Abstract:

Objective    To evaluate the effect of BaTiO3 piezoelectric ceramic coating on the stability of mini-implant anchorage. Methods    Each side of mandible of dogs were inserted into two anchorage mini-implants，the left side was control group（machined surface），and the right side was experimental group（BaTiO3 piezoelectric ceramic coating surface）. Two weeks after implantation，the mini-implants were given 1.96 N mutual extraction for one month. And then the animals were sacrificed for analyzing the distance between the implants，micro-CT scanning，histological observation and biomechanical test. Results    After giving the same orthodontic traction force，the displacement distance of experimental group was smaller than the control group. And the bone volume ratio（BV/TV），trabecular number（Tb.N）and trabecular thickness（Tb.Th）increased significantly in the experimental group compared to control group，and the trabecular space（Tb.Sp）of nanotube surface decreased significantly. The bone implant contact（BIC）and maximum pull-out force in the experimental group were significantly higher than control group. Conclusion    Mini-implant anchorage with piezoelectric ceramic coating can improve the stability and osseointegration in the process of orthodontic traction.

Key words: mini-implant anchorage, piezoelectric effect, stability, osseointegration

摘要：

目的    评价钛酸钡（BaTiO3）压电陶瓷涂层对种植支抗稳定性及其周围骨改建情况的影响。方法    本研究于2013年8月至2014年1月在兰州军区总医院进行。选择5只成年杂种犬，将机械处理表面支抗种植钉（对照组）植入犬左侧下颌骨，BaTiO3压电陶瓷涂层支抗种植钉（实验组）植入犬右侧下颌骨，每侧各2枚；术后2周，给予1.96 N交互牵引力持续1个月，测量2枚种植体位移并通过影像学检查、组织学染色分析、生物力学检测观察种植支抗稳定性及其与周围骨结合的效果。结果    与对照组相比，实验组BaTiO3压电陶瓷涂层种植支抗移动距离明显减小，骨形成活跃，骨结合率及最大拔出力显著升高，组间差异具有统计学意义（P < 0.05）。结论    在种植支抗表面制备BaTiO3压电陶瓷涂层可有效增加种植支抗的稳定性。

关键词: 种植支抗, 压电效应, 稳定性, 骨结合