B Couteau1, P Mansat, R Darmana, M Mansat, J Egan. 1. INSERM U518 - Laboratoire de Biomécanique, Hôpital Purpan BP 3103, 31026 Cedex 3, Toulouse, France. beatrice.couteau@purpan.inserm.fr
Abstract
OBJECTIVE: To provide a morphological and mechanical analysis of the glenoid by 3D geometric reconstruction using computed tomography. DESIGN: For patients with different pathologies (Group A=control group, Group B=primary osteoarthritis, Group C=rheumatoid arthritis), the variation in shape of the scapula was characterized by measuring the glenoid version (beta). METHODS: Mapping the computed tomography number and its 3D variation in the bone as a finite element structure. RESULTS: In Group A, the mean value of version was 17 degrees (range 12-22 degrees ). In Groups B and C the mean value of version were 27 degrees (range 4-48 degrees ) and 31 degrees (range 25-31 degrees ) of retroversion. At the center of the glenoid there was a homogeneous area of bony tissue with low computed tomography values and the subchondral bone could be clearly identified. For Group B patients, the computed tomography values were increased at the posterior margin of the glenoid, with a thickening of the posterior area acting as a strengthening column. For the Group C patients, the anatomical modifications were not reproducible between two cases examined. CONCLUSION: Results reveal a great difference between a healthy and a pathological glenoid. RelevanceThe method will be the basis for future study of the pathological characteristics of the joint. Results should provide a new pre-operative insight to help guide the surgeon.
OBJECTIVE: To provide a morphological and mechanical analysis of the glenoid by 3D geometric reconstruction using computed tomography. DESIGN: For patients with different pathologies (Group A=control group, Group B=primary osteoarthritis, Group C=rheumatoid arthritis), the variation in shape of the scapula was characterized by measuring the glenoid version (beta). METHODS: Mapping the computed tomography number and its 3D variation in the bone as a finite element structure. RESULTS: In Group A, the mean value of version was 17 degrees (range 12-22 degrees ). In Groups B and C the mean value of version were 27 degrees (range 4-48 degrees ) and 31 degrees (range 25-31 degrees ) of retroversion. At the center of the glenoid there was a homogeneous area of bony tissue with low computed tomography values and the subchondral bone could be clearly identified. For Group B patients, the computed tomography values were increased at the posterior margin of the glenoid, with a thickening of the posterior area acting as a strengthening column. For the Group C patients, the anatomical modifications were not reproducible between two cases examined. CONCLUSION: Results reveal a great difference between a healthy and a pathological glenoid. RelevanceThe method will be the basis for future study of the pathological characteristics of the joint. Results should provide a new pre-operative insight to help guide the surgeon.
Authors: Tom R G M Verstraeten; Ellen Deschepper; Matthijs Jacxsens; Stig Walravens; Brecht De Coninck; Nicole Pouliart; Lieven F De Wilde Journal: Skeletal Radiol Date: 2013-01-31 Impact factor: 2.199
Authors: Anna Maria Kubicka; Jakub Stefaniak; Przemysław Lubiatowski; Jan Długosz; Marcin Dzianach; Marcin Redman; Janusz Piontek; Leszek Romanowski Journal: Int Orthop Date: 2016-08-05 Impact factor: 3.075
Authors: Matthew G Ditzler; J Herman Kan; Maddy Artunduaga; Siddharth P Jadhav; Bryce R Bell; Wei Zhang; Robert C Orth Journal: Pediatr Radiol Date: 2018-07-05