Abstract

This study evaluated the tensile strength of three aesthetic abutment materials at two different angulations (0 and 15°) to Ti-base and monolithic zirconia crowns. Prefabricated polyvinylidene difluoride (Medentika Implant) abutments were obtained and zirconia (Kingch) and polyetheretherketone (Ceramill) copings were manufactured using a computer-aided design/computer-aided manufacturing system (n = 12). Bonding surfaces of the copings and Ti-bases were air-abraded with alumina and then metal primer was applied. Self-adhesive resin cement (Multilink Hybrid Abutment) was used for cementation of copings to Ti-base. The bonding surfaces of the monolithic zirconia crowns (Upcera ST ML) were air-abraded and crowns were cemented using self-adhesive cement (seT PP). Data were analyzed using Kruskal–Wallis and Mann–Whitney U tests. No significant difference was found in the tensile strength of abutment to the crown interface for 0° tapered abutments (p > 0.05). Regarding 15° tapered abutments, the highest tensile strength values were obtained with zirconia abutments (p < 0.05). The tensile strength of monolithic zirconia crowns was lower than the restorations used in routine clinical practice.

摘要

本研究评估了三种美学基台材料在两种不同角度（0 和 15°）对钛基和整体氧化锆冠的拉伸强度。使用计算机辅助设计/计算机辅助制造系统（n = 12)。用氧化铝对顶盖和钛基体的粘合表面进行空气打磨，然后涂上金属底漆。自粘树脂粘固剂（Multilink Hybrid Abutment）用于将顶盖粘固到钛基体上。整体式氧化锆牙冠 (Upcera ST ML) 的粘合表面经过空气打磨，并使用自粘水泥 (setT PP) 粘合牙冠。使用 Kruskal-Wallis 和 Mann-Whitney U检验分析数据。对于 0° 锥形基台，基台与冠界面的抗拉强度没有显着差异（p  > 0.05）。关于 15° 锥形基台，使用氧化锆基台（p < 0.05)。整体式氧化锆冠的抗拉强度低于常规临床实践中使用的修复体。