Anterior Interbody Fusion of the Cervical Spine With Zero-P Spacer Prospective Comparative Study-Clinical and Radiological Results at a Minimum 2 Years after Surgery

作者：Vanek Petr^*; Bradac Ondrej; DeLacy Patricia; Lacman Jiri; Benes Vladimir

来源：Spine, 2013, 38(13): E792-E797.

DOI：10.1097/BRS.0b013e3182913400

• cervical spine
• degenerative disc disease
• dynamic plate
• Zero-P
• technique

Study Design. A prospective study. %26lt;br%26gt;Objective. The aim of this study was to compare clinical and radiological efficacy of anterior cervical microdiscectomy and fusion done by the newly designed low-profile interbody spacer in cases of symptomatic cervical spine spondylosis. %26lt;br%26gt;Summary of Background Data. There are basically 2 ways to provide interbody fusion in the degenerative cervical spine; the first is by way of an unanchored %26quot;stand-alone%26quot; bone graft or cage, and the second is with bone graft or a cage anchored with a plate. Both concepts have their own benefits as well as potential drawbacks. Low-profile angle-stable spacer Zero-P is an implant that can potentially limit the drawbacks of both these procedures. %26lt;br%26gt;Methods. Prospective study collecting clinical and radiological data of 77 patients undergoing anterior cervical interbody fusion of 1 or 2 motion segments from C3-C7 was performed. Zero-P spacer was used in 44 patients (55 segments) and in 33 cases (41 segments), stabilization was done using interbody spacer and dynamic anterior cervical plate. Patients were followed a minimum of 2 years after surgery. %26lt;br%26gt;Results. There was no significant difference in neck disability index values, presence of dysphagia (P = 0.308), and Cobb C values during follow-up (P = 0.051) between both groups. A significant difference in the first 2 values of Cobb S was found (P %26lt; 0.001), but the next course of Cobb S changes showed no difference in either group. No difference was found in the radiological stability during follow-up, and no revision surgery was done. %26lt;br%26gt;Conclusion. The results of this study confirm biomechanical assumptions associated with the Zero-P spacer. Implantation of this new cage results in setting required biomechanical conditions in the treated segment that are comparable with those when the segment is treated with a dynamic plate. However, the potential of the mentioned implant to reduce the incidence of postoperative dysphagia was not proven on this sample of patients.

• 出版日期2013-6-1