Abstract

Through this single-center consecutive prospective study, we evaluated the results of 2 posteriors C1/ C2 constructs procedure for Type II odontoid fractures OBAV. 5 adult patients were succefully treated by Harms's technique and a novel C1 lateral mass/C2 laminar hooks procedure in posterior approach for Type II odontoid fractures OBAV. The mean follow-up was 10 months. All patients were male. The mean age was 49.2 years. Bony fusion and clinical outcome were favorables in all cases. No neural or vascular damage related to theses techniques have been observed. Surgeons might consider theses differents approachs techniques before realizing a treatment.

Highlights

  • CSF : Cerebrospinal Fluid; CT: Computerized Tomography; InI: Intentional Injury; MRI: Magnetic Resonance Imaging; modified Rankin scale (mRS): modified Rankin Scale; MVA : Motor Vehicle Accident; OBAV: Fracture line Oblique from posterosuperior to anteroinferior; Type II odontoid fractures (TOF): Type II Odontoid Fracture

  • In 80 % of the cases, fractures occurred in a high energy trauma (Intentional Injury, Motor Vehicle Accident, fall from a height) and in 20 % were secondary to low energy trauma

  • The postoperative clinical evolution was studied according to the modified Rankin scale (Table 1)

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Summary

Introduction

25% of all cervical spine injuries affect the axis [1, 2], of wich odontoid fracture represent 10–15% [3] These fractures were classified into three distinct types by Anderson and D’Alonzo [4] in 1974. Type III fractures extend into the body of the axis, frequently involving the superior articular surface. These fractures may be caused by a flexion moment through the occiput [6]. We present five cases of Type II odontoid fractures (TOF) OBAV treated by Harm's technique [9] and a new C1 lateral mass/C2 laminar hooks procedure in posterior approach that we propose as an alternative procedure for the surgical management of TOF OBAV. The hooks were inserted in contact with the caudal border of the C2 lamina, as laterally as possible from midline, to facilitate the connection of the rods

Results
Discussion
Obav Luxcation

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