Related Experiment Video
Updated: Jul 9, 2026
07:24
Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
Published on: August 22, 2025
Occipitocervical contoured rod stabilization: does it still have a role amidst the modern stabilization techniques?
Samir K Kalra1, Vijendra K Jain, Awadesh K Jaiswal
1Department of Neurosurgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, India.
Neurology India
|November 28, 2007
Summary
Contoured rod (CR) posterior fusion effectively stabilizes craniovertebral junction pathologies, particularly congenital atlantoaxial dislocation with Chiari 1 malformation. This technique offers significant bony fusion and stability, improving patient outcomes.
Area of Science:
- Neurosurgery
- Orthopedic Surgery
- Spinal Surgery
Background:
- The occipitocervical contoured rod (CR) technique is an effective and economical method for posterior fusion (PF) in craniovertebral junction (CVJ) pathologies.
- This study evaluates the indications, outcomes, and effectiveness of CR stabilization for various CVJ conditions.
Purpose of the Study:
- To discuss the various indications for contoured rod (CR) stabilization in craniovertebral junction (CVJ) pathologies.
- To analyze the outcomes of CR posterior fusion in a cohort of patients with diverse CVJ conditions.
Main Methods:
- Retrospective analysis of 54 patients who underwent CR stabilization for CVJ pathologies.
- Patients included those with congenital atlantoaxial dislocation (AAD), CVJ tuberculosis, rheumatoid arthritis, and C2-3 listhesis.
- Indications for CR fusion in congenital AAD included Chiari 1 malformation, occipitalized C1 arch, and hypermobile or rotatory AAD. CR was also used as a revision procedure.
Main Results:
- At a mean follow-up of 17.78 months, 24 patients improved, 18 stabilized, and six deteriorated.
- In 37 patients with at least three months of follow-up, 31 achieved bony fusion or a stable construct.
- CR was utilized as a revision procedure in seven patients.
Conclusions:
- Contoured rod (CR) posterior fusion is particularly beneficial for congenital atlantoaxial dislocation (AAD) with coexisting Chiari 1 malformation, cervical scoliosis, sub-axial instability, or asymmetrical facet joints.
- For acquired pathologies with three-column instability, CR enhances stability by including adjacent joints in the fusion.
- The CR technique provides effective stabilization and bony union for a range of complex CVJ pathologies.
