Hashem Atef A, O'Connell Brian, Nunn June, O'Connell Anne, Garvey Therese, O'Sullivan Michael
Division of Restorative Dentistry & Periodontology, Dublin Dental School & Hospital, Lincoln Place, Dublin 2.
J Ir Dent Assoc. 2010 Feb-Mar;56(1):23-7.
This study was carried out to determine the prevalence, severity and pattern of hypodontia in Irish patients referred to a tertiary care clinic for developmental dental disorders.
Details of 168 patients with hypodontia referred during the period 2002-2006 were entered in a database designed as a national record. Tooth charting was completed using clinical and radiographic examinations. The age of patients ranged from 7-50 years, with a median age of 20 years (Mean: 21.79; SD: 8.005).
Hypodontia referrals constituted 65.5% of the total referrals. Females were more commonly affected than males with a ratio of 1.3:1. The number of referrals reflected the population density in this area; the majority were referrals from the public dental service. Mandibular second premolars were the most commonly missing teeth, followed by maxillary second premolars and maxillary lateral incisors; maxillary central incisors were the least affected. Symmetry of tooth agenesis between the right and left sides was an evident feature. Slightly more teeth were missing on the left side (n = 725) than on the right side (n = 706) and in the maxillary arch (n = 768) as compared to the mandibular arch (n = 663). Some 54% of patients had severe hypodontia with more than six teeth missing; 32% had moderate hypodontia, with four to six teeth missing. The most common pattern of tooth agenesis was four missing teeth.
Hypodontia was a common presentation in a population referred to this tertiary care clinic. The pattern and distribution of tooth agenesis in Irish patients appears to follow the patterns reported in the literature.
本研究旨在确定转诊至三级护理诊所治疗发育性牙病的爱尔兰患者中缺牙症的患病率、严重程度和模式。
将2002年至2006年期间转诊的168例缺牙症患者的详细信息录入一个设计为国家记录的数据库。通过临床和影像学检查完成牙齿绘图。患者年龄在7至50岁之间，中位年龄为20岁（平均：21.79；标准差：8.005）。
缺牙症转诊患者占总转诊患者的65.5%。女性比男性更易受影响，比例为1.3:1。转诊数量反映了该地区的人口密度；大多数转诊来自公共牙科服务机构。下颌第二前磨牙是最常缺失的牙齿，其次是上颌第二前磨牙和上颌侧切牙；上颌中切牙受影响最小。左右两侧牙齿发育不全的对称性是一个明显特征。左侧缺失的牙齿略多于右侧（n = 725），上颌牙弓（n = 768）比下颌牙弓（n = 663）缺失的牙齿更多。约54%的患者患有严重缺牙症，缺失超过六颗牙齿；32%的患者患有中度缺牙症，缺失四至六颗牙齿。最常见的牙齿发育不全模式是四颗牙齿缺失。
缺牙症在转诊至该三级护理诊所的人群中是一种常见表现。爱尔兰患者牙齿发育不全的模式和分布似乎遵循文献中报道的模式。
