Mocap RSA

Summary

Mocap RSA investigates postoperative shoulder motion after reverse shoulder arthroplasty (RSA), with the aim of quantifying range of motion during activities of daily living and better understanding the resulting glenohumeral and scapulothoracic kinematics.

A major technical challenge is the accurate reconstruction of the postoperative anatomy and prosthetic components. Metallic implants can generate substantial artifacts in conventional CT imaging, making 3D reconstruction difficult. To address this, patients were scanned postoperatively using a dedicated low-dose cone-beam CT protocol, and a registration method was developed to align preoperative 3D bone models of the scapula and humerus, together with implant CAD models, onto the postoperative images.

Artanim was responsible for the segmentation and 3D reconstruction of the preoperative and postoperative bone and implant models, as well as for the dynamic simulation of reverse shoulder prostheses driven by motion capture data. The Haute École de Santé (HEdS) was responsible for the postoperative registration methodology, while La Tour Hospital handled patient recruitment and the clinical aspects of the study.

Partners

Artanim
Motion capture, 3D reconstruction and dynamic simulation of reverse shoulder prostheses.

Haute École de Santé (HEdS)
3D registration of postoperative RSA models.

La Tour Hospital – Elbow & Shoulder Orthopedics and Traumatology
Patient recruitment, clinical testing and medical supervision.

Related Publications

Levy G, Charbonnier C, Collin P, Pernoud A, Gaillard J, Lädermann A. Exploratory analysis of shoulder motion strategies for achieving functional hand behind the back in controls and after reverse shoulder arthroplasty. A study from the LaTour group, Int Orthop, 2026.
PDF · DOI

Levy G, Charbonnier C, Martinho T, Collin P, Bothorel H, Pernoud A, Lädermann A. Reverse Shoulder Arthroplasty: How to reach the back? A motion capture study to analyse glenohumeral strategies to perform functional internal rotation after RSA and in control cases, JSES Int, 10(2):101515, 2026.
PDF · DOI

Levy G, Charbonnier C, Martinho T, Collin P, Bothorel H, Pernoud A, Lädermann A. Analysis of the glenohumeral and scapula-thoracic motions ratio in controls and after reverse shoulder arthroplasty, Swiss Med Wkly, 2025.
PDF

Levy G, Charbonnier C, Martinho T, Collin P, Bothorel H, Pernoud A, Lädermann A. Reverse Shoulder Arthroplasty: How to reach the back? A motion capture study to analyse glenohumeral strategies to perform functional internal rotation after RSA and in control cases, 35th Annual Congress of the European Shoulder and Elbow Society (SECEC), Rotterdam, The Netherlands, September, 2025.
PDF