Home | About JCVJS | Editorial board | Ahead of print | Current Issue | Archives | Instructions | Subscribe | Advertise | Contact us |   Login 
Journal of Craniovertebral Junction and Spine
Search Articles   
Advanced search   
Year : 2016  |  Volume : 7  |  Issue : 3  |  Page : 171-175

Comparison of hinged and contoured rods for occipitocervical arthrodesis in adults: A clinical study

1 Department of Neurological Surgery, The University of Iowa, Carver School of Medicine, Iowa City, IA 52242, USA
2 Department of Neurological Surgery, Northwestern University, Feinberg School of Medicine, Chicago, IL 60611, USA

Correspondence Address:
Nader S Dahdaleh
Department of Neurological Surgery, Northwestern University, Feinberg School of Medicine, 676 N. St. Clair Street, Suite 2210, Chicago, IL 60611
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0974-8237.188415

Rights and Permissions

Introduction: A rigid construct that employs an occipital plate and upper cervical screws and rods is the current standard treatment for craniovertebral junction (CVJ) instability. A rod is contoured to accommodate the occipitocervical angle. Fatigue failure has been associated these acute bends. Hinged rod systems have been developed to obviate intraoperative rod contouring. Object: The aim of this study is to determine the safety and efficacy of the hinged rod system in occipitocervical fusion. Materials and Methods: This study retrospectively evaluated 39 patients who underwent occipitocervical arthrodesis. Twenty patients were treated with hinged rods versus 19 with contoured rods. Clinical and radiographic data were compared and analyzed. Results: Preoperative and postoperative Nurick and Frankel scores were similar between both groups. The use of allograft, autograft or bone morphogenetic protein was similar in both groups. The average number of levels fused was 4.1 (±2.4) and 3.4 (±2) for hinged and contoured rods, respectively. The operative time, estimated blood loss, and length of stay were similar between both groups. The occiput to C2 angle was similarly maintained in both groups and all patients demonstrated no movement across the CVJ on flexion-extension X-rays during their last follow-up. The average follow-up for the hinged and contoured rod groups was 12.2 months and 15.9 months, respectively. Conclusion: Hinged rods provide a safe and effective alternative to contoured rods during occipitocervical arthrodesis.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded80    
    Comments [Add]    

Recommend this journal