成人骨性Ⅱ类与Ⅲ类错畸形伴异常垂直骨面型的颏联合形态研究被引量：17

Morphological characteristics of mandibular symphysis in adult skeletal Class Ⅱ and Class Ⅲ malocclusions with abnormal vertical skeletal patterns

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摘要目的研究异常垂直骨面型的成人骨性Ⅱ类与Ⅲ类错的颏联合形态是否存在差异。方法选择109例中国成年女性骨性错畸形患者为研究对象,根据垂直骨面型和矢状骨面型分为4组:高角骨性Ⅱ类组30例,高角骨性Ⅲ类组25例,低角骨性Ⅱ类组29例,低角骨性Ⅲ类组25例。拍摄X线头颅侧位片,测量颏联合形态相关指标,观察并比较4组的颏联合形态。结果成人骨性Ⅱ类与骨性Ⅲ类错的颏联合存在形态差异,但整体厚度和高度差别不大。高角组中,骨性Ⅱ类比骨性Ⅲ类有较大的下牙槽高度、较小的颏突度和基骨高度(P<0.01);低角组中,骨性Ⅱ类比骨性Ⅲ类有较大的下牙槽高度(P<0.05)和下牙槽顶部厚度(P<0.001)。矢状骨面型相同时,高角组比低角组有较小的颏厚度、颏突度和较大的颏联合总高度(骨性Ⅱ类组P<0.001,骨性Ⅲ类组P<0.05),并且更易出现下牙槽基部薄于顶部的葫芦形颏部(P<0.01)。结论异常垂直骨面型的成人骨性Ⅱ类与骨性Ⅲ类错畸形者,颏联合形态存在差异,垂直骨面型对颏联合形态的影响大于矢状骨面型,高角骨性错畸形者移动下切牙的正畸风险较大。 Objective To figure out the differences of the morphological characteristics of mandibular symphysis between Class Ⅱ and Class Ⅲ adult skeletal malocclusions with different abnormal vertical skeletal patterns.Methods 109 Chinese female adults of skeletal Class Ⅱ and Class Ⅲ were chosen and divided into four groups according to vertical and sagittal skeletal pattern：Class Ⅱ-vertical-growth-pattern group（n=30）,Class Ⅲ-vertical-growth-pattern group（n=25）,Class Ⅱ-horizontal-growth-pattern group（n=29）,Class Ⅲ-horizontal-growth-pattern（n=25）.Lateral cephalograms were taken.The symphyseal widths and heights,along with lower incisor positions were evaluated.Observation and statistics analysis were done to clarify the morphological characteristics of the symphyseal region of different skeletal patterns.Results There were morphological differences of symphyseal region between Class Ⅱ and Class Ⅲ skeletal malocclusions,but not significant in width and total height.With a vertical-growth-pattern,Class Ⅱ malocclusions had higher alveolus than Class Ⅲ,but smaller chin prominence and lower basal bone（P〈0.01）.With a horizontal-growth-pattern,Class Ⅱ malocclusions had higher alveolus（P〈0.05） and larger alveolar top width（P〈0.001）.With a same sagittal skeletal pattern,vertical-growth-pattern group had thinner but higher symphyseal region and bigger chin prominence（P〈0.001 in Class Ⅱ while P〈0.05 in Class Ⅲ）.Besides,a vertical-growthpattern malocclusion was prone to have a cucurbit-morph chin,of which Id width was larger than basal width（P 0.01）.Conclusion There are morphological differences in symphyseal region between Class Ⅱ and Class Ⅲ skeletal malocclusions with different abnormal vertical skeletal patterns.The influence of abnormal vertical skeletal pattern to symphyseal morphological characteristics is greater than that of abnormal sagittal skeletal pattern.There is a risk of orthodontic movement of low incisors in vertical-growth-pattern skeletal malocclusion.

作者唐娜赵志河廖春晖赵美英

机构地区四川大学华西口腔医院正畸科

出处《华西口腔医学杂志》 CAS CSCD 北大核心 2010年第4期395-398,共4页 West China Journal of Stomatology

关键词垂直骨面型矢状骨面型骨性Ⅱ类错[牙合] 骨性Ⅲ类错[牙合] 颏联合 vertical skeletal pattern sagittal skeletal pattern skeletal Class Ⅱ malocclusion skeletal Class Ⅲ malocclusion mandibular symphysis

分类号 R783.5 [医药卫生—口腔医学]

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