Ideal Insertion Point and Angle of Cervical Pedicular Screws in Korean (한국인에서 경추 척추경 나사못 고정시 이상적인 삽입점 및 삽입각도)

박희전; Ki Youn Kwon (권기연); 윤원식

Ideal Insertion Point and Angle of Cervical Pedicular Screws in Korean

Journal of Korean Society of Spine Surgery
Abbr : J Kor Spine Sur
2013, 20(4), pp.169-177
Publisher : Korean Society Of Spine Surgery
Research Area : Medicine and Pharmacy > Orthopedic Surgery

박희전 ¹, Ki Youn Kwon ¹, 윤원식 ¹

¹연세대학교 원주의과대학 정형외과학교실

Accredited

ABSTRACT

Study Design: A retrospective study. Objectives: Using computed tomography, it is to measure pedicle size of lower cervical spine in Koreas to find ideal insertion point and angle in fixating pedicular screws. Summary of Literature Review: Although techniques in pedicular screw fixation and pedicle’s anatomical shape in foreign populations have been well documented and studied, no anatomical study on lower cervical pedicle in Korean population has been reported. Materials and Methods: A total of 180 patients with computed tomography taken at our institution were selected for the study. Width,total length, and length of pedicle, insertion point and angle, and safe insertion angles were measured on axial view. On sagittal view,height of pedicle, insertion point and angle, and safe insertion angles were determined. Results: Mean height of study subject was 164.2cm. Mean width of pedicle was 5.5mm, mean height 7.2mm, mean total length 31.2mm,and mean length 14.8mm. Mean insertion point from 3rd to 7th cervical spines was medially 3.3mm from lateral mass and downward 4.7mm from margin of upper facet. Mean insertion angles from 3rd to 7th cervical spines were 41.6° axially and 6.4° sagittally. Calculated safe insertion angles were 8° on medial and lateral sides and 14° on superior and inferior sides. Conclusions: Using computed tomography images, ideal insertion point and angle were measured for pedicular screw insertion, but,due to individual variation, preoperative measurement of insertion point and angle on computed tomography is necessary.

KEYWORDS

Cervical spine, Pedicular screw, Insertion point, Insertion angle

Citation status

* References for papers published after 2023 are currently being built.

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Journal of Korean Society of Spine Surgery 2023 KCI Impact Factor : 0.03