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首页> 外文期刊>Journal of Periodontology >Removal torque and histomorphometric evaluation of bioceramic grit-blasted/acid-etched and dual acid-etched implant surfaces: an experimental study in dogs.
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Removal torque and histomorphometric evaluation of bioceramic grit-blasted/acid-etched and dual acid-etched implant surfaces: an experimental study in dogs.

机译：生物陶瓷喷砂/酸蚀和双酸蚀植入物表面的去除扭矩和组织形态学评估：在狗中进行的实验研究。

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BACKGROUND: Surface modifications to dental implants have been used in an attempt to accelerate the osseointegration process. The objective of this study was to biomechanically/histomorphometrically evaluate a bioceramic grit-blasted and acid-etched surface (BGB/AA; test) versus a dual acid-etched implant surface (control) in a beagle dog model. METHODS: Control and BGB/AA implants were subjected to a series of physicochemical characterization tools, including scanning electron microscopy (SEM), atomic force microscopy (AFM), and auger photoelectron spectroscopy (APS). The animal model included the placement of 72 implants along the proximal tibiae of six beagle dogs, which remained in place for 2 or 4 weeks. After euthanization, half of the specimens were biomechanically tested (removal torque), and the other half was non-decalcified processed to slides of approximately 30 microm thickness for histomorphologic and histomorphometric (percentage of bone-to-implant contact [%BIC]) evaluation. Analysis ofvariance at the 95% confidence level and the Tukey post hoc test were used for multiple comparisons. RESULTS: SEM and AFM showed that surface microtextures were qualitatively and quantitatively different and that the BGB/AA surface presented higher submicrometer average roughness values (R(a)) and root mean square (RMS) values compared to control surfaces. Ca and P were detected at the BGB/AA surface by APS. Higher degrees of bone organization were observed along the perimeter of the BGB/AA surface compared to control, despite the non-significant differences in %BIC between the surfaces (P >0.25). Significantly higher removal torque was observed for the BGB/AA implants at both time periods (P <0.0001). CONCLUSION: According to the biomechanical and histomorphologic results, early biomechanical fixation was positively affected by the BGB/AA surface compared to the dual-acid etched surface.
机译：背景：已经对牙科植入物进行了表面改性，以试图加快骨整合过程。这项研究的目的是通过生物力学/组织形态学方法评估比格犬模型中生物陶瓷喷砂和酸蚀表面（BGB / AA;测试）与双酸蚀植入物表面（对照）的对比。方法：对对照和BGB / AA植入物进行一系列物理化学表征工具，包括扫描电子显微镜（SEM），原子力显微镜（AFM）和俄歇光电子能谱（APS）。动物模型包括沿六只比格犬的胫骨近端放置72个植入物，这些植入物保持原位2或4周。安乐死后，对一半标本进行生物力学测试（去除扭矩），另一半未经脱钙处理，制成约30微米厚的载玻片，用于组织形态学和组织形态学（骨与植入物接触的百分比[％BIC]）评估。 95％置信水平的方差分析和Tukey post hoc检验用于多重比较。结果：SEM和AFM显示表面微观结构在质量和数量上均不同，与对照表面相比，BGB / AA表面呈现出更高的亚微米平均粗糙度值（R（a））和均方根（RMS）值。通过APS在BGB / AA表面检测到Ca和P。尽管对照之间的％BIC没有显着差异（P> 0.25），但与对照相比，沿BGB / AA表面的周边观察到更高程度的骨骼组织。在两个时间段，BGB / AA植入物均观察到较高的去除扭矩（P <0.0001）。结论：根据生物力学和组织形态学结果，与双酸刻蚀表面相比，BGB / AA表面对早期生物力学固定有积极影响。

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