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目的观察新型可调Twin-block矫治器双期矫治安氏Ⅱ类1分类错畸形患者软组织侧貌的变化。方法选择我院18例安氏Ⅱ类1分类错畸形,Ⅰ期采用新型可调Twin-block矫治器矫治,根据患者承受力,每2日或1周2次,自行使用专用钥匙加力1/4圈(0.8 mm/圈),每月复诊1次,累计可在矢状向增加总长度约8 mm;Ⅱ期采用直丝弓固定矫治技术矫治。应用X线头影测量技术观察治疗前后软组织侧貌变化。结果本组经2～3年的矫治,组织面型均得到明显改善。治疗后下唇基角、软组织颏凸角、全面凸角、颏唇沟角及软组织面角显著性增加,分别为(83.04±3.05)°、(82.06±3.06)°、(144.78±3.86)°、(128.63±10.36)°及(90.36±2.80)°,与治疗前(79.16±2.83)°、(79.88±2.32)°、(142.23±4.02)°、(116.32±9.18)°及(87.22±3.10)°比较差异具有统计学意义(P<0.05);上唇凸距、H角、下唇突点-H线距离及颏唇沟深度明显减小,分别为(2.67±1.82)mm、(22.6±1.36)°、(0.90±1.00)mm及(6.50±1.30)mm,与治疗前(5.32±1.60)mm、(23.8±1.6)°、(1.40±1.20)mm及(7.10±1.60)mm比较差异也具有统计学意义(P<0.01)。结论新型可调Twin-block矫治器矫治安氏Ⅱ类1分类错,可达到改善面型、矫正深覆盖的目的,使用方便,患者易于接受,值得临床推广应用。
Objective To observe the changes of soft tissue profile in patients with Class Ⅱ division 1 malocclusion treated with new adjustable Twin-block appliance. Methods 18 cases of Class Ⅱ division 1 malocclusion in our hospital were selected. Phase Ⅰ was treated with a new type of adjustable twin-block appliance. According to the patient’s tolerance, every 2 days or 1 week, / 4 laps (0.8 mm / lap), 1 visit per month, the total increase in the sagittal total length of about 8 mm; Ⅱ using straight wire fixation correction treatment. Application of X - cephalometry observation of soft tissue profile changes before and after treatment. Results The group after 2 to 3 years of correction, tissue surface were significantly improved. After treatment, the lower lip base angle, soft tissue chin protuberance, total lobe angle, chin labial groove angle and soft tissue surface angle increased significantly (83.04 ± 3.05), (82.06 ± 3.06) °, (144.78 ± 3.86) ° , (128.63 ± 10.36) ° and (90.36 ± 2.80) °, respectively, compared with 79.16 ± 2.83, 79.88 ± 2.32, 142.23 ± 4.02, 116.32 ± 9.18 and 87.22 ± 3.10 (2.67 ± 1.82) mm and (22.6 ± 2.82) mm, respectively. There was a significant difference between the two groups (P <0.05) 1.36) °, (0.90 ± 1.00) mm and (6.50 ± 1.30) mm, respectively, compared with that before treatment (5.32 ± 1.60) mm, (23.8 ± 1.6) °, (1.40 ± 1.20) mm and (7.10 ± 1.60) mm Also statistically significant (P <0.01). Conclusion The new adjustable Twin-block appliance can cure Class Ⅱ Division 1 malocclusion and achieve the purpose of improving the surface type and correcting deep coverage. It is easy to use and easy to be accepted by patients. It is worthy of clinical application.