10-Year experience with pressfit stemless shoulder prosthesis

Abstract

Stemless shoulder arthroplasty has the advantage of reducing stem related complications while allowing for  anatomic restoration of proximal humerus independently from the humeral canal and diaphyseal axis and preserving bone stock for future revision. 

 The aim of this study was to share 10 year experience with a pressfit stemless hemi and total shoulder arthroplasty in a series operated by two shoulder surgeons.

24 cases (21 patients) of  stemless shoulder arthroplasty were performed by the two senior authors. The press fit SIDUS stemless shoulder implant (Zimmer Biomet ) was used in all cases. Pegged cemented glenoid component was used in all cases of TSA. Mean age was 51,2 yrs and mean follow up was 48 months.

Shoulder function improved significantly after a mean follow-up of 48 months for active range of motion and the Constant score. Mean Constant score improved from 56,7 points preoperatively to 91 points at final follow up (p< 0,05).  AT final follow up, there was no loosening of the stemless humeral head component. partial medial calcar resorption and remodeling was seen in 4 cases (16,7%). Complications were registered in two cases (8,3%). No implant failure was observed at the humeral side and no revision surgery was performed at final follow up. Survivorship of stemless shoulder arthroplasty in this series at final follow up was 100%.

The use of stemless pressfit shoulder component in both HSA and TSA gains excellent functional and radiological results at mid term with low rate of complications  and excellent survivorship in a variety of indications including osteoarthritis, avascular necrosis and selected cases of fracture sequalae which makes it appropriate for both young and older patients with good metaphyseal bone stock.