Clinical Study Union Rate on Hinge Side after Open-Door Laminoplasty Using

Abstract

Copyright © 2013 Koopong Siribumrungwong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Background. One of the important complications of open-door laminoplasty is a premature laminoplasty closure. In order to prevent premature laminoplasty closure many techniques have been described and a titanium miniplate is one of the instruments to maintain cervical canal expansion. This study was performed to evaluate the effectiveness of titanium miniplates on the union rate for open-door laminoplasty. Materials and Methods. We performed open-door laminoplasty in 68 levels of fourteen patients using maxillofacial titanium miniplates. Axial computed tomography scans were obtained at 6 months postoperatively to evaluate the union rates of the hinge side. The Japanese Orthopedic Association (JOA) score was used to compare the clinical outcomes before and after surgery.Results. Computed tomography scan data was available on 68 levels in 14 patients.There were no premature closures of the hinge orminiplate dislodgements.Theunion rate on the hinge sidewas 70.5 % (48/68).Themean JOA score increased significantly from 7.0 before surgery to 10.2, 12.2, and 13.0 after surgery at 1, 3, and 6 months, respectively. Conclusion. Open-door laminoplasty usingmaxillofacial titaniumminiplates can provide union rates comparable to other techniques. It canmaintain canal expansion without failures, dislodgements, and premature closures. 1