头帽牵引和推杆式矫治器在安氏Ⅱ~1错矫治中的应用研究

Treatment Effects of Class 2 Malocclussion with Headgear-Forsus

目的:观察头帽牵引推杆式矫治器联合应用对生长期的安Ⅱ1错牙合患者牙、颌、颅面产生的影响。方法:选取42例青春生长期的安氏Ⅱ1错牙合患者。正常对照组2 2例(男10例,女12例) ,治疗组2 0例(男8例、女12例) ,以治疗8个月前后的X线头影测量方法评价疗效。对照组在8个月前后拍摄X线头颅侧位片,以排除自然生长对本研究的影响。结果:平均治疗期的疗效是抑制上颌骨的生长,促进下颌骨的生长,尤其是垂直向生长效果明显。SNA、ANB、OJ、UI/SN、UL Eline、LL Eline等在治疗后减小,有显著性差异。SNB、L1/MP、U1/EI、Co Go、Go Pg、鼻唇角和颏唇角在治疗后增大,有显著性差异。下颌平面角和下面高无显著性变化。结论:头帽牵引和推杆式矫治器联合应用更适合于矫治上颌矢状向、垂直向发育过度和下颌发育不足的安氏Ⅱ类错牙合。在生长发育期的Ⅱ类错牙合患者的治疗中可以减小覆牙合覆盖,改善牙合关系并快速有效的改善患者下颌后缩的面型。

Objective:To evaluate the skeletal and dental changes during treatment 8 months With headgear-Forsus.Method:The sample consisted of 42 patients with classⅡ malocclusions. The sample lomprisell of 20. Treated patients and 22 controls. Lateral cephalo-grams were obtained at start after 8 months of active treatement.and the controls too.Result:The restraint effect on the maxilla was significant in both initial and late phase.the enhanced growth of the mandible was significant in the same time . After treat ment of headgear-Forsus. the SNA and ANB angles. OJ UI/SN UL-ELine . LL-Eline of the patients were decreased significantly; the SNB.LI/MP U1/L1 angles. And CO-GO GO-Pg increased significant. The change mandibular plane angle and lowerfacial height was not siginificant.Conclusion:The Headgear-Forsus was effective orthopedic devise Dentoalveolar change and orthopedic effects in both jaws result in the improvement in dental and skeletal relation ships.