Division of Anatomy, Faculty of Dental Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
"Carol Davila" Central Military Emergency University Hospital, Bucharest, Romania.
Folia Morphol (Warsz). 2023;82(2):424-428. doi: 10.5603/FM.a2022.0012. Epub 2022 Feb 3.
The lingual surface of the mandible's body is commonly indicated as presenting the submandibular and sublingual fossae, which are separated by the mylohyoid line. The mylohyoid line attaches to the mylohyoid muscle (MM). Less attention has been paid to the 'mylohyoid boutonnières', which allow the 'sublingual buttons' to pass through the mylohyoid muscle in the submandibular space. The cone-beam computed tomography files of patients were routinely examined for anatomical studies. Two cases were found with unexpected morphologies of the mandible's body - the mylohyoid lines were incomplete anteriorly, and herniated sublingual tissue determined an additional fossa inferior to that line in the premolar region. That fossa was termed the 'accessory submandibular fossa'. It determined on coronal slices a 'sand watch' contour of the mandible's body. With such a peculiar morphology, the mandible is more prone to fracture. Moreover, when inserting endosseous implants, the procedure should be carefully personalised in such rare cases.
下颌体的舌侧表面通常表现为颏下窝和舌下窝，它们由下颌舌骨线分隔。下颌舌骨线附着于下颌舌骨肌（MM）。人们对“下颌舌骨纽扣状凹陷”关注较少，它允许“舌下纽扣”穿过下颌下空间的下颌舌骨肌。对患者的锥形束 CT 文件进行了常规检查以进行解剖学研究。发现了两例下颌体异常形态的病例——下颌舌骨线前部不完整，而突出的舌下组织在该线以下的前磨牙区域确定了一个额外的窝。该窝被称为“辅助颏下窝”。它在冠状片上确定了下颌体的“沙钟”轮廓。有了这样一种特殊的形态，下颌骨更容易骨折。此外，在植入骨内种植体时，在这种罕见情况下，应仔细个性化手术过程。
