Maki Koutaro, Futaki Katsuyoshi, Tanabe Satoru, Takahashi Mariko, Ichikawa Yuta, Yamaguchi Tetsutaro
Department of Orthodontics, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-Ku, Tokyo 145-8515, Japan.
Int J Dent. 2016;2016:4348325. doi: 10.1155/2016/4348325. Epub 2016 Apr 24.
We have developed a new orthodontic bracket with three slots with lubricative properties on the working surfaces and proposed a new orthodontic treatment system employing 0.012-0.014-inch Ni-Ti arch wires. We recruited 54 patients, of which 27 received treatment with the new zirconia bracket with multiple slots system (M group), and the others received treatment with standard edge-wise appliances (control group [C group]). We compared the (1) tooth movement rate at the early stage of leveling; (2) changes in the dental arch morphology before and after leveling; and (3) pain caused by orthodontic treatment. Student's t-test was used in all assessments. The tooth movement rate in the maxillomandibular dentition was higher in the M group. The basal arch width, anterior length, and the intercanine width in the maxillary dentition were not significantly different in the two groups; however, the intercanine width in the mandibular dentition was higher in the C group. In assessments of treatment-related pain, the visual analogue pain score was 56.0 mm and 22.6 mm in the C and M groups, respectively. A new zirconia bracket with multiple slots system provided better outcomes with respect to tooth movement rate, treatment period, and postoperative pain, thus indicating its effectiveness over conventional orthodontic systems.
我们研发了一种新型正畸托槽，其工作表面有三个具有润滑特性的槽沟，并提出了一种采用0.012 - 0.014英寸镍钛弓丝的新型正畸治疗系统。我们招募了54名患者，其中27名接受新型多槽沟氧化锆托槽系统治疗（M组），其余患者接受标准方丝弓矫治器治疗（对照组[C组]）。我们比较了：(1)排齐初期的牙齿移动速率；(2)排齐前后牙弓形态的变化；以及(3)正畸治疗引起的疼痛。所有评估均采用学生t检验。M组上下颌牙列的牙齿移动速率更高。两组上颌牙列的基骨弓宽度、前牙长度和尖牙间宽度无显著差异；然而，C组下颌牙列的尖牙间宽度更高。在治疗相关疼痛评估中，C组和M组的视觉模拟疼痛评分分别为56.0 mm和22.6 mm。新型多槽沟氧化锆托槽系统在牙齿移动速率、治疗周期和术后疼痛方面提供了更好的效果，从而表明其优于传统正畸系统。
