Cirpan Sibel, Sayhan Salih, Yonguc Goksin Nilufer, Eyuboglu Canan, Karabay Nuri, Guvencer Mustafa, Naderi Sait
Dokuz Eylul University, School of Medicine, Department of Anatomy, Izmir, Turkey.
Turk Neurosurg. 2019;29(2):222-228. doi: 10.5137/1019-5149.JTN.23499-18.1.
To evaluate anatomical data of the bony structures during exploration of the C1-C2 complex.
This study included six formalin-fixed cadaveric head and neck specimens. Radiological images and anatomical measurements included: C1-C2 distance, bony distance between C1 anterior tubercle-nares and superior incisors, height of C1 anterior arch, and height and width of odontoid articular surface.
The mean distance between C1 anterior tubercle-nares and superior incisors on maxilla were 96.16 ± 8.07 mm and 84.14 ± 9.16 mm, respectively. The mean height of C1 anterior arch was 13.89 mm. The meandistance between medial borders of right-left C1 lateral masses was 19.10 ± 1.80 mm. The mean distance between medial border of lateral midline on mass right and left sides were 9.43 ± 0.88 mm and 9.68 ± 0.97 mm, respectively. The mean height of C1 anterior arch at midline was 13.89 ± 2.48 mm, and the mean distance between ventral surface of anterior arch and ventral joint of odontoid at midline was 6.43 ± 1.29 mm. The anteroposterior, horizontal diameters of odontoid on its base were 12.12 ± 0.38 mm, and 11.12 ± 0.94 mm, respectively. The angles of transoral and transnasal approaches to C1 were 32.67 ± 4.59° and 32.00 ± 2.10°, respectively.
A safe transoral or transnasal odontoidectomy requires accurate measurements and imaging regarding ventral C1-C2 relationships, distances of odontoid, lateral mass and midline.
评估C1-C2复合体探查过程中骨结构的解剖学数据。
本研究包括6个用福尔马林固定的尸体头颈部标本。放射学图像及解剖学测量包括：C1-C2距离、C1前结节-鼻孔与上颌中切牙之间的骨距离、C1前弓高度以及齿突关节面的高度和宽度。
C1前结节-鼻孔与上颌中切牙之间的平均距离分别为96.16±8.07mm和84.14±9.16mm。C1前弓的平均高度为13.89mm。左右C1侧块内侧缘之间的平均距离为19.10±1.80mm。左右侧块外侧中线内侧缘之间的平均距离分别为9.43±0.88mm和9.68±0.97mm。中线处C1前弓的平均高度为13.89±2.48mm，中线处前弓腹侧面与齿突腹侧关节之间的平均距离为6.43±1.29mm。齿突基部的前后径和横径分别为12.12±0.38mm和11.12±0.94mm。经口和经鼻入路至C1的角度分别为32.67±4.59°和32.00±2.10°。
安全的经口或经鼻齿突切除术需要准确测量并成像C1-C2腹侧关系、齿突、侧块和中线的距离。
