: 10.1016/j.prosdent.2020.08.033. Epub 2021 Jan 22.
Polyetheretherketone (PEEK) can be used as a framework material for removable and fixed dental prostheses. However, information about the use of PEEK as a post-and-core restoration is scarce.
The purpose of this in vitro study was to evaluate the effect of different surface treatments on the push-out bond strength of milled polyetheretherketone posts to resin cement.
Sixty intact human maxillary central incisors were selected and endodontically treated, and standardized post spaces were prepared. Sixty PEEK posts were milled from a prefabricated PEEK blank by using a computer-aided design and computer-aided manufacturing (CAD-CAM) system and divided into 3 groups (n=15) according to the surface treatment: acid etching by using 98% sulfuric acid (AE); airborne-particle abrasion by using 50-μm AlO (AA); nonthermal plasma treatment (NTP); in addition, PEEK posts (n=15) received no treatment (NT) and served as a control. All posts were bonded by using a self-adhesive resin cement. Three sections (coronal, middle, and apical) were obtained for each specimen. Push-out bond strength measurements (MPa) for each section were recorded by using a universal testing machine at a crosshead speed of 0.5 mm/min until failure occurred. The post-cement interfaces and failure modes were evaluated by using scanning electron microscopy. The data obtained were statistically analyzed by using 1-way ANOVA and the pair-wise Tukey (HSD) test to study the difference between group mean values (α=.05).
The overall mean ±standard deviation of the push-out bond strength was 11 ±2 MPa for AE group, 6 ±1 MPa for AA group, 5 ±1 MPa for NTP group, and 3 ±1 MPa for NT group. A statistically significant difference was found among all groups subjected to different surface treatments as indicated by the ANOVA test (P<.001). The pair-wise Tukey honestly significant difference (HSD) test showed a significant difference among the AE group and all groups (P<.001); however, no significant difference was observed between the AA and NTP groups (P>.05). Moreover, a significant difference was observed among all root sections (P<.001).
Surface treatment of PEEK posts with 98% sulfuric acid for 60 seconds showed significantly higher bond strength values than those in other groups. The bond strength of PEEK posts to resin cement was significantly higher in the coronal section than that in other sections.
聚醚醚酮（PEEK）可用作可摘和固定义齿的基托材料。然而，关于 PEEK 用作桩核修复的信息很少。
本体外研究的目的是评估不同表面处理方法对铣削聚醚醚酮桩核与树脂水门汀之间的推出粘结强度的影响。
选择 60 颗完整的上颌中切牙进行根管治疗，并预备标准化的桩腔。通过计算机辅助设计和计算机辅助制造（CAD-CAM）系统从预制 PEEK 坯料中铣削 60 个 PEEK 桩，并根据表面处理方法将其分为 3 组（n=15）：98%硫酸酸蚀（AE）；50-μm AlO 气固喷砂（AA）；非热等离子体处理（NTP）；此外，15 个 PEEK 桩未进行处理（NT）作为对照。所有桩核均使用自粘接树脂水门汀粘结。从每个样本中获得 3 个部分（冠部、中部和根尖部）。使用万能试验机以 0.5mm/min 的十字头速度记录每个部分的推出粘结强度（MPa），直至发生破坏。通过扫描电子显微镜评估桩-水门汀界面和失效模式。使用单因素方差分析和两两 Tukey（HSD）检验对数据进行统计学分析，以研究组平均值之间的差异（α=.05）。
AE 组、AA 组、NTP 组和 NT 组的总体平均推拉力值分别为 11±2MPa、6±1MPa、5±1MPa 和 3±1MPa。方差分析（ANOVA）显示，不同表面处理组之间的总体平均推拉力值存在统计学差异（P<.001）。两两 Tukey Honestly Significant Difference（HSD）检验显示，AE 组与其他组之间存在显著差异（P<.001）；然而，AA 组和 NTP 组之间没有显著差异（P>.05）。此外，各根部分段之间存在显著差异（P<.001）。
硫酸酸蚀 60 秒处理 PEEK 桩核表面可获得显著高于其他组的粘结强度值。PEEK 桩核与树脂水门汀的粘结强度在冠部明显高于其他部位。
