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目的观察Empower双核自锁托槽矫治器在错畸形拔牙矫治中的应用效果,并与传统结扎式MBT直丝弓矫治器进行比较。方法双牙弓前突错畸形患者40例,随机分为观察组与对照组各20例。观察组采用Empower双核自锁托槽矫治器矫治,不采用支抗增强措施;对照组用MBT矫治器矫治,采取口外弓支抗增强措施。治疗前后拍摄X线头颅定位侧位片,定点、测量口腔颌面部牙性指标∠UI-SN、∠UI-PP、∠L1-MP、∠U1-L1、UIA-PTV、UIE-PTV、LIE-PTV、LIA-PTV、UM-PTV、LM-PTV,骨性指标∠SNA、∠SNB、∠ANB、∠MP-FH及软组织指标UL-EP、LL-EP、Z角。结果治疗结束后两组患者上下牙列排列整齐,覆覆盖正常,磨牙、尖牙关系中性,后牙尖窝咬关系良好,软组织侧貌改善显著。观察组平均疗程23个月,对照组平均疗程26个月。两组治疗前后骨性指标∠SNA、∠SNB、∠ANB、∠MP-FH差异无统计学意义;牙性指标∠UI-SN、∠UI-PP、∠L1-MP、∠U1-L1、UIA-PTV、UIE-PTV、LIE-PTV、LIA-PTV、UM-PTV、LM-PTV及软组织指标UL-EP、LL-EP、Z角治疗后得到改善,与治疗前相比,P均<0.05。两组治疗后各项指标差异无统计学意义。结论采用Empower双核自锁托槽矫治器对双牙弓前突错畸形进行矫正,可获得较好的支抗控制及前牙转矩控制,上下前牙内收明显,软组织侧貌改善明显。
Objective To observe the effect of Empower dual-core self-ligating brackets appliance in the treatment of malocclusion and to compare with traditional ligation MBT straightener appliance. Methods Forty patients with bilateral odontoid process malformations were randomly divided into observation group and control group with 20 cases each. The observation group was treated with Empower dual-core self-ligating brackets appliance without reinforcement. The control group was treated with MBT appliance and the external arch support was used. Before and after treatment of X-ray skull positioning lateral radiographs, fixed point, oral and maxillofacial dental parameters ∠UI-SN, ∠UI-PP, ∠L1-MP, ∠U1-L1, UIA- PTV, UIE-PTV, LIE PTV, LIA-PTV, UM-PTV, LM-PTV, skeletal index ∠SNA, ∠SNB, ∠ANB, ∠MP-FH and soft tissue index UL-EP, LL-EP, Z angle. Results After treatment, the upper and lower dentition of patients in both groups were arranged neatly, the coverage was normal, the molars and canines were neutral, the posterior teeth spine bite was good, and the soft tissue appearance was improved significantly. The observation group average course of 23 months, the control group, the average course of 26 months. There was no significant difference in the skeletal indexes ∠SNA, ∠SNB, ∠ANB and ∠MP-FH between the two groups before and after treatment. The dental indexes ∠UI-SN, ∠UI-PP, ∠L1-MP, ∠U1-L1, UIA PTV, UIE-PTV, LIE-PTV, LIA-PTV, UM-PTV, LM-PTV and soft tissue indexes UL-EP, LL- . There was no significant difference between the two groups after treatment. Conclusions Empower dual-core self-ligating braces orthodontics to correct the malocclusion of both odontoid arch prosthesis, and obtain better support control and anterior teeth torque control. The adduction of upper and lower anterior teeth is significant and the soft tissue profile is improved obviously.