Srivastava Nikhil, Shetty Akshay, Goswami Rahul Dev, Apparaju Vijay, Bagga Vivek, Kale Saurabh
Department of Oral and Maxillofacial Surgery, Sri Rajiv Gandhi College of Dental Sciences and Hospital, Bengaluru, Karnataka, India.
Department of Oral medicine and Radiology, Sri Rajiv Gandhi College of Dental Sciences and Hospital, Bengaluru, Karnataka, India.
Int J Appl Basic Med Res. 2017 Jan-Mar;7(1):15-19. doi: 10.4103/2229-516X.198505.
Removal of impacted third molars is the most common oral surgical procedure. Many investigators have questioned the necessity of removal in patients who are free of symptoms or associated pathologies.
The aim of this retrospective study was to evaluate the incidence of caries on distal aspect of mandibular second molars in patients referred for corresponding third molar assessment and to identify its association with angular position and depth of the impacted mandibular third molars based on the classification of Pell and Gregory.
Records of 150 patients with impacted third molar presenting to the Department of Oral and Maxillofacial Surgery, Sri Rajiv Gandhi College of Dental Sciences and Hospital, were assessed retrospectively. The radiographic angulation and depth of mandibular third molar impaction were determined and compared to determine the relationship with incidence of caries on the distal surface of the second molar.
According to this study results, 37.5% cases show caries on the distal aspect of mandibular second molars. The incidence of caries with mesioangular impacted third molars was 55%. A majority of these mesioangular cases were Level B and Class I as per the Pell and Gregory classification.
The prophylactic extraction of mandibular third molars is indicated if the angulation is between 30° and 70° and is justified by incidence of distal caries in the second molars.
拔除阻生第三磨牙是最常见的口腔外科手术。许多研究者对无症状或无相关病变患者拔除第三磨牙的必要性提出了质疑。
这项回顾性研究的目的是评估因相应第三磨牙评估而转诊的患者下颌第二磨牙远中面龋病的发生率，并根据佩尔和格雷戈里分类法确定其与下颌阻生第三磨牙的角度位置和深度的关系。
对在斯里·拉吉夫·甘地牙科学院和医院口腔颌面外科就诊的150例阻生第三磨牙患者的记录进行回顾性评估。确定下颌第三磨牙阻生的放射学角度和深度，并进行比较，以确定与第二磨牙远中面龋病发生率的关系。
根据本研究结果，37.5%的病例在下颌第二磨牙远中面出现龋病。近中阻生第三磨牙的龋病发生率为55%。根据佩尔和格雷戈里分类，这些近中阻生病例大多数为B级和I类。
如果角度在30°至70°之间，下颌第三磨牙的预防性拔除是必要的，并且第二磨牙远中龋的发生率证明了这一点。
