Albashaireh Zakereyya S M, Khader Yousef S
Department of Restorative Dentistry, Faculty of Dentistry, Jordan University of Science & Technology, P.O. Box 3030, Irbid 22110, Jordan.
Community Dent Health. 2006 Dec;23(4):239-43.
The aim of this study was to determine the prevalence and pattern of hypodontia and the extent of congenital malformation in the permanent teeth of a sample of Jordanian adults.
Clinical examinations were carried out on 1045 dental patients aged 16 to 45 years to record any congenital absence of teeth except 3rd molars and to note any crown shape or size deformities affecting the upper lateral incisor. The congenital absence of permanent teeth was confirmed by taking complete dental history and orthopantomograms. Impacted teeth and teeth lost as a consequence of extraction or trauma were recorded as present.
The prevalence of hypodontia was found to be 5.5% of the sample and the lower second premolar was the most frequently missing tooth. The number of missing upper lateral incisors was significantly higher than that of lower lateral incisors, (p < 0.05). Peg-shaped and reduced size upper lateral incisors were observed in 2.3% and 2.9% of the sample respectively. There were no significant differences according to gender, location of tooth according to arch or side of the jaw and hypodontic pattern.
The prevalence of hypodontia was 5.5%, that of peg-shaped lateral incisor was 2.3% and that of reduced crown size was 2.9%.
本研究旨在确定约旦成年人群样本中恒牙列缺牙症的患病率及模式，以及先天性畸形的程度。
对1045名年龄在16至45岁的牙科患者进行临床检查，以记录除第三磨牙外的任何先天性缺牙情况，并记录影响上颌侧切牙的任何冠部形状或大小畸形。通过获取完整的牙科病史和口腔全景X线片来确认恒牙的先天性缺失。记录阻生牙以及因拔牙或外伤而缺失的牙齿。
发现缺牙症的患病率为样本的5.5%，下颌第二前磨牙是最常缺失的牙齿。上颌侧切牙缺失的数量显著高于下颌侧切牙（p < 0.05）。样本中分别有2.3%和2.9%的人观察到钉状和尺寸减小的上颌侧切牙。根据性别、牙弓中牙齿的位置或颌骨的侧别以及缺牙模式，均无显著差异。
缺牙症的患病率为5.5%，钉状侧切牙的患病率为2.3%，冠部尺寸减小的患病率为2.9%。
