Centro de Estudios Superiores de Ortodoncia, Mexico.
Implant Dent. 2011 Aug;20(4):273-9. doi: 10.1097/ID.0b013e3182167308.
The purpose of this study was to assess the stability of sandblasted and acid-etched miniscrew implants based on orthodontic mechanics for space closure after tooth extraction.
Twenty-four orthodontic mini-implants were placed in 13 patients, for a skeletal anchorage purpose, all prepared by the manufacturer (3M Unitek-IMTEC Ortho USA) with sandblasting and acid treatment. Anchorage measurements were made on occlusal radiographs, on a monthly basis in a 6-month period.
All the mini-implants were effective for the clinical trial; but 65% of the mini-implants, after been loaded, showed up to 1 degree, or less, of displacement, while 35% showed ≥2 degrees shift. The mandible mini-implants resulted in a smaller amount of displacement than the ones located in the maxilla. The ones located at the anterior maxilla displaced less than the posterior. The best results were obtained with the 8-mm mini-implants, followed by the 6-mm and 10-mm mini-implants.
Modifying the mini-implant surface with sandblasting and acid treatment offers good bone anchoring for orthodontic purposes.
本研究旨在评估喷砂酸蚀正畸微种植体支抗在拔牙后关闭间隙的稳定性。
24 颗正畸微种植体被放置在 13 名患者中，用于骨骼锚固，均由制造商（3M Unitek-IMTEC Ortho USA）制备，采用喷砂和酸蚀处理。在 6 个月的时间内，每月通过咬合片测量锚固测量值。
所有微种植体均适用于临床试验；但 65%的微种植体在加载后出现 1 度或以下的位移，而 35%的微种植体显示≥2 度的移位。下颌微种植体的位移量小于上颌微种植体。上颌前牙区的微种植体位移量小于上颌后牙区。8mm 微种植体的效果最好，其次是 6mm 和 10mm 微种植体。
用喷砂和酸蚀处理来修饰微种植体表面，可为正畸提供良好的骨锚固。
