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目的:观察在恒牙期前牙反矫治初期运用Ⅲ类颌间牵引纠正前牙反的临床效果。方法:选择我院口腔科2008年1月~2011年5月就诊的恒牙期安氏Ⅲ类前牙反的青少年患者18例,在矫治初期运用Ⅲ类颌间牵引纠正前牙反,比较治疗前后头影测量结果。结果:所有患者矫治早期前牙反就得到纠正,治疗结束后凹面型侧貌得到明显改善,磨牙为中性、完全近中关系,前牙覆盖、覆颌关系正常,尖牙呈中性关系,牙齿尖窝关系良好,矫治时间15~26个月,平均19.06个月。X线头影测量治疗后SNA、ANB、U1–NA及SN–MP增大,SNB、L1–NB及U1~L1减小,与治疗前比较,差异有统计学意义(P<0.05)。结论:Ⅲ类颌间牵引在恒牙期前牙反矫治初期的临床运用,可在治疗早期就有效地纠正前牙反,值得临床进一步推广。
OBJECTIVE: To observe the clinical effect of using Class Ⅲ intermaxillary traction to correct anterior crossbite during the initial stage of anterior crossbite in permanent dentition. Methods: 18 cases of adolescent patients with permanent dentition type Ⅲ anterior anterior crossbite who were treated in Department of Stomatology, our hospital from January 2008 to May 2011 were retrospectively analyzed. Ⅲ type intermaxillary traction was used to correct the anterior crossbite, Cephalometric measurements were compared before and after treatment. Results: All the patients were corrected for anteversion of anterior teeth in the early stage of orthodontics. After treatment, the concave facial appearance was significantly improved. The molars were neutral and completely close to each other. The anterior teeth were covered, the maxilla and mandible were normal, and the canines showed a neutral relationship , A good relationship between the teeth spire, correction of time 15 to 26 months, an average of 19.06 months. X-cephalometry measurement of SNA, ANB, U1-NA and SN-MP increased, SNB, L1-NB and U1 ~ L1 decreased, compared with before treatment, the difference was statistically significant (P <0.05). Conclusion: The clinical application of type Ⅲ intermaxillary traction in the early stage of anterior teeth correction of permanent teeth can effectively correct the anterior crossbite in the early stage of treatment, which is worth further promotion in clinic.