Faculty of Dentistry, College of Dental Medicine, Kaohsiung Medical University, University Hospital, No. 100 Shih-chuan 1st Road, Kaohsiung, Taiwan.
Implant Dent. 2011 Apr;20(2):139-45. doi: 10.1097/ID.0b013e31820fb7d4.
New modified mini-implants have recently come into use for reinforcing skeletal anchorage in orthodontic application. The aim of this study was to investigate the influence of the design of a mini-implant on its mechanical strength.
We measured the insertion torques and horizontal pull-out strengths of 3 brands of infrazygomatic mini-implants (AbsoAnchor, Bioray, and Lomas; 2 mm for all). Five implants of each brand were manually driven 6 mm into the artificial bone. Significant differences in various parameters among the brands were investigated with the Kruskal-Wallis test.
There was no significant relationship between insertion torque and horizontal pull-out strength. The Bioray mini-implants had significantly greater horizontal pull-out strength than the AbsoAnchor mini-implants.
The design of the mini-implant can influence its insertion torque and horizontal pull-out strength. In our findings, the horizontal pull-out strength of all mini-implants placed in the infrazygomatic crest was significantly greater than the orthodontic force applied.
新型改良微型种植体最近已用于正畸应用中增强骨骼锚固。本研究旨在探讨微型种植体设计对其机械强度的影响。
我们测量了 3 种品牌（AbsoAnchor、Bioray 和 Lomas；所有品牌均为 2mm）的颧下微型种植体的插入扭矩和水平拔出强度。每个品牌的 5 个种植体均手动驱动 6mm 进入人造骨。使用 Kruskal-Wallis 检验研究品牌之间各种参数的显著差异。
插入扭矩与水平拔出强度之间无显著关系。Bioray 微型种植体的水平拔出强度显著大于 AbsoAnchor 微型种植体。
微型种植体的设计会影响其插入扭矩和水平拔出强度。在我们的研究结果中，所有放置在颧下嵴的微型种植体的水平拔出强度均明显大于正畸力的应用。
