Contribution of automated scannographic measurement in the glenoid component plannification in reverse shoulder prosthesis at CHU de Dijon: According to 34 cases

Introduction: The precision in the placement of a glenoid support in reverse shoulder prosthesis is the most important factor defining the long-term evolution of the prosthesis. We put in place an automatic measure of the version and the glenoidien inclination on various incidences of a 3 dimension scannographic view. This study had as objective to evaluate the plannification realized in 34 patients in whom the protocol was applied in the CHU de Dijon.Methodology: Our study was based on 34 patients who benefitted from a reverse shoulder prosthesis indicated for shoulder arthrosis at university hospital of Dijon. We compared the orientation of the glenoid implant chosen in the course of the plannification with the aid of the software Personalfitet® with the initial position of the glenoid cavity measured on preoperative scans.Results: The average preoperative inclination angle measured on CT scan images was 6,5°, with a maximum of 27° and a minimum of 13°. The version was 11,3°, with a maximum retroversion of 31°. On the planification, the average inclination was at 8,6°, with a minimum inclination of 2° and a maximum inclination of 21,5°.Discussion: The values that we obtained from our method are similar to those described by other studies in literature.Conclusion: Thanks to preoperative plannification with the use of CT scan, the added correction to the orientation of the glenoid support can be perfectly defined.