不稳定型寰椎骨折的治疗是脊柱外科的难题之一，治疗方式与疗效目前仍存在 争议。C1-2 固定融合或颈枕融合治疗不稳定型寰椎骨折，可重建枕-寰-枢椎复合体的稳定性，但却丧失了50%的运动功能。近来部分学者报道寰椎单节段横向加压固定治疗不稳定型寰椎骨折，既能使骨折复位、固定，又能保留枕-寰-枢椎复合体的运动功能。然而，上述研究仅限于个案或小宗病例报道，所采用内固定材料均为普通颈椎连接横棒，缺乏横向加压作用且在生物力学方面也存在不足，难以满足枕-寰-枢椎复合体的特殊生物力学要求。因此有必要设计一套更合理的寰椎横向加压单节段内固定装置，并在新鲜尸体上进行生物力学验证和机械力学测试，为临床治疗不稳定型寰椎骨折提供一种新的思路和方法。

Management of the unstable atlas fractures is challenging because of the atlantoaxial instability, and no consensus on therapy has been achieved. Fusion of C1-2 or occiput-to-C2 has been increasingly popular for treatment for unstable atlas fractures, but 50% normal motion, such as C1-2 rotation and C0-1 flexion/extension, is losed. Hence, crosslink compression and single level fusion of C1 has been suggested as a useful treatment choice for unstable atlas fractures in several studies. However, these studies has limitations including small sample size, lack of favorable fixation. The objective of our study is to found a crosslink compression system including treating of unstable atlas fractures and preserving the function of occipito-atlanto-axial complex. Furthermore, we perform a biomechanical analysis of the novel system for the treatment of unstable atlas fractures.