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目的:探讨双期矫正在治疗安氏Ⅱ类1分类错畸形中的临床效果。方法:对35例安氏Ⅱ类1分类错患者进行双期矫正(Twin-block功能性矫治器+固定矫正),应用SPSS11.0软件包对治疗前后的X线头影测量数据进行配对t检验。结果:双期治疗结束后,患者后牙咬合,前牙覆、覆盖及侧貌均有明显改善,下颌生长朝着有利的方向发生改变。∠ANB、U1/SN、OB、OJ、UL-E、ULP在治疗后减少,差异具有统计学意义(P<0.01)。∠SNB、Co-Go、Go-Gn、Co-Gn在治疗后增加,差异具有统计学意义(P<0.01),L1-MP、FH-MP均显著增加(P<0.05)。结论:Twin-block矫治器对于安氏Ⅱ类1分类错患者具有矫治作用,通过诱导下颌功能性前移,抑制上颌骨生长,促进下颌骨生长,协调上、下颌骨关系,改善面型。
Objective: To investigate the clinical effect of double-phase correction in the treatment of Class Ⅱ division 1 malocclusion. Methods: 35 patients with Class Ⅱ Division 1 malocclusion were treated with double-phase correction (Twin-block functional appliance + fixed correction). SPSS 11.0 software package was used to perform paired t-test on X-cephalometric data before and after treatment . Results: After the double-phase treatment, the posterior teeth occlusion, anterior lamina majus, coverage and lateral appearance were significantly improved, the growth of mandibular changes in the favorable direction. ∠ANB, U1 / SN, OB, OJ, UL-E, ULP decreased after treatment, the difference was statistically significant (P <0.01). The levels of S-N, Co-Go, Go-Gn and Co-Gn increased after treatment in both groups (P <0.01), while the levels of L1-MP and FH-MP increased significantly (P <0.05). CONCLUSION: The Twin-block appliance has an effect on the treatment of Class Ⅱ division 1 malocclusion patients. By inducing mandibular functional advancement, it inhibits the growth of the maxilla, promotes the growth of the mandible, coordinates the relationship between the upper and lower jaws, and improves the surface shape.