In vitro fracture resistance of implant-supported terminal zirconia cantilevered frameworks.

IF 0.9 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

European Oral Research Pub Date : 2025-01-05 DOI:10.26650/eor.20241338647

Tabark Shihab Al Bayati, Saja Ali Muhsin

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Abstract

Purpose: This study aims to investigate the in vitro fracture loads of three different terminal cantilever forms of implant-supported zirconia frameworks.

Materials and methods: 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.

Results: 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).

Conclusion: 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.

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种植端氧化锆悬臂框架的体外抗断裂性能。

目的：研究三种不同端部悬臂式氧化锆支架的体外断裂载荷。材料与方法：采用CAD/ cam制作30个种植体支撑氧化锆框架（Aconia, China），并将其分为3组，每组远端基台悬臂形式设计5mm: A组为方形悬臂，B组为椭圆形悬臂，C组为椭圆形-方形悬臂。采用万能试验机对试样施加垂直载荷，记录试样的断裂载荷。采用方差分析和Tukey事后检验进行统计评价。结果：B组平均骨折负荷（587.8±112.2 N）与C组平均骨折负荷（591.3±81.3 N）无显著差异，但均明显低于A组（893.8±145 N, p）。在本实验研究的范围内，可以得出结论，种植体支持的终端方形悬臂氧化锆框架，每个距离远端基台5mm，与椭圆和椭圆方形相比，更有可能表现出更大的垂直载荷阻力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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