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目的评价安氏Ⅱ类错畸形患者上下颌骨矢状向不同生长模式对上气道位置形态的影响。方法选取2015年2月至2016年3月就诊于乌鲁木齐市口腔医院正畸科的安氏Ⅱ类均角错畸形汉族男性患者40例,按照78.5°≤SNA角≤86.8°为上颌正常、76.2°≤SNB角≤84.0°为下颌正常标准,将患者分为上下颌正常组(A组)12例、上颌正常下颌后缩组(B组)10例、上颌前突下颌正常组(C组)9例、双颌后缩组(D组)9例。分析患者术前颅面部锥体束计算机断层扫描(CBCT)片。结果上下颌不同生长型组ANB角、FMA角、下颌骨总长、下颌骨体长、ad1-PNS、ad2-PNS、ANS-PNS to PPW、AAO-PNS、P-PP、PH-PPH、ANS-PNS to P角、P-SN及M-SN等差异均有统计学意义(均P<0.05);并且各组间比较结果均有不同程度的差异性,且差异性具有统计学意义。结论安氏Ⅱ类错畸形患者上下颌骨矢状向不同生长模式间口咽部及软腭部形态存在着显著差异,根据生长模式的不同运用合适的矫治器可以在一定程度上改善呼吸。
Objective To evaluate the effect of different modes of sagittal and maxillary mandibular sagittal angioplasty on the location and location of the upper airway in patients with Class Ⅱ malocclusion. Methods Forty Han patients with Angle class Ⅱ malocclusion from March 2015 to March 2016 were enrolled in Department of Orthodontics, Urumqi Stomatological Hospital. According to the criteria of 78.5 ° ≤ SNA ≤ 86.8 °, maxillary normal, 76.2 ° ≤SNB angle≤84.0 ° was the normal standard of mandibular, the patients were divided into upper and lower jaw normal group (group A) 12 cases, maxillary normal mandibular retrusion group (group B) 10 cases, maxillary maxillary protrusion normal group (group C) 9 cases, bimaxillary contraction group (D group) in 9 cases. Analysis of preoperative craniofacial pyramidal tract computed tomography (CBCT) films. Results ANB angle, FMA angle, total mandibular length, mandibular body length, ad1-PNS, ad2-PNS, ANS-PNS to PPW, AAO-PNS, P-PP, PNS to P angle, P-SN, M-SN and other differences were statistically significant (all P <0.05); and the results of the comparison between the groups have varying degrees of difference, and the difference was statistically significant. Conclusion There are significant differences in the shape of pharyngeal and soft palate between sagittal and mandibular sagittal planes in patients with Class Ⅱ malocclusion. According to different growth patterns, appropriate appliance can improve breathing to a certain extent.