Objective： To investigate the curative effect of mini implant implants and oral arch on the treatment of superior dental arch protrusion. Methods： From January 2015 to February 2016, 80 patients with upper arch protrusion were selected. In the control group, the maxillary protraction was performed on the arch of the mouth outside the arch, and the mini-implant was used to treat the maxillary protraction. The effect of correction of maxillary arch protrusion was compared between the two groups. After the correction, the length of incisors was reduced and the width of incision was closed. The UI-SN angle and LI-MP angle of patients before and after intervention were compared. Results： The curative effect of maxillary protraction in mini group was higher than that in control group（P〈0.05）. In the observation group, 33 patients were markedly effective, 6 were effective, 1 was ineffective, 39 were effective, and the total effective rate was 97.50%. In the control group, 21 were markedly effective, 9 effective, 10 ineffective and 30 effective. Efficiency 75.00%. The UI-SN angle and LI-MP angle of the two groups before intervention were 81.31±3.15° and 98.13±7.11° in the mini-group and 81.32±3.16° and98.13± 7.16° in the control group, respectively the angle of LI-MP was superior to the control group,mini-group 78.13±2.51°, 105.24±8.26°, control group 80.78±2.46°, 99.24±7.12° P〈0.05. After the mini group orthodontic treatment, the length of the incisors was 2.65±1.41 mm, 6.87±1.83 mm larger than that of the control group（2.12±1.01 mm, 5.12±1.23 mm, P〈0.05）. Conclusion： Compared with the treatment of superior arch protrusion by mini-implant support, the effect of mini-implant support is better and the reduction of incisors length, incisors width and head shadow measurement results, correction effect is good, it is worth promoting.
Chinese Journal of Oral Implantology
micro implant implants
upper arch protrusion