Chung C J, Han J-H, Kim K-H
Department of Orthodontics, Yongdong Severance Dental Hospital, Institute of Craniofacial Deformity, Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, South Korea.
Oral Dis. 2008 Oct;14(7):620-5. doi: 10.1111/j.1601-0825.2007.01434.x. Epub 2008 Feb 1.
The objective of this study was to evaluate the pattern and prevalence of hypodontia in the Korean population along with its association with the dental and skeletal polymorphisms.
The diagnostic materials including casts, panoramic radiographs, and lateral cephalograms of 1622 Korean subjects (611 males, 1011 females) were used to evaluate the pattern and prevalence of hypodontia as well as its association with the congenital absence of the third molar. The changes in the tooth size and skeletal characteristics of the hypodontia group were evaluated using cast/cephalometric analysis and compared with the standard values of normal occlusion in Koreans.
The prevalence of hypodontia in Koreans was 11.2%. The mandibular lateral incisor and second premolar were the most frequently absent. Congenital absence of the third molar was observed more frequently in the hypodontia group than in the non-hypodontia group. The prevalence of hypodontia in Class III malocclusion was significantly higher than in Class I or Class II malocclusion.
The pattern and prevalence of hypodontia can vary in different ethnic groups. In Koreans, the special features of hypodontia were its association with a higher level of congenital missing third molars and skeletal Class III malocclusion.
本研究的目的是评估韩国人群中缺牙症的模式和患病率，以及其与牙齿和骨骼多态性的关联。
使用1622名韩国受试者（611名男性，1011名女性）的模型、全景X线片和头颅侧位片等诊断材料，评估缺牙症的模式和患病率，以及其与第三磨牙先天性缺失的关联。采用模型/头影测量分析评估缺牙症组牙齿大小和骨骼特征的变化，并与韩国正常咬合的标准值进行比较。
韩国人群中缺牙症的患病率为11.2%。下颌侧切牙和第二前磨牙是最常缺失的牙齿。缺牙症组中第三磨牙先天性缺失的发生率高于非缺牙症组。III类错牙合中缺牙症的患病率显著高于I类或II类错牙合。
不同种族人群中缺牙症的模式和患病率可能有所不同。在韩国人群中，缺牙症的特殊特征是其与较高水平的第三磨牙先天性缺失和骨骼III类错牙合有关。
