• Qunfeng Guo, Mei Zhang, Liang Wang, Xuhua Lu, Xiang Guo, and Bin Ni.
• *Department of Orthopedics, Changzheng Hospital, The Second Military Medical University, Shanghai, People's Republic of China †Department of Traditional Chinese Medicine Rehabilitation, Zhabei Central Hospital, Shanghai, People's Republic of China.
• Spine. 2016 Jun 1; 41 (12): E751-8.

Study DesignA retrospective comparative study.ObjectiveThe aim of this study was to compare the outcomes of anterior screw fixation and posterior temporary-fixation in the treatment of Anderson-D'Alonzo type II odontoid fractures.Summary Of Background DataPosterior C1-C2 temporary-fixation can spare the motion of C1-C2 in the treatment of odontoid fractures. However, it is unknown whether it can achieve the same outcomes as anterior screw fixation.MethodsData of 20 patients who underwent posterior temporary-fixation due to Anderson-D'Alonzo type II odontoid fractures with intact transverse ligament were retrospectively reviewed. Another 20 patients undergoing anterior screw fixation were randomly selected as the control group. The range of motion (ROM) in rotation of C1-C2 measured on functional computed tomography (CT) scan and outcomes evaluated by the visual analog scale (VAS) for neck pain, neck stiffness, patient satisfaction, and neck disability index (NDI) were compared between two groups at the final follow-up.ResultsAt the final follow-up, 19 cases in each groups achieved facture healing. Total C1-C2 ROM in rotation on both sides in the posterior temporary-fixation group was 32.4 ± 12.5°, smaller than 40.0 ± 13.0 in the anterior fixation group. However, there was no statistical difference between two groups. And there was no significant difference between two groups in functional outcomes evaluated by VAS for neck pain, neck stiffness, patient satisfaction, and NDI.ConclusionPosterior temporary-fixation can spare the motion of C1-C2 and achieve same good clinical outcomes as anterior screw fixation in the treatment of Anderson-D'Alonzo type II odontoid fractures. It was an ideal alternative strategy to anterior screw fixation.Level Of Evidence3.

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