Udoye Christopher I, Jafarzadeh Hamid
Faculty of Dentistry, College of Medicine University of Nigeria, Enugu Campus, Nigeria.
Dent Traumatol. 2009 Aug;25(4):439-41. doi: 10.1111/j.1600-9657.2009.00796.x.
Dilaceration is the result of a developmental anomaly in which an abrupt change in the axial inclination between crown and root is observed. Its prevalence in various races is different and its association with history of trauma is controversial. This study assessed the prevalence and distribution of dilacerated teeth among Nigerians and also investigated whether there was a relation between a history of trauma and teeth that had dilaceration. A total of 465 records of adult attendees (involving 706 teeth and 256 films) were retrospectively studied. Dilacerated teeth were scored using Hamasha et al.'s criteria. Dilaceration occurred more often in the maxilla, posterior teeth and in women, though no association between a history of trauma and occurrence of dilaceration was found. Prevalence of dilaceration in the population and in all teeth was 4.5% and 2.97%, respectively. Dentists should pay detailed attention to baseline radiographs, especially in maxilla and posterior teeth.
牙折曲是一种发育异常的结果，在这种情况下，牙冠和牙根之间的轴向倾斜会出现突然变化。其在不同种族中的患病率不同，并且其与创伤史的关联存在争议。本研究评估了尼日利亚人牙折曲牙齿的患病率和分布情况，还调查了创伤史与牙折曲牙齿之间是否存在关联。对465名成年就诊者的记录（涉及706颗牙齿和256张牙片）进行了回顾性研究。使用哈马沙等人的标准对牙折曲牙齿进行评分。牙折曲在上颌、后牙和女性中更常发生，尽管未发现创伤史与牙折曲发生之间存在关联。人群中牙折曲的患病率和所有牙齿中牙折曲的患病率分别为4.5%和2.97%。牙医应特别关注基线牙片，尤其是在上颌和后牙。
