Akarslan Zühre Zafersoy, Kocabay Ceyda
Department of Oral Diagnosis and Radiology, Gazi University School of Dentistry, Ankara, Turkey.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Sep;108(3):e26-32. doi: 10.1016/j.tripleo.2009.05.036.
The aim of this study was to evaluate and establish any similarity between the associated symptoms, pathologies, positions, and angulation types of bilateral occurring mandibular third molars among a group of young adult patients.
A total of 342 patients (167 females, 175 males), aged between 20 and 25 years (mean: 22.2, SD: 1.8) participated in the study. Clinical and radiographic examinations were performed. Eruption status, mucosal and bony coverage type, presence of pain, pericoronitis, suppuration, ulceration, caries in third molar, distal caries in second molar, bone loss, root resorption, or cyst or tumor formation was investigated in addition to the position and the angulation of each tooth. Patients having at least one completely or partially erupted mandibular third molar were classified as group 1 and patients having bilateral impacted mandibular third molars were classified as group 2.
No significant difference was found between the symptoms and pathologies related with the mandibular right third molar (RM) and the left third molar (LM) among both groups and genders (P > .05). In the total sample, no significant difference was found between the RM and the LM in terms of mucosal coverage type, bony coverage type, and position both in group 1 and group 2 (P > .05); but gender had an influence on the bony coverage type and ramus distance of the RM and the LM in group 2 (P < .05). In the total the sample, symmetry was present for horizontal or distoangular and vertical or distoangular angulations in group 1 and group 2, respectively. Gender was found to also have an impact on angulation symmetry.
In most cases, a similarity was present between the symptoms and pathologies related with the bilateral mandibular third molars; but symmetry in position and angulation differed according to eruption status, angulation type, and gender.
本研究的目的是评估并确定一组年轻成年患者双侧下颌第三磨牙的相关症状、病理、位置和牙倾斜类型之间是否存在相似性。
共有342名患者（167名女性，175名男性）参与了本研究，年龄在20至25岁之间（平均：22.2岁，标准差：1.8岁）。进行了临床和影像学检查。除了每颗牙齿的位置和倾斜度外，还调查了萌出状态、黏膜和骨覆盖类型、疼痛、冠周炎、化脓、溃疡、第三磨牙龋坏、第二磨牙远中龋坏、骨质丧失、牙根吸收或囊肿或肿瘤形成情况。至少有一颗完全或部分萌出的下颌第三磨牙的患者被分类为第1组，双侧下颌第三磨牙阻生的患者被分类为第2组。
在两组和不同性别中，与下颌右侧第三磨牙（RM）和左侧第三磨牙（LM）相关的症状和病理之间均未发现显著差异（P > 0.05）。在整个样本中，第1组和第2组的RM和LM在黏膜覆盖类型、骨覆盖类型和位置方面均未发现显著差异（P > 0.05）；但性别对第2组的RM和LM的骨覆盖类型和升支距离有影响（P < 0.05）。在整个样本中，第1组水平或远中倾斜以及第2组垂直或远中倾斜在倾斜度方面分别存在对称性。还发现性别对倾斜度对称性也有影响。
在大多数情况下，双侧下颌第三磨牙相关的症状和病理之间存在相似性；但位置和倾斜度的对称性根据萌出状态、倾斜度类型和性别而有所不同。
