19 Harley St, London, W1G 9QJ, UK

Pedicle morphology using computed tomography-based navigation system in adolescent idiopathic scoliosis

STUDY DESIGN/SETTING: Retrospective study. OBJECTIVE: The purpose of this study was to use multidimensional analysis with a computed tomography (CT)-based navigation system to measure the outer cortical diameter and the maximum screw trajectory length of the pedicle of the thoracic and lumbar regions of the spine in adolescent idiopathic scoliosis (AIS) patients. Another objective was to identify pedicles that require cautious insertion of screws. SUMMARY OF BACKGROUND DATA: Pedicle diameter in AIS patients was narrower on the concave side of the scoliotic curve. Many researchers have measured pedicle diameter and length of AIS patients by using standard CT or magnetic resonance imaging (MRI), but only few have used 3-dimensional imaging, especially CT-based navigation. METHODS: Fifteen patients with right-side thoracic AIS who underwent pedicle screw fixation were studied. A CT-based navigation system was used to measure the pedicle diameter, defined as the widest outer cortical diameter at the narrowest part of the pedicle. Moreover, the maximum pedicle screw trajectory length was measured as the distance between the posterior cortical entry point of the pedicle screw and the anterior vertebral cortex in line with the axis of the pedicle between T1 and L5. In addition, the values of each parameter taken using the CT navigation system and the standard axial CT were compared. RESULTS: Pedicles on the concave side of the main thoracic curve apex and proximal thoracic curve tended to have the narrowest diameters. The mean length of the longest screw that could be fixed was longer on the right side, except for T8 and T9. Our data showed screw size feasibility as follows: 25 or 30 mm screws were feasible from T1 to T5; 30 or 35 mm screws, from T6 to T12; and 35 or 40 mm screws, from L1 to L5. Pedicle diameter measured by the CT navigation system was larger than that measured by standard axial CT. Left-side pedicle length measured by the CT navigation system was lesser than that measured by standard axial CT. CONCLUSIONS: Pedicle diameter in patients with AIS is narrower on the concave side of the scoliotic curve, and therefore, caution should be exercised during screw insertion on the concave side

Keywords : Adolescent,analysis,Bone Screws,Child,diagnostic imaging,Female,Humans,instrumentation,Japan,Magnetic Resonance Imaging,Male,methods,Patients,Retrospective Studies,Scoliosis,Spinal Fusion,Spine,surgery,Surgery,Computer-Assisted,Tomography,X-Ray Computed,Treatment Outcome,Universities,, Morphology,Using,Computed,Tomographybased,Navigation, jaw joint pain

Date of Publication : 2013 Feb

Authors : Kuraishi S;Takahashi J;Hirabayashi H;Hashidate H;Ogihara N;Mukaiyama K;Kato H;

Organisation : Department of Orthopaedic Surgery, Shinshu University, School of Medicine, Asahi, Matsumoto City, Nagano, Japan

Journal of Publication : J Spinal Disord Tech

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/21959835

The London Spine Unit : Harley Street UK. Specialists in Cutting Edge Technologies for Spinal Surgery

Make an Appointment 

Trustpilot Reviews
Doctify Reviews
Top Doctor Reviews

Pedicle Morphology Using Computed Tomography-based Navigation System in Adolescent Idiopathic Scoliosis | Botox injections into shoulder

What our patients say ...

Consultant Spine Surgeon
Consultant Spine Surgeon
Consultant Spine Surgeon

This surgical technique consists of a percutaneous approach for the treatment of small to medium size hernias of the intervertebral disc by laser energy. The main objective is to reduce the intradiscal pressure in the nucleus pulposus

Laser Disc Surgery can be performed under local anaesthetic as a day case at our centre on the prestigious Harley Street.
What is London spine unit and How it Works

The London Spine Unit was established in 2005 and has successfully treated over 5000 patients. All conditions are treated.

treatment of all spinal disorders

The London Spine Unit specialises in Minimally Invasive Treatments allowing rapid recovery and return to normal function

Trusted by patients worldwide

The London Spine Unit provides the highest quality care to all patients and has VIP services for those seeking exceptional services

If you have any emergency Doctor’s need, simply call our 24 hour emergency

Your personal case manager will ensure that you receive the best possible care.

Call Now 

+44 844 589 2020
+44 203 973 8810