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目的:研究双颌垫功能矫治器矫治安氏Ⅱ类错畸形患者上下颌牙的变化。方法:选择11例安氏Ⅱ类错患者,双颌垫矫治器治疗平均约10个月,治疗结束后测量治疗前后头颅侧位片并对测量结果进行统计学分析。结果:所有病例经过平均10个月的功能矫治器治疗后,磨牙达到中性关系,前牙明显内收,上颌磨牙平均远中移动(U6-PTV)0.76mm,伸长(U6-PP)0.62mm;下磨牙平均近中移动(L6-PTV)0.90mm,伸长(L6-MP)0.61mm,差异都有统计学意义(P<0.05);上中切牙平均远中移动(U1-PTV)1.18mm,伸长(UI-PP)0.66 mm,下切牙平均近中移动(LI-PTV)1.06mm,差异有统计学意义(P<0.05),下切牙伸长(LI-MP)0.58mm,但差异无统计学意义(P>0.05)。结论:双颌垫功能矫治器对替牙或恒牙初期安氏Ⅱ类错患者有明显的治疗效果,它可以减少切牙的突度,减少覆盖,较好地改善Ⅱ类磨牙关系,提高安氏Ⅱ类错患者的治疗效果。
Objective: To study the changes of maxillary and mandibular teeth in patients with Class Ⅱ malocclusion treated with bipolar pad appliance. Methods: Eleven patients with Class Ⅱ malocclusion were selected. Patients treated with bipolar pad appliance had an average of about 10 months. After the treatment, the lateral cephalograms were measured before and after treatment and the results were statistically analyzed. Results: After all the cases were treated with functional appliance for an average of 10 months, the molars reached a neutral relationship, the anterior teeth were obviously adducted, the mean maxillary molars moved 0.76mm (U6-PTV) and 0.62mm (U6-PP) (L6-PT) 0.90mm, L6-MP 0.61mm, the differences were statistically significant (P <0.05); the average distance of the upper and lower distal molars (U1-PTV) was 1.18mm (UI-PP) 0.66 mm, LI-PTV 1.06 mm, the difference was statistically significant (P <0.05), the lower incisor extension (LI-MP) Statistical significance (P> 0.05). CONCLUSION: The bimaxillary pad appliance has obvious curative effect on the patients with Class Ⅱ malocclusion in the initial stage of molar replacement or permanent dentition. It can reduce the incisors’ incision, reduce the coverage, improve the relationship between type Ⅱ molars and improve Class Ⅱ malocclusion patients with the treatment effect.