Tecco Simona, Tetè Stefano, Perillo Letizia, Chimenti Claudio, Festa Felice
Department of Oral Science, University G. D’Annunzio, Chieti/Pescara, Italy.
World J Orthod. 2009 Winter;10(4):290-4.
To evaluate the transverse dimensions of the maxillary arch induced by fixed self-ligating and traditional straight-wire appliances during orthodontic therapy.
Forty consecutive patients (age range 14 to 30 years) with normal or low mandibular plane angle, normal overbite, and mild crowding were included. The traditional appliance was composed of Victory Series MBT brackets (3M Unitek), and the self-ligating appliance of Damon-3MX brackets (Ormco). The leveling and aligning phase with round archwires lasted 6 months and was followed by another 6 months of rectangular archwires. The archwire sequence with the MBT appliance was 0.016-inch and 0.019 3 0.025-inch Ni-Ti form II (3M Unitek), while in the Damon-3MX, it was 0.014-inch and 0.016-inch followed by 0.016 3 0.025-inch copper nickel-titanium (Ormco). Intercanine, first and second interpremolar, and intermolar widths in the maxilla were recorded before treatment (T0) and 12 months later (T1).
In both groups, a significant increase from T0 to T1 was recorded for all transverse measurements, but no significant difference was observed between groups.
Within 12 months of treatment, both appliances increased maxillary dentoalveolar widths.
评估正畸治疗期间固定自结扎矫治器和传统直丝弓矫治器对上颌牙弓横向尺寸的影响。
纳入40例连续患者（年龄范围14至30岁），下颌平面角正常或偏低，覆盖正常，有轻度牙列拥挤。传统矫治器由Victory系列MBT托槽（3M Unitek）组成，自结扎矫治器为Damon-3MX托槽（奥美科）。使用圆丝进行排齐整平阶段持续6个月，之后使用方丝再进行6个月。MBT矫治器的弓丝序列为0.016英寸和0.019×0.025英寸镍钛丝Form II（3M Unitek），而Damon-3MX矫治器的弓丝序列为0.014英寸和0.016英寸，随后是0.016×0.025英寸铜镍钛丝（奥美科）。记录治疗前（T0）和12个月后（T1）上颌的尖牙间、第一和第二前磨牙间以及磨牙间宽度。
两组中，所有横向测量值从T0到T1均有显著增加，但两组间未观察到显著差异。
在治疗的12个月内，两种矫治器均增加了上颌牙槽嵴宽度。
