Gumusok Mustafa, Toraman Alkurt Meryem, Museyibov Farid, Ucok Ozlem
Ministry of Health Topraklık Oral and Dental Health Center Turkey.
Department of Dentomaxillofacial Radiology Faculty of Dentistry Gazi University Turkey.
J Istanb Univ Fac Dent. 2016 Oct 1;50(3):32-37. doi: 10.17096/jiufd.58691. eCollection 2016.
The aim of this retrospective study is to determine the radiological features of keratocystic odontogenic tumors (KCOT) using cone-beam computed tomography (CBCT).
CBCT images of 28 patients who had histopathologically-confirmed KCOT were retrospectively reviewed from the archives of the Department of Dentomaxillofacial Radiology, Gazi University Faculty of Dentistry. The location and size of KCOT, cortical expansion, cortical perforation, relation with the impacted teeth, and the impact on the mandibular canal were evaluated.
The mean age of patients at initial diagnosis was 34.5 years. Patients with an impacted tooth were significantly younger than those without an impacted tooth (p<0.05). Among KCOTs, 21% were localized in the maxilla whereas 79% were found in the mandible. The lesions localized in the mandible were mostly found in the retromolar-ramus region. Of these patients, 93% had cortical expansion and 75% had bone perforation. Of the 22 mandibular lesions, 20 were in close proximity of the mandibular canal and 18 (90%) of these lesions had caused destruction in the mandibular canal.
KCOTs exhibit their aggressive nature in the jaw bone. CBCT is a useful radiological imaging method to examine the radiologic characteristics of KCOTs such as bone destruction and their spatial relations with the neighboring anatomic structures.
本回顾性研究旨在利用锥形束计算机断层扫描（CBCT）确定牙源性角化囊性瘤（KCOT）的放射学特征。
从加齐大学牙科学院口腔颌面放射科存档中，回顾性分析28例经组织病理学确诊为KCOT患者的CBCT图像。评估KCOT的位置、大小、皮质扩张、皮质穿孔、与阻生牙的关系以及对下颌管的影响。
患者初次诊断时的平均年龄为34.5岁。有阻生牙的患者明显比没有阻生牙的患者年轻（p<0.05）。在KCOT中，21%位于上颌骨，而79%位于下颌骨。位于下颌骨的病变大多见于磨牙后-升支区域。这些患者中，93%有皮质扩张，75%有骨穿孔。在22例下颌病变中，20例紧邻下颌管，其中18例（90%）病变导致下颌管破坏。
KCOT在颌骨中表现出侵袭性。CBCT是一种有用的放射学成像方法，可用于检查KCOT的放射学特征，如骨破坏及其与邻近解剖结构的空间关系。
