School of Health, Mersin University, Çiftlikköy Campus, Yenişehir, 33343, Mersin, Turkey.
Department of Anatomy, School of Medicine, Mersin University, Mersin, Turkey.
Surg Radiol Anat. 2020 Aug;42(8):969-973. doi: 10.1007/s00276-020-02456-0. Epub 2020 Mar 19.
To determine the morphological features of the denticulate ligament in fetal period.
Twelve formalin-fixed fetuses (six females and six males) with a mean gestational age of 27.0 ± 2.04 weeks (range between 25 and 32 weeks) were dissected to reveal morphological properties of the denticulate ligaments.
Denticulate ligament was observed as a continuous ligament extending throughout the length of spinal cord in all fetuses. It separated the vertebral canal into two as anterior and posterior parts and was anchored to the dura mater on either side of the spinal cord with mostly triangular processes as well as thin band-like extensions. The first denticulate ligament process was always a large and prominent fibrous band and was arising from the spinal cord surface, extending in an oblique direction upward to the anterolateral rim of foramen magnum, below and posterior to the hypoglossal canal. The last denticulate ligament process was observed either in the T11-12 (2 sides, 8%), T12-L1 (15 sides, 62%) or L1-2 (7 sides, 30%) and all were band-like processes. At certain spinal cord levels, denticulate ligament had no processes to attach duramater while in some other fetuses double denticulate ligament processes were detected within the same interval. The distance between the denticulate ligament process and the superior spinal nerve root and the distance between the denticulate ligament process and the inferior spinal nerve root were measured at each spinal level. This distance was found to be increased from upper to lower levels of the spine.
Detailed morphological data about fetal denticulate ligament presented in this study provide significant information which may be essential during several surgical interventions performed in early postnatal period and childhood focusing on the spinal cord, spinal nerve roots and meningeal structures.
确定胎儿时期齿状韧带的形态特征。
对 12 例福尔马林固定胎儿（6 名女性和 6 名男性）进行解剖，以揭示齿状韧带的形态特征。这些胎儿的平均胎龄为 27.0±2.04 周（范围在 25 周到 32 周之间）。
在所有胎儿中，齿状韧带都被观察为一条连续的韧带，贯穿脊髓全长。它将椎管分为前后两部分，并通过大多呈三角形的突起以及薄的带状延伸部锚定在脊髓两侧的硬脑膜上。第一个齿状韧带突起始终是一条大而突出的纤维带，从脊髓表面开始，呈斜向上方延伸至枕骨大孔的前外侧缘，位于舌下神经管下方和后方。最后一个齿状韧带突起见于 T11-12（2 侧，8%）、T12-L1（15 侧，62%）或 L1-2（7 侧，30%），均为带状突起。在某些脊髓水平，齿状韧带没有与硬脑膜附着的突起，而在其他一些胎儿中，同一间隔内检测到双齿状韧带突起。在每个脊髓水平测量齿状韧带突起与上脊神经根之间的距离以及齿状韧带突起与下脊神经根之间的距离。发现这个距离从脊柱的上部到下部逐渐增加。
本研究提供了详细的胎儿齿状韧带形态学数据，这些数据在出生后早期进行的涉及脊髓、脊神经根和脑膜结构的几次手术干预中可能非常重要。
