SRS Newsletter
June 2013
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3D Scoliosis Committee Update

Hubert Labelle, MD
3D Scoliosis Committee Chair

Hubert Labelle, MD

Over the past year, the 3D Scoliosis Committee continued its three main mandates of developing a 3D classification of Adolescent Idiopathic Scoliosis (AIS), of performing 3D analysis of scoliosis and its treatment, and of promoting 3D analysis of scoliosis.

Important work was started on the project supported by a grant from Orthopaedic Research and Education Foundation (OREF) ("Prospective Multi-center analysis on 3D factors involved in the decision to perform a selective vs. non-selective fusion in AIS"; 2012-15). Seven centers are involved in the study (Manhattan, Baltimore, Philadelphia, Miami, San Diego, Wilmington, and Montreal). The protocols for the 3D reconstruction process was developed and tested, Institutional Review Board (IRB) approvals were obtained, and the first cases were recruited in 2013.

As part of another grant from the Canadian Institutes of Health Research (“Towards a 3-D classification of AIS”; 2010-13), some fuzzy clustering analysis was done using 3D indices and a database of 183 cases. Other work is being done to analyze the torsion of the scoliotic spine.

A 3D viewer (Clindexia software) along with a small database of 3D reconstructed cases was made available to the members of the 3D Scoliosis Committee. This will allow members to visualize the spine in 3D.

One of the main challenges remains to see, and to integrate the information brought by adding the 3rd dimension. A more complete graphic display of the transverse plane (or ‘’top view’’) of scoliosis is under development to allow a better understanding of how the various curves as well as other body indices seen in the frontal plane are oriented in the 3D space and how correction in 3D can be achieved after surgery, such as in the example shown below. A working day is planned either during the 20th International Meeting on Advanced Spine Techniques (IMAST) or the 47th Annual Meeting & Course for the 3D committee to analyze 3D cases and define criteria to interpret the 3D parameters.

Chair: Hubert Labelle, MD Committee Members: Carl Eric Aubin, PhD, P.Eng; Lawrence G. Lenke, MD; Roger P. Jackson, MD; Peter O. Newton, MD; Stefan Parent, MD, PhD; Virginie C. Lafage, PhD