Department of Orthodontics, Faculty of Dentistry, Başkent University, Ankara, Turkey.
Am J Orthod Dentofacial Orthop. 2012 Feb;141(2):187-95. doi: 10.1016/j.ajodo.2011.07.020.
The aim of this study was to evaluate the primary stability and the histomorphometric measurements of self-drilling and self-tapping orthodontic microimplants and the correlations between factors related to host, implant, and measuring technique.
Seventy-two self-drilling and self-tapping implants were placed into bovine iliac crest blocks after computed tomography assessments. Insertion torque values, subjective assessments of stability, and Periotest (Medizintecknik Gulden, Modautal, Germany) measurements were performed for each implant. Twelve specimens of each group were assigned to histologic and histomorphometric assessments.
The differences between insertion torque values, most Periotest values, and subjective assessments of stability scores were insignificant (P >0.05). The bone-implant contact percentage of the self-drilling group (87.60%) was higher than that of the self-tapping group (80.73%) (P <0.05). Positive correlations were found between insertion torque value, cortical bone thickness, and density in both groups (P <0.05). Negative correlations between insertion torque values and Periotest values were mostly observed in the self-drilling group (P <0.05). Positive correlations were found between bone-implant contact percentages, cortical bone densities, and insertion torque values in both groups (P <0.05). The differences between insertion torque values and corresponding subjective assessments of stability scores were different in both groups (P <0.05).
The differences in insertion torque values, Periotest values, and subjective assessments of stability scores of self-drilling and self-tapping implants were insignificant. Self-drilling implants had higher bone-implant contact percentages than did self-tapping implants. Significant correlations were found between parameters influencing the primary stability of the implants.
本研究旨在评估自攻自钻式正畸微种植体的初期稳定性和组织学测量值，并分析与宿主、种植体和测量技术相关的因素之间的相关性。
通过计算机断层扫描评估后，将 72 个自攻自钻式和自攻式种植体植入牛髂嵴块中。对每个种植体进行插入扭矩值、稳定性主观评估和 Periotest（德国 Medizintecknik Gulden，Modautal）测量。每组 12 个标本用于组织学和组织形态学评估。
插入扭矩值、大多数 Periotest 值和稳定性主观评估得分之间的差异无统计学意义（P>0.05）。自攻组的骨-种植体接触率（87.60%）高于自攻组（80.73%）（P<0.05）。两组中插入扭矩值与皮质骨厚度和密度均呈正相关（P<0.05）。自攻组中插入扭矩值与 Periotest 值之间主要呈负相关（P<0.05）。两组中骨-种植体接触率、皮质骨密度和插入扭矩值之间呈正相关（P<0.05）。两组中插入扭矩值与相应稳定性主观评估得分之间的差异有统计学意义（P<0.05）。
自攻自钻式和自攻式种植体的插入扭矩值、Periotest 值和稳定性主观评估得分差异无统计学意义。自攻式种植体的骨-种植体接触率高于自攻式种植体。影响种植体初期稳定性的参数之间存在显著相关性。
