PDF(Pubmed)
Abstract：
UNASSIGNED: To investigate craniofacial differences in individuals with hypodontia and explore the relationship between craniofacial features and the number of congenitally missing teeth.
UNASSIGNED: A cross-sectional study was conducted among 261 Chinese patients (males, 124; females, 137; age, 7-24 years), divided into four groups (without hypodontia: no teeth missing, mild: one or two missing teeth, moderate: three to five missing teeth, severe: six or more missing teeth) according to the number of congenitally missing teeth. Differences in cephalometric measurements among the groups were analyzed. Further, multivariate linear regression and smooth curve fitting were performed to evaluate the relationship between the number of congenitally missing teeth and the cephalometric measurements.
UNASSIGNED: In patients with hypodontia, SNA, NA-AP, FH-NA, ANB, Wits, ANS-Me/N-Me, GoGn-SN, UL-EP, and LL-EP significantly decreased, while Pog-NB, AB-NP, N-ANS, and S-Go/N-Me significantly increased. In multivariate linear regression analysis, SNB, Pog-NB, and S-Go/N-Me were positively related to the number of congenitally missing teeth. In contrast, NA-AP, FH-NA, ANB, Wits, N-Me, ANS-Me, ANS-Me/N-Me, GoGn-SN, SGn-FH (Y-axis), UL-EP, and LL-EP were negatively related, with absolute values of regression coefficients ranging from 0.147 to 0.357. Further, NA-AP, Pog-NB, S-Go/N-Me, and GoGn-SN showed the same tendency in both sexes, whereas UL-EP and LL-EP were different.
UNASSIGNED: Compared with controls, patients with hypodontia tend toward a Class III skeletal relationship, reduced lower anterior face height, flatter mandibular plane, and more retrusive lips. The number of congenitally missing teeth had a greater effect on certain characteristics of craniofacial morphology in males than in females.
UNASSIGNED: A cross-sectional study was conducted among 261 Chinese patients (males, 124; females, 137; age, 7-24 years), divided into four groups (without hypodontia: no teeth missing, mild: one or two missing teeth, moderate: three to five missing teeth, severe: six or more missing teeth) according to the number of congenitally missing teeth. Differences in cephalometric measurements among the groups were analyzed. Further, multivariate linear regression and smooth curve fitting were performed to evaluate the relationship between the number of congenitally missing teeth and the cephalometric measurements.
UNASSIGNED: In patients with hypodontia, SNA, NA-AP, FH-NA, ANB, Wits, ANS-Me/N-Me, GoGn-SN, UL-EP, and LL-EP significantly decreased, while Pog-NB, AB-NP, N-ANS, and S-Go/N-Me significantly increased. In multivariate linear regression analysis, SNB, Pog-NB, and S-Go/N-Me were positively related to the number of congenitally missing teeth. In contrast, NA-AP, FH-NA, ANB, Wits, N-Me, ANS-Me, ANS-Me/N-Me, GoGn-SN, SGn-FH (Y-axis), UL-EP, and LL-EP were negatively related, with absolute values of regression coefficients ranging from 0.147 to 0.357. Further, NA-AP, Pog-NB, S-Go/N-Me, and GoGn-SN showed the same tendency in both sexes, whereas UL-EP and LL-EP were different.
UNASSIGNED: Compared with controls, patients with hypodontia tend toward a Class III skeletal relationship, reduced lower anterior face height, flatter mandibular plane, and more retrusive lips. The number of congenitally missing teeth had a greater effect on certain characteristics of craniofacial morphology in males than in females.
摘要：
■调查患有低牙症的个体的颅面差异，并探讨颅面特征与先天性缺失牙齿数量之间的关系。
■对261名中国患者（男性，124；女性，137岁，7-24年),分为四组(没有牙体发育不全:没有牙齿缺失，轻度：一个或两个牙齿缺失，中度：三至五颗牙齿缺失，严重的：六个或更多的牙齿缺失），根据先天性牙齿缺失的数量。分析了各组之间头颅测量的差异。Further,进行多元线性回归和平滑曲线拟合，以评估先天性缺失牙齿数量与头影测量之间的关系。
■在患者中，SNA,NA-AP,FH-NA,ANB,Wits,ANS-Me/N-Me,GoGn-SN,UL-EP,LL-EP显著下降，而Pog-NB,AB-NP,N-ANS,S-Go/N-Me显著增加。在多元线性回归分析中，SNB,Pog-NB,S-Go/N-Me与先天性缺牙数量呈正相关。相比之下,NA-AP,FH-NA,ANB,Wits,N-Me,ANS-我,ANS-Me/N-Me,GoGn-SN,SGn-FH（Y轴），UL-EP,和LL-EP呈负相关，回归系数的绝对值在0.147到0.357之间。Further,NA-AP,Pog-NB,S-Go/N-Me,GoGn-SN在两性中表现出相同的趋势，而UL-EP和LL-EP不同。
■与对照组相比，有低聚症的患者倾向于III类骨骼关系，降低前脸高度，平坦的下颌平面，和更富有生气的嘴唇。先天性缺失牙齿的数量对男性颅面形态的某些特征的影响大于女性。
■对261名中国患者（男性，124；女性，137岁，7-24年),分为四组(没有牙体发育不全:没有牙齿缺失，轻度：一个或两个牙齿缺失，中度：三至五颗牙齿缺失，严重的：六个或更多的牙齿缺失），根据先天性牙齿缺失的数量。分析了各组之间头颅测量的差异。Further,进行多元线性回归和平滑曲线拟合，以评估先天性缺失牙齿数量与头影测量之间的关系。
■在患者中，SNA,NA-AP,FH-NA,ANB,Wits,ANS-Me/N-Me,GoGn-SN,UL-EP,LL-EP显著下降，而Pog-NB,AB-NP,N-ANS,S-Go/N-Me显著增加。在多元线性回归分析中，SNB,Pog-NB,S-Go/N-Me与先天性缺牙数量呈正相关。相比之下,NA-AP,FH-NA,ANB,Wits,N-Me,ANS-我,ANS-Me/N-Me,GoGn-SN,SGn-FH（Y轴），UL-EP,和LL-EP呈负相关，回归系数的绝对值在0.147到0.357之间。Further,NA-AP,Pog-NB,S-Go/N-Me,GoGn-SN在两性中表现出相同的趋势，而UL-EP和LL-EP不同。
■与对照组相比，有低聚症的患者倾向于III类骨骼关系，降低前脸高度，平坦的下颌平面，和更富有生气的嘴唇。先天性缺失牙齿的数量对男性颅面形态的某些特征的影响大于女性。
