Department of Prosthodontics, Faculty of Dentistry, University of Szeged, Tisza Lajos Krt. 64-64, 6720, Szeged, Hungary.
Department of Experimental Dentistry and Oral Biology, Faculty of Dentistry, University of Szeged, Szeged, Hungary.
BMC Oral Health. 2021 Feb 25;21(1):86. doi: 10.1186/s12903-021-01442-1.
In this research the biomechanical properties of a bone model was examined. Porcine ribs are used as experimental model. The objective of this research was to investigate and compare the biomechanical properties of the bone model before and after implant placement.
The bone samples were divided in three groups, Group 1 where ALL-ON-FOUR protocol was used during pre-drilling and placing the implants, Group 2 where ALL-ON-FOUR protocol was used during pre-drilling, and implants were not placed, and Group 3 consisting of intact bones served as a control group. Static and dynamic loading was applied for examining the model samples. Kruskal-Wallis statistical test and as a post-hoc test Mann-Whitney U test was performed to analyze experimental results.
According to the results of the static loading, there was no significant difference between the implanted and original ribs, however, the toughness values of the bones decreased largely on account of predrilling the bones. The analysis of dynamic fatigue measurements by Kruskal-Wallis test showed significant differences between the intact and predrilled bones.
The pre-drilled bone was much weaker in both static and dynamic tests than the natural or implanted specimens. According to the results of the dynamic tests and after a certain loading cycle the implanted samples behaved the same way as the control samples, which suggests that implantation have stabilized the skeletal bone structure.
本研究旨在检查骨模型的生物力学特性。采用猪肋骨作为实验模型。本研究的目的是研究和比较植入前和植入后骨模型的生物力学特性。
将骨样本分为三组，第 1 组在预钻孔和放置植入物时使用 ALL-ON-FOUR 方案，第 2 组在预钻孔时使用 ALL-ON-FOUR 方案，但未放置植入物，第 3 组由完整的骨骼作为对照组。对模型样本进行静态和动态加载。使用 Kruskal-Wallis 统计检验和事后检验 Mann-Whitney U 检验分析实验结果。
根据静态加载的结果，植入的肋骨与原始肋骨之间没有显著差异，但由于预钻孔，骨骼的韧性值大大降低。通过 Kruskal-Wallis 检验对动态疲劳测量的分析表明，完整骨与预钻孔骨之间存在显著差异。
预钻孔的骨在静态和动态测试中的强度均明显低于天然或植入的标本。根据动态测试的结果，在一定的加载循环后，植入的样本表现出与对照样本相同的方式，这表明植入物稳定了骨骼结构。
