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目的应用PAR指数评价传动直丝弓矫治技术与MBT滑动直丝弓矫治技术在骨性Ⅱ类错拔牙患者的矫治效果。方法 30例安氏Ⅱ类Ⅰ分类错患者,分别使用传动直丝弓技术矫治15例(A组)、MBT滑动直丝弓矫治15例(B组),于治疗前、后对模型进行PAR指数测定,并进行统计分析。结果 A组治疗前、后加权PAR总分值减少率(92.26±3.15)%,B组为(93.78±2.58)%,2组间差异无统计学意义(P>0.05);A组矫治疗程为(20.6±2.8)个月,B组为(22.3±3.1)个月,差异有统计学意义(P<0.05)。结论应用传动直丝弓技术矫治或MBT滑动直丝弓矫治技术均可使安氏Ⅱ类Ⅰ分类错得到较大改善。
Objective To evaluate the effect of straightening wire straightening technique and MBT sliding straightening wire technique in the treatment of skeletal Class Ⅱ malocclusion patients by PAR index. Methods Thirty patients with Class Ⅱ division Ⅰ malocclusion were treated with straight wire arch wire technique in 15 cases (group A) and MBT with straight wire arch correction in 15 cases (group B). The models were treated with PAR Index determination, and statistical analysis. Results The reduction rate of weighted total score (PAR) in group A was (92.26 ± 3.15)% before and after treatment, and (93.78 ± 2.58)% in group B, there was no significant difference between the two groups (P> 0.05) (20.6 ± 2.8) months, and group B (22.3 ± 3.1) months, the difference was statistically significant (P <0.05). Conclusions The classification of Class Ⅱ division Ⅰ malocclusion can be greatly improved by using the techniques of transmission straight wire arch technique or MBT sliding straight wire arch correction.