Al Bayati Tabark Shihab, Muhsin Saja Ali
Department of Dental Techniques, College of Health and Medical Techniques, Middle Technical University, Ministry of Higher Education and Scientific Research, Baghdad, Iraq.
Department of Dental Techniques, College of Health and Medical Techniques, Middle Technical University, Ministry of Higher Education and Scientific Research, Baghdad Iraq.
Eur Oral Res. 2025 Jan 5;59(1):27-32. doi: 10.26650/eor.20241338647.
This study aims to investigate the in vitro fracture loads of three different terminal cantilever forms of implant-supported zirconia frameworks.
A total of 30 implant-supported zirconia frameworks (Aconia, China) were CAD/CAM-fabricated and divided into three groups, each with a distal abutment cantilever form design of 5mm: Group A had square cantilevers, Group B had oval cantilevers, and Group C had oval-square cantilevers. Universal testing machine was used to apply vertical loads to the samples, and the fracture loads were recorded. Variance analysis and Tukey's post-hoc tests were applied for statistical evaluation.
There was no significant difference between the mean fracture loads of Group B (587.8±112.2 N) and Group C (591.3 ±81.3 N), but both of these groups exhibited significantly lower fracture loads compared to Group A (893.8±145 N, p<0.001 for each).
Within the scope of this experimental study, it can be concluded that implant-supported terminal square shaped cantilever zirconia frameworks, each measuring 5 mm from the distal abutment, are more likely to exhibit greater resistance to vertical loads compared to their oval and oval-square counterparts.
本研究旨在调查三种不同末端悬臂形式的种植体支持氧化锆框架的体外断裂载荷。
共制作30个种植体支持的氧化锆框架（中国奥齿泰），采用计算机辅助设计与制造（CAD/CAM）技术，分为三组，每组的远中基牙悬臂形式设计为5mm：A组为方形悬臂，B组为椭圆形悬臂，C组为椭圆 - 方形悬臂。使用万能试验机对样本施加垂直载荷，并记录断裂载荷。采用方差分析和Tukey事后检验进行统计学评估。
B组（587.8±112.2 N）和C组（591.3±81.3 N）的平均断裂载荷之间无显著差异，但这两组的断裂载荷均显著低于A组（893.8±145 N，每组p<0.001）。
在本实验研究范围内，可以得出结论，与椭圆形和椭圆 - 方形的种植体支持末端方形悬臂氧化锆框架相比，从远中基牙起长度均为5mm的框架更有可能表现出对垂直载荷的更大抵抗力。
