Altan Ahmet, Akbulut Nihat
Dept. of Oral and Maxillofacial Surgery, Faculty of Dentistry, Gaziosmanpaşa University, Tokat, Turkey.
J Dent (Shiraz). 2019 Mar;20(1):48-52. doi: 10.30476/DENTJODS.2019.44563.
The removal of a third molar tooth associated with a pathological condition is usually an easy decision. However, it is necessary for clinicians to know about the prevalence of preoperative pathologies associated with impacted mandibular third molars to the identification of the prophylactic approach to be applied to symptom-free impacted third molars.
The objective was to investigate the effect of the angulation of impacted mandibular third molars on the prevalence of associated pathologies.
In this retrospective study, we examined the panoramic radiographs of 954 patients referred for impacted third molar surgery. A total of 1598 impacted mandibular third molar teeth were included in the study. Pathological conditions included the caries on distal surface of the adjacent second molar, caries on impacted mandibular third molars, bone loss distal to the adjacent second molar, the radiolucent area distal to the impacted mandibular third molar were determined.
Caries were observed more in the impacted third molar (18.9%) compared to the adjacent second molar (15.8%). The radiolucent area on distal surface of the impacted mandibular molar was 11%, while the periodontal bone loss distal to the adjacent second molar was 4.9%. Mesioangular-impacted mandibular third molars had high risk of caries development on second and third molar. The prevalence of periodontal tissue damage to the adjacent second molar was higher in horizontal and mesioangular angulation. Vertical and distoangular-impacted mandibular third molars had high risk for bone loss at distal aspect.
The prevalence rate of pathological conditions in mesioangular impacted teeth was higher.
拔除伴有病理状况的第三磨牙通常是一个容易做出的决定。然而，临床医生有必要了解与下颌阻生第三磨牙相关的术前病理状况的发生率，以便确定适用于无症状阻生第三磨牙的预防方法。
目的是研究下颌阻生第三磨牙的角度对相关病理状况发生率的影响。
在这项回顾性研究中，我们检查了954例因阻生第三磨牙手术而转诊患者的全景X线片。共有1598颗下颌阻生第三磨牙纳入研究。确定的病理状况包括相邻第二磨牙远中面龋、下颌阻生第三磨牙龋、相邻第二磨牙远中骨质丧失、下颌阻生第三磨牙远中透射区。
与相邻第二磨牙（15.8%）相比，阻生第三磨牙的龋患率更高（18.9%）。下颌阻生磨牙远中面的透射区为11%，而相邻第二磨牙远中牙周骨质丧失为4.9%。近中阻生下颌第三磨牙在第二和第三磨牙发生龋病的风险较高。水平和近中倾斜角度的下颌阻生第三磨牙对相邻第二磨牙牙周组织损伤的发生率更高。垂直和远中倾斜的下颌阻生第三磨牙远中侧骨质丧失风险较高。
近中阻生牙的病理状况发生率较高。
