Alassiry Ahmed
Department of Preventive Dental Sciences, Faculty of Dentistry, Najran University, Saudi Arabia.
Saudi Dent J. 2020 Mar;32(3):155-159. doi: 10.1016/j.sdentj.2019.08.002. Epub 2019 Aug 27.
The objective of this study is to assess the prevalence and pattern of maxillary canine impaction (MCI) in the population of Saudi Arabia according to the Yamamoto classification.
A total of 5000 orthopantomogram (OPG) images of 2500 males and 2500 females in the age group of 14-40 years who attended the orthodontic clinic in Najran city from a period between January 2016 to February 2019 were evaluated for the presence of maxillary canine impaction. The anatomical position of each maxillary canine impaction was matched to the seven subtypes mentioned in the Yamamoto's classification.
The prevalence of MCI was found to be 3.46% in Najran(Saudi Arabia) population. Type I (46%) accounted for the highest prevalence followed by Type II (37%) and Type VI (8%). Type III, V and VII was found to be 3% equally and no case was of Type IV was found in the studied population. MCI was more common in females and left side compared to males and right side respectively.
The prevalence of maxillary canine impaction was found to be 3.46% in Najran. Type I pattern of maxillary canine impaction was commonest followed by Type II, VI, III, V and VII.
本研究的目的是根据山本分类法评估沙特阿拉伯人群中上颌尖牙阻生（MCI）的患病率和模式。
对2016年1月至2019年2月期间在纳季兰市正畸诊所就诊的2500名年龄在14 - 40岁之间的男性和2500名女性的5000张全景X线片（OPG）图像进行评估，以确定是否存在上颌尖牙阻生。将每个上颌尖牙阻生的解剖位置与山本分类中提到的七种亚型进行匹配。
在纳季兰（沙特阿拉伯）人群中，MCI的患病率为3.46%。I型（46%）的患病率最高，其次是II型（37%）和VI型（8%）。III型、V型和VII型的患病率均为3%，在研究人群中未发现IV型病例。MCI在女性中比男性更常见，在左侧比右侧更常见。
在纳季兰发现上颌尖牙阻生的患病率为3.46%。上颌尖牙阻生的I型模式最常见，其次是II型、VI型、III型、V型和VII型。
