Radiographic evaluation of trapeziometacarpal total joint arthroplasty: Why and how?

Total joint arthroplasty is a promising surgical treatment for painful thumb trapeziometacarpal osteoarthritis. Strict surgical technique is essential to achieve a reliably good outcome. Preoperative radiographic evaluation before surgery and intraoperative fluoroscopy during surgery are valuable means of optimizing implant positioning.

Headless screw fixation of unstable ulnar styloid base fractures after distal radial fractures fixation.

Ulnar styloid fractures occur frequently concomitant with distal radial fractures. Although unstable distal radial fractures are mostly surgically treated, ulnar styloid fractures are often ignored. Unstable fractures at the base of the ulnar styloid may lead to persistent ulnar pain, due to distal radioulnar joint instability or ulnar styloid non-union.

Analysis of trapeziometacarpal prosthesis cup position with respect to the trapezial anatomy.

The purpose of this study was to analyse the anatomy of the trapezium with regard to cup position in trapeziometacarpal replacement and identify those trapeziums that are at risk of cup perforation through the trapezoid articular surface. The width of the proximal and distal articular surface and the height of the trapezium and second metacarpal facet were measured on 96 peritrapezial views reconstructed from computed tomography scans. The trapezoid articular surface of the trapezium (TRAST) angle was calculated, and four different cup designs were virtually positioned centrally in the trapezium and parallel to the proximal articular surface.

Arthroscopic Volar Extrinsic Plicature of the Volar Extrinsic Ligaments for Chronic Volar Scapholunate Instability.

The scapholunate ligamentous complex consists of the scapholunate interosseous ligament and the surrounding extrinsic ligamentous system. In cases of chronic scapholunate instability, stabilizing the extrinsic ligaments is crucial. This article presents an arthroscopic capsuloligamentous reinforcement plicature that focuses on tightening the volar scapholunate extrinsic ligaments, namely the radioscaphocapitate ligament and long radiolunate ligament, along with indirect tightening of the volar scapholunate interosseous ligament.

Arthroscopical Reinforcement of an Isolated Insufficiency of the Radioscaphocapitate Ligament to Treat Dynamic Radioscaphoid Instability: A Case Report.

The radioscaphocapitate ligament is part of the stabilizatory complex of the scaphoid. Isolated injury resulting in persistent radioscaphoid instability is rarely reported. The authors propose a technique for arthroscopic reinforcement.