Nordgarden Hilde, Jensen Janicke Liaaen, Storhaug Kari
Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, University of Oslo, Oslo, Norway.
Community Dent Health. 2002 Dec;19(4):258-61.
The prevalence of hypodontia (congenital absence of one or more teeth) has been reported to vary between 2.2 and 10.1%, but few studies on the prevalence of oligodontia (congenital absence of six or more permanent teeth, third molars excluded) have been performed. The aims of the present study were to examine the reported prevalence of hypodontia and oligodontia among 18-year-old individuals in two Norwegian counties. A further aim was to examine the distribution of missing teeth in this sample.
The survey was conducted among 18-year-old subjects in the counties of Oslo and Akershus (n = 9,532, 49% females). Public dentists were asked to count registered congenitally missing and extracted teeth.
The reported prevalence of hypodontia was found to be 4.5%, and was significantly higher among females (5.1%) than males (4.0%). The teeth most often missing were the mandibular second premolars (47% of all missing teeth) followed by the maxillary second premolars and lateral incisors (both 20% of all missing teeth). The reported prevalence of oligodontia was found to be 0.084%.
Hypodontia was seen in 450 of 1000 and oligodontia 8.4 of 10.000 persons in this sample.
据报道，缺牙症（先天性缺失一颗或多颗牙齿）的患病率在2.2%至10.1%之间，但关于少牙症（先天性缺失六颗或更多恒牙，不包括第三磨牙）患病率的研究较少。本研究的目的是调查挪威两个郡18岁个体中报道的缺牙症和少牙症患病率。另一个目的是研究该样本中缺失牙齿的分布情况。
对奥斯陆郡和阿克什胡斯郡的18岁受试者进行了调查（n = 9532，49%为女性）。要求公立牙医清点登记的先天性缺失和拔除的牙齿。
发现报道的缺牙症患病率为4.5%，女性（5.1%）明显高于男性（4.0%）。最常缺失的牙齿是下颌第二前磨牙（占所有缺失牙齿的47%），其次是上颌第二前磨牙和侧切牙（均占所有缺失牙齿的20%）。报道的少牙症患病率为0.084%。
在该样本中，每1000人中有450人患有缺牙症，每10000人中有8.4人患有少牙症。
