摘要
目的通过分析错(牙合)畸形患者软硬组织面型的差异,了解软组织的分布规律,加深对错(牙合)畸形患者面型构成的认识。方法选择144例12-15岁女性错(牙合)畸形患者为研究对象,根据治疗前头颅侧位片上∠ANB大小划分 I、Ⅱ、Ⅲ类骨型,每类骨型各有48例患者,要求(牙合)型与骨型一致。在头颅侧位片上测量反映软硬组织矢状面型和唇、前牙突度的4对指标:∠SnNsB′、∠ANB、∠NsSnPos、∠NAPo、UL-SnPos、UI-APo、LL-SnPos和LI-APo。分类统计各骨型组中软组织矢状面型的分布。计算各组∠SnNsB′-∠ANB、∠NsSnPos-∠NAPo、UL-SnPos-UI- APo、LL-SnPos-LI-APo差值的均值和分布范围以及正差值与负差值的分布概率。用卡方检验比较组间正差值、负差值的概率分布有无差异,用单因素方差分析比较每对指标平均差值组间有无差异。结果 20％-30％的患者存在着软硬组织矢状面型不一致的现象;软硬组织形态差异的变异范围较广;随着Ⅱ、I、Ⅲ类骨型的变化,软组织覆盖越来越倾向于增加侧貌凸度、增加上唇突度和减小下唇突度。结论在群体水平上,软组织覆盖有掩饰颌骨和牙(牙合)发育异常的趋势;就个体而言,软组织形态具有一定的独立性,需重视其对矫治设计和矫治结果的影响。
Objective To study the characteristics of soft-tissue integument and the differences between soft-tissue and hard-tissue topography in malocclusions. Methods 144 female patients, 12-15 years old, were selected. They were divided into class Ⅰ, class Ⅱand class Ⅲ groups according to the value of ∠ANB which was measured on the pre-treatment cephalographs. Each group had 48 patients. Each patient had same type of skeletal pattern and occlusal pattern, full set of permanent teeth and none of eranofacial soft-tissue and hard-tissue diseases. 4 pairs of measurements describing soft-tissue and hard-tissue sagittal facial pattern and the prominence of lips and incisors were measured on each cephalograph. They were ∠SnNsBt, ∠ANB, ∠NsSnPos, ∠NAPo, UL-SnPos, UI-APo, LL-SnPos and LI-APo. The distribution of soft-tissue sagittal facial pattern in each skeletal group was analyzed. The differences between ∠SnNsB＇ and ∠ANB, ∠NsSnPos and ∠NAPo, UL-SnPos and UI-APo, LL-SnPos and LI-APo were calculated in each patient. Then we calculated the means and the ranges of these differences in each group, the probability of positive and negative difference between each pair of measurements in each group were calculated too. X^2 test on those probabilities were performed between the three groups. The mean difference between each pair of measurements was then analyzed by ANOVA between the three groups. Results The disharmony between soft-tissue and hard-tissue sagittal facial pattern was found in 20%-30% of malocclusion patients. There were more or less differences between soft-tissue and hard-tissue topography and the ranges of their variation were quite wide. The softtissue integument increasingly tended to augment the convexity of soft-tissue facial profile when skeletal pattern varied from class Ⅱto class Ⅰto class Ⅲ, at the same time, tended to increase upper lip prominence and decrease lower lip prominence. Conclusion On the average, soft-tissue integument tends to camouflage the abnormality of hard-tissue topography. But as to individual, the relative independence of soft-tissue integument makes it important to notice the influence of soft tissue on treatment planning and results.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2006年第2期138-141,共4页
West China Journal of Stomatology
关键词
错(牙合)畸形
软组织覆盖特征
面型
骨型
malocclusion
integument characteristics
facial pattern
skeletal pattern
