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目的研究分析骨性3类错牙合采用减数下颌第二恒磨牙的治疗方式取得的临床疗效。方法选取该院2012年8月—2013年8月期间收治的10例骨性3类错牙合患者作为研究对象,这些患者的ANB角平均值为-2.63°,对所有患者进行拔除下颌第二恒磨牙,再运用钛螺旋推簧+3类进行牵引远中位置并移动下牙弓,同时让患者拍摄X线头影测量片进行观察,采用统计学分析的方式来统计处理治疗前和治疗后患者牙齿发生的变化。结果通过观察分析发现,10例骨性3类错牙合患者的SNA数值平均提高(2.37±2.37)°,ANB数值提高(1.46±0.89)°,L1-MP平均降低(4.37±2.57)°,L1-NB角降低(5.3±3.68)°,L1-NB距降低(2.18±1.26)mm,这些项目的数据证明,治疗前与治疗后差异明显,差异有统计学意义(P<0.05)。结论采用减数下颌第二恒磨牙的治疗方式有够有效治疗骨性3类错牙合患者,值得在临床医学上推广使用。
Objective To study the clinical efficacy of the treatment of skeletal Class 3 malocclusion by using the second mandibular molar molars. Methods Ten patients with orthodontic bone type 3 malocclusion in our hospital from August 2012 to August 2013 were selected as the study subjects. The average ANB angle of these patients was -2.63 °. All patients underwent mandibular second Permanent molars, and then use the titanium spiral spring +3 to pull the midline position and move the lower arch, while allowing patients to take X-ray cephalometric measurements were observed using statistical methods to statistical treatment of patients before and after treatment Changes in the teeth. Results Through the observation and analysis, the SNA values of 10 patients with type 3 malocclusion were significantly higher (2.37 ± 2.37) °, ANB (1.46 ± 0.89) ° and L1-MP (4.37 ± 2.57) The L1-NB angle decreased (5.3 ± 3.68) ° and the L1-NB distance decreased (2.18 ± 1.26) mm. The data of these items showed that there was significant difference between pre-treatment and post-treatment, the difference was statistically significant (P <0.05). Conclusion The treatment of the second mandibular second molars is effective in the treatment of patients with type 3 malocclusion. It is worth to be popularized in clinical medicine.