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机构地区:[1]第四军医大学口腔医院正畸科,西安710032
出 处:《实用口腔医学杂志》2011年第2期222-225,共4页Journal of Practical Stomatology
摘 要:目的:研究安氏Ⅲ类错患者下颌骨生长发育特点,为安氏Ⅲ类错的矫治提供参考。方法:899例安氏Ⅲ类错患者按照性别和不同的CVM分期(cervical vertebral maturation method)分组,测量治疗前的X线头影片,分析处于不同生长发育期的安氏Ⅲ类错患者下颌骨生长发育的特点。结果:男性安氏Ⅲ类错患者下颌升支的高度(Co-Go)在CS2-CS5期增长显著(P<0.05),面下1/3的高度(L1-MP)在CS1与CS2期之间以及CS3与CS4期之间有明显增长(P<0.05);女性患者下颌升支高度在CS1-CS4期均出现显著增长(P<0.05),下颌骨体长度(Go-Gn)在CS3与CS4期有显著增长(P<0.05)。男性患者在CS3-CS4期下颌骨体长度生长最为显著(平均4.8 mm),女性则出现在CS1-CS2期(平均5.2 mm)。结论:安氏Ⅲ类错患者下颌骨的水平向及垂直向生长在两个生长发育期(CS1-CS2期以及CS3-CS4期)都极为迅速,且可一直持续到成人前期(CS5-CS6期)。Objective: To investigate the characteristics of mandibular growth in untreated Class Ⅲ maloccusion subjects.Methods: The cross-sectional sample came from 899 patients with untreated Class Ⅲ malocclusion including 401 males and 498 females.The subjects were divided to six consecutive developmental periods according to cervical vertebral maturation method.Their cephalograms were measured and analyzed.Results: In the males the height of mandibular ramus(Co-Go) increased significantly from CS2 to CS5(P0.05);the length of mandible(L1-MP) increased(P0.05) in CS1-CS2 and CS3-CS4 periods.In the females the height of mandibular ramus(Co-Go) increased from CS1 to CS4 period(P0.05);the length of mandibula(Go-Gn) increased at CS3-CS4 period(P0.05).The maximum increase of mandibular length appeard at CS3-CS4(4.8 mm)in males,and at CS1-CS2(5.2 mm)in females.Conclusion: Mandibular growth in Class Ⅲ maloccusion subjects increases significantly at two growth spurt intervals(CS1-CS2 and CS3-CS4) in sagittal and vertical direction,and this growth can persist to early adulthood period(CS5-CS6).
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