Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, Campinas University, São Paulo, Brazil.
Clin Anat. 2012 Jul;25(5):650-5. doi: 10.1002/ca.21300. Epub 2012 Jan 3.
Bifid mandibular condyle (BMC) is a rare asymptomatic morphological alteration with no predilection for age group or gender. Its morphology varies from a shallow groove to two condylar heads with separate necks, oriented mediolaterally or anteroposteriorly. This report describes an unusual case of anteroposterior bifid condyle in a 39-year-old female patient with the main complaint of mouth-opening limitation and a deviation of the mandible to the left side. Magnetic resonance imaging (MRI) findings revealed a bifid condyle on the left side and duplicated mandibular fossa, with the articular disc over the anterior head. The MRI images in the open-mouth position revealed minimal movement of the condyle. Despite the increased number of mediolateral bifid mandibular condyle cases described in the literature, none of previously reported cases of BMC included an anteroposterior bifid condyle case with two distinct mandibular fossa.
双侧下颌骨髁（BMC）是一种罕见的无症状形态改变，无年龄或性别偏好。其形态从浅沟到两个具有独立颈的髁突头不等，呈前后或内外向排列。本报告描述了一例 39 岁女性患者的不寻常的前后分叉髁突，主要症状为张口受限和下颌偏向左侧。磁共振成像（MRI）结果显示左侧髁突分叉，双侧下颌窝，前头部的关节盘。张口位 MRI 图像显示髁突运动幅度较小。尽管文献中描述了越来越多的双侧下颌骨髁骨分叉病例，但以前报告的 BMC 病例均无两个明显的下颌窝前后分叉病例。
