BACKGROUND: Anterior spinal surgery has a predominant role in the treatment of traumatic lesions of the subaxial cervical spine. Plating is considered indispensable to achieve stability but may cause dysphagia, dysphonia, and adjacent-level ossification. Zero-P (Synthes GmbH, Oberdorf, Switzerland), an anchored interdisc spacer, can be used without an associated plate. The present study aimed to test if this new implant would be associated with a low rate of dysphagia and other short-term complications compared with the standard for anterior spinal fusion surgery and would be able to achieve a solid fusion and maintain correct metamere alignment. MATERIAL AND METHODS: This is a preliminary presentation of a clinical case series of patients with subaxial cervical injuries who underwent anterior interbody fusion. From July 2009 until September 2011, 12 patients were treated with a Zero-P cage. The data for analysis included operating time compared with the standard for spinal fusion surgery with a cage plus plate construct, intraoperative blood loss, clinical and radiographic results, and complications. RESULTS: In the postoperative period no patient had neurologic worsening. One patient experienced transient dysphonia and moderate dysphagia. All the patients were followed up for a minimum of 6 months (mean: 13 months; range: 6-27 months). Stability and fusion were obtained in all patients together with correct metamere alignment. CONCLUSION: We presented the preliminary results of a clinical case series. Our results support the initiation of prospective randomized trials with more patients and longer follow-up. Georg Thieme Verlag KG Stuttgart · New York.
BACKGROUND: Anterior spinal surgery has a predominant role in the treatment of traumatic lesions of the subaxial cervical spine. Plating is considered indispensable to achieve stability but may cause dysphagia, dysphonia, and adjacent-level ossification. Zero-P (Synthes GmbH, Oberdorf, Switzerland), an anchored interdisc spacer, can be used without an associated plate. The present study aimed to test if this new implant would be associated with a low rate of dysphagia and other short-term complications compared with the standard for anterior spinal fusion surgery and would be able to achieve a solid fusion and maintain correct metamere alignment. MATERIAL AND METHODS: This is a preliminary presentation of a clinical case series of patients with subaxial cervical injuries who underwent anterior interbody fusion. From July 2009 until September 2011, 12 patients were treated with a Zero-P cage. The data for analysis included operating time compared with the standard for spinal fusion surgery with a cage plus plate construct, intraoperative blood loss, clinical and radiographic results, and complications. RESULTS: In the postoperative period no patient had neurologic worsening. One patient experienced transient dysphonia and moderate dysphagia. All the patients were followed up for a minimum of 6 months (mean: 13 months; range: 6-27 months). Stability and fusion were obtained in all patients together with correct metamere alignment. CONCLUSION: We presented the preliminary results of a clinical case series. Our results support the initiation of prospective randomized trials with more patients and longer follow-up. Georg Thieme Verlag KG Stuttgart · New York.