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首页> 外文期刊>The International journal of oral & maxillofacial implants >Evaluation of New Bone Formation and Osseointegration Around Subperiosteal Titanium Implants with Histometry and Nanoindentation
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Evaluation of New Bone Formation and Osseointegration Around Subperiosteal Titanium Implants with Histometry and Nanoindentation

机译：直方图和纳米压痕技术评估骨膜下钛植入物周围新骨的形成和骨整合

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Purpose: To assess the quality and quantity of newly formed bone around rough-surfaced titanium subperiosteal implants stabilized with two different fixation techniques and to investigate nanoindentation as a method for measuring the elastic properties of the bone around these implants. Materials and Methods: Ten 6-month-old white rabbits were used in this study. One femur received a subperiosteal implant fixed to the bone with screws. The other femur received a subperiosteal implant stabilized with a trough (bed) in the bone area, plus fixation screws. After a 3-month healing period, the animals were sacrificed and each titanium plate was resected along with the surrounding bone. Histometric measurements of osseointegration were performed on 16 titanium plates, and 16 titanium plates were evaluated qualitatively (hardness and modulus of elasticity) with nanoindentation. A regression model was used to analyze the data. Results: Subperiosteal implants placed into a trough performed significantly better than those placed on top of the cortical bone in terms of percentage of bone in direct contact with the titanium plate, length of new bone, and percentage of area of new bone. The mechanical properties (modulus of elasticity, hardness) of the newly formed bone above the plate measured at the microstructural level were significantly inferior to those of the mature cortical bone below the plate. Conclusion: Subperiosteal implants placed into a trough performed better than those placed on top of the cortical bone, but it seems that 3 months of healing is not enough to achieve optimal integration and bone maturation around them. Nanoindentation can offer valuable insight into the elastic properties of the microstructural component of the bone.
机译：目的：评估用两种不同的固定技术稳定的粗糙表面钛骨膜下植入物周围新形成的骨的质量和数量，并研究纳米压痕作为测量这些植入物周围骨弹性的方法。材料和方法：十只6个月大的白兔用于这项研究。一条股骨接受了用螺钉固定在骨上的骨膜下植入物。另一个股骨接受了骨膜下植入物，并在骨区域用槽（床）稳定，外加固定螺钉。在3个月的愈合期后，处死动物，并将每个钛板与周围的骨头一起切除。在16块钛板上进行骨整合的直方图测量，并使用纳米压痕对16块钛板进行定性评估（硬度和弹性模量）。回归模型用于分析数据。结果：就直接与钛板接触的骨的百分比，新骨的长度和新骨的面积百分比而言，放入槽中的骨膜下植入物的性能明显好于放置在皮质骨顶部的植入物。在微观结构水平上测量的板上方新形成的骨的机械性能（弹性模量，硬度）显着低于板下方成熟皮质骨的机械性能（弹性模量，硬度）。结论：放入槽中的骨膜下植入物的效果要好于放置在皮质骨顶部的植入物，但似乎3个月的愈合不足以实现其周围的最佳整合和骨骼成熟。纳米压痕可以提供有关骨微结构组件的弹性特性的有价值的见解。

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