Late Dislocation of Adaptive Proximal Scaphoid Implant: A Case Report

Abstract

Introduction

The adaptive proximal scaphoid implant (APSI) is an ovoid and unfixed partial scaphoid prosthesis used to replace the proximal pole of the scaphoid to prevent scaphoid nonunion, advanced collapse wrist, or scapholunate advanced collapse wrist, two challenging pathologies for hand surgeons.

Case Report

We described a case of a late dislocation of APSI after a high-energy trauma after 17 years the hemiarthroplasty, which we treated with a new APSI replacement and double-layer capsuloplasty.

Discussion

Dislocation is the most common complication in this type of prosthesis, which occurs most of the time within 3months, as an early complication. We reviewed the literature discussing the problem of dislocation in this type of surgery.

Conclusion

Numerous strategies have been suggested for these pathologies, but the APSI is a valid alternative in young patients who need a rapid recovery, and it is an alternative to more invasive surgery.

Keywords

APSI - dislocation - scaphoid implant - SNAC - SLAC

Ethical Approval

The guidelines of the Declaration of Helsinki were followed.

Publication History

Received: 22 August 2025

Accepted: 04 January 2026

Article published online:
14 January 2026

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