Kitahara-Céia Flávia Mitiko Fernandes, Assad-Loss Tatiana Féres, Mucha José Nelson, Elias Carlos Nelson
UFF, Niterói, RJ, Brazil.
Dental Press J Orthod. 2013 Mar-Apr;18(2):36-41. doi: 10.1590/s2176-94512013000200012.
To morphologically evaluate the active tip of six different types of self-drilling mini-implants for orthodontic anchorage.
Images of the active tips of the mini-implants were obtained with a Zeiss optical microscope Stemi 200-C, with magnification of 1.6X. The images of the surface were viewed with the Axio Vision program (Zeiss, Jena, Germany) to calculate linear and angular measures. Mini-implant morphology and the details of tips and threads were also evaluated through Scanning Electronic Microscopy (SEM) (JEOL, model JSM5800 LV - JEOL, Tokyo, Japan) with magnifications of 90X and 70X, respectively. The evaluation of the mini-implant taper shape was assessed using the formula: (b - a) / (2 x D).
The following variables were measured: (1) active tip width, (2) major diameter of external thread, (3) minor diameter of internal thread and taper of the mini-implant, (4) number of threads and lead of the screw, (5) angle of thread, (6) flank width and (7) pitch width.
Mini-implants from different manufacturers presented active tips with different characteristics. Mechanical testing is necessary to correlate the analyzed characteristics aiming to determine the best performance.
对六种不同类型的用于正畸支抗的自攻型微型种植体的活性尖端进行形态学评估。
使用蔡司Stemi 200-C光学显微镜获取微型种植体活性尖端的图像，放大倍数为1.6倍。通过Axio Vision程序（德国耶拿蔡司公司）观察表面图像以计算线性和角度测量值。还通过扫描电子显微镜（SEM）（日本东京JEOL公司，型号JSM5800 LV）分别以90倍和70倍的放大倍数评估微型种植体的形态以及尖端和螺纹的细节。使用公式：(b - a) / (2 x D)评估微型种植体的锥度形状。
测量了以下变量：（1）活性尖端宽度，（2）外螺纹大径，（3）内螺纹小径和微型种植体锥度，（4）螺纹数量和螺距，（5）螺纹角度，（6）牙侧宽度和（7）螺距宽度。
不同制造商的微型种植体活性尖端具有不同特征。为确定最佳性能，需要进行力学测试以关联所分析的特征。
