Department of Orthodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey.
Implant Dent. 2013 Apr;22(2):133-7. doi: 10.1097/ID.0b013e31827b96c2.
To measure strains around orthodontic implants upon torque tightening and loading and to assess correlations between factors influencing primary stability.
Self-drilling implants were placed into bovine iliac crest blocks after CT assessments. Upon bonding of strain gauges on bone adjacent to the implants, strain measurements were performed using a data acquisition system during torque tightening and 250 g orthodontic force application by elastic chains.
The torque required to place straight implants (12.16 N.cm) was higher than 30- to 40-degree angulated implants (9.31 N.cm) (P < 0.05). Cortical bone strain amplitudes of both implant placements were comparable (P > 0.05). Strains during torque tightening of straight (196 με) and tilted (114 με) implants were higher than those obtained during orthodontic loading (20-30 με). Despite the positive and direct relationship found between torque and torque strain output, strong correlations between other parameters could not be detected.
Vertically aligned and 30- to 40-degree angulated immediate orthodontic microimplants are associated with low amplitude strains upon torque tightening and orthodontic loading.
测量正畸种植体在转矩紧固和加载时周围的应变，并评估影响初始稳定性的因素之间的相关性。
在 CT 评估后，将自攻种植体放置在牛髂嵴块中。在将应变计粘合到种植体附近的骨上之后，使用数据采集系统在转矩紧固和通过弹性链施加 250 g 正畸力期间进行应变测量。
放置直形种植体（12.16 N.cm）所需的扭矩高于 30-40 度倾斜种植体（9.31 N.cm）（P <0.05）。两种种植体位置的皮质骨应变幅度相当（P >0.05）。直形（196 με）和倾斜（114 με）种植体在转矩紧固期间的应变高于在正畸加载期间获得的应变（20-30 με）。尽管发现扭矩与扭矩应变输出之间存在正相关和直接关系，但无法检测到其他参数之间的强相关性。
垂直对齐和 30-40 度倾斜的即刻正畸微种植体在转矩紧固和正畸加载时与低幅度应变相关。
