Abstract
Range of motion and stability are important outcome parameters to assess function
of the distal radioulnar joint (DRUJ), in particular pronation, supination, and weight-lifting
capacity. The DRUJ semiconstrained implant developed by Scheker et al is intended
to reproduce all the functions of the triangular fibrocartilage complex and the DRUJ.
The aim of the study was to investigate the subjective, clinical, and radiographic
results in 10 patients after primary implantation of the semiconstrained DRUJ arthroplasty
following DRUJ derangement and painful instability, with an average follow-up of 3
years with a special focus on the complications. Standardized preoperative and postoperative
evaluation included assessment of pain by a visual analog scale, radiographic examination,
range of motion measurements, lifting capacity, and grip strength. The patient-perceived
function was investigated using clinical score charts. Compared with the preoperative
status, range of motion showed little change, while grip strength, lifting capacity,
pain score, and patient-perceived functions improved significantly.
One patient developed an ulna stem loosening, while two patients had to be reoperated
because of an irritation of the extensor tendons and the superficial radial nerve
at the first dorsal compartment of the wrist. In this study, arthroplasty of the DRUJ
using the semiconstrained DRUJ arthroplasty was found to result in satisfactory outcome.
Level of evidence: Level IV
Keywords
distal radioulnar joint - semiconstrained implant - arthroplasty
