第三磨牙阻生的患病率及模式：阿曼X光片的回顾性研究
Prevalence and Pattern of Third Molar Impaction: A retrospective study of radiographs in Oman.
作者信息
Al-Anqudi Samira M, Al-Sudairy Salim, Al-Hosni Ahmed, Al-Maniri Abdullah
机构信息
Department of Oral Health, Sultan Qaboos University Hospital, Muscat, Oman;
Data Management Department, Petroleum Development Oman;
出版信息
Sultan Qaboos Univ Med J. 2014 Aug;14(3):e388-92. Epub 2014 Jul 24.
OBJECTIVES
The aim of this retrospective study was to investigate the prevalence and pattern of third molar impaction in patients between 19-26 years old attending Sultan Qaboos University Hospital (SQUH) in Muscat, Oman.
METHODS
The study reviewed 1,000 orthopantomograms (OPGs) of patients attending the Oral Health Department of SQUH between October 2010 and April 2011. Patients were evaluated to determine the prevalence of third molar impaction, angulation, level of eruption and associated pathological conditions.
RESULTS
Of the study population, 543 (54.3%) OPGs showed at least one impacted third molar. The total number of impacted molars was 1,128. The most common number of impacted third molars was two (41%). The most common angulation of impaction in the mandible was the mesioangular (35%) and the most common level of impaction in the mandible was level A. Of the 388 bilateral occurrences of impacted third molars, 377 were in the mandible. There was no significant difference in the frequency of impaction between the right and left sides of both jaws. Pathological conditions associated with impacted lower third molars were found in 18%, of which 14% were associated with a radiographic radiolucency of more than 2.5 mm, and 4% of impacted lower third molars were associated with dental caries.
CONCLUSION
This study found that more than half of Omani adult patients ranging in age from 19-26 years had at least one impacted third molar.
目的
本回顾性研究旨在调查阿曼马斯喀特苏丹卡布斯大学医院（SQUH）19至26岁患者中第三磨牙阻生的患病率及模式。
方法
该研究回顾了2010年10月至2011年4月期间在SQUH口腔健康科就诊患者的1000张口腔全景片（OPG）。对患者进行评估以确定第三磨牙阻生的患病率、角度、萌出水平及相关病理状况。
结果
在研究人群中，543张（54.3%）OPG显示至少有一颗阻生第三磨牙。阻生磨牙总数为1128颗。最常见的阻生第三磨牙数量为两颗（41%）。下颌骨最常见的阻生角度为近中角（35%），下颌骨最常见的阻生水平为A水平。在388例双侧阻生第三磨牙病例中，377例位于下颌骨。上下颌左右两侧阻生频率无显著差异。18%的下颌阻生第三磨牙伴有病理状况，其中14%与超过2.5毫米的放射透光区有关，4%的下颌阻生第三磨牙与龋齿有关。
结论
本研究发现，年龄在19至26岁之间的阿曼成年患者中，超过一半至少有一颗阻生第三磨牙。
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