Department of Oral and Maxillofacial Diseases, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
Department of Oral and Maxillofacial Diseases, Helsinki University Hospital, Helsinki, Finland.
Clin Oral Investig. 2024 Jul 24;28(8):443. doi: 10.1007/s00784-024-05845-6.
The study aimed to examine the authenticity of the often-mentioned statement that the third molar is the most frequently extracted tooth. This finding has not been shown previously in a large population-based sample.
Data comprised a nationally representative sample of 6082 panoramic radiographs taken from adults in the cross-sectional Health 2000 Survey. From the radiographs, all missing teeth were recorded. Information on congenital agenesis of individual teeth was retrieved from two published meta-analyses. Primary outcome was the frequency of missing teeth by tooth type. Explanatory variables were age, sex, and the jaw (maxilla/mandible). Statistical analyses included χ test and binomial logistic regression.
Mean age of participants (46% men, 54% women) was 53 years (SD 14.6; range 30‒97 years). Missing teeth occurred more often in women than in men (P < 0.001). The third molar was most frequently missing and the canine least frequently. In the maxilla and mandible, the third molar was missing more often than each of the other tooth types up to the age of 80 years (P < 0.01).
When considering the rates of congenital agenesis of individual teeth, it is concluded that the third molar remained the most common tooth extracted up till the age of 80 years.
The third molar is the most common target for extraction, but also the most common tooth associated with malpractice claims, and therefore, calls for skills, adequate equipment, and other resources for a successful extraction.
本研究旨在检验一个常被提及的说法的真实性，即第三磨牙是最常被拔除的牙齿。此前，尚未在大规模基于人群的样本中证明这一发现。
数据来自横断面健康 2000 调查中成年人的全国代表性样本，共 6082 张曲面断层片。从这些射线照片中记录了所有缺失的牙齿。个别牙齿先天缺失的信息来自两项已发表的荟萃分析。主要结果是按牙齿类型缺失的牙齿频率。解释变量为年龄、性别和颌骨（上颌骨/下颌骨）。统计分析包括卡方检验和二项逻辑回归。
参与者的平均年龄（46%为男性，54%为女性）为 53 岁（SD 14.6；范围 30‒97 岁）。女性缺失牙齿的频率高于男性（P < 0.001）。第三磨牙最常缺失，犬齿最不易缺失。在上颌骨和下颌骨中，第三磨牙在 80 岁之前比其他任何牙齿类型缺失的频率都更高（P < 0.01）。
考虑到个别牙齿先天缺失的比率，可得出结论，第三磨牙仍然是 80 岁之前最常被拔除的牙齿。
第三磨牙是最常见的拔牙目标，但也是最常与医疗事故索赔相关的牙齿，因此，需要具备拔牙的技能、充足的设备和其他资源。
