Department of Oral and Maxillofacial Surgery, Pontificia Universidade Catolica do Rio Grande do Sul, Av. Ipiranga 6681, Prédio 6, Porto Alegre - RS, 90610-001, Brazil.
J Mech Behav Biomed Mater. 2010 Jul;3(5):382-91. doi: 10.1016/j.jmbbm.2010.02.002. Epub 2010 Feb 26.
This study characterized the interplay between topography/chemistry and early bone response of etched and no-etched resorbable blasted media (RBM) processed surfaces. Screw-root form Ti-6Al-4V implants treated with alumina blasting/acid-etching (AB/AE), RBM alone (RBM), and RBM + acid-etching (RBMa) were evaluated. The surface was characterized by scanning electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. Implants placed in the tibia of dogs remained 3 and 5 weeks in vivo. Following euthanasia, half of the specimens were torqued to interface failure and the remaining subjected to bone-to-implant contact (BIC) and bone area fraction occupied (BAFO) between threads evaluation. The AB/AE surface was rougher than the RBM and RBMa. Higher levels of calcium and phosphorous were observed for the RBM surface compared to the RBMa. No significant differences were observed in torque, BIC, and BAFO between surfaces. Woven bone formation at 3 weeks and its initial replacement by lamellar bone at 5 weeks were observed around all implants' surfaces.
本研究描述了经酸蚀处理和未酸蚀处理的可吸收喷砂介质（RBM）处理表面形貌/化学特性与早期骨反应之间的相互作用。对经过氧化铝喷砂/酸蚀（AB/AE）处理、单独使用 RBM（RBM）和 RBM+酸蚀（RBMa）处理的 Ti-6Al-4V 螺钉根form 型种植体进行了评估。通过扫描电子显微镜、原子力显微镜和 X 射线光电子能谱对表面进行了表征。将种植体植入犬的胫骨中，体内植入 3 周和 5 周。安乐死后，将一半标本进行扭矩至界面失效，其余标本进行螺纹间骨-种植体接触（BIC）和骨面积分数（BAFO）评估。AB/AE 表面比 RBM 和 RBMa 更粗糙。与 RBMa 相比，RBM 表面观察到更高水平的钙和磷。各表面之间的扭矩、BIC 和 BAFO 无显著差异。在所有种植体表面周围，均观察到 3 周时的编织骨形成，并在 5 周时由板层骨初始替代。
