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Related Experiment Video

Updated: Jul 21, 2025

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The semiconstrained DRUJ prosthesis: blessing or curse?

Katharina Sommer1, Ramona Sturm2, Jasmina Sterz2

  • 1Department of Trauma, Hand and Reconstructive Surgery, Goethe University Frankfurt, Theodor Stern Kai 7, 60590, Frankfurt Am Main, Germany. Katharina.Sommer@kgu.de.

European Journal of Trauma and Emergency Surgery : Official Publication of the European Trauma Society
|July 26, 2023
PubMed
Summary
This summary is machine-generated.

The Aptis-prosthesis offers a safe and effective solution for distal radioulnar joint (DRUJ) issues, showing no required revisions in 25 years. Patients experienced significant improvements in motion and grip strength with high satisfaction.

Keywords:
Aptis semi constrained prosthesisDRUJDRUJ arthrosisDRUJ instability

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Reconstructive surgery

Background:

  • Distal radioulnar joint (DRUJ) instability and arthritis present complex treatment challenges.
  • Existing surgical methods often lead to forearm destabilization and limited rotation.
  • The Aptis-prosthesis serves as a total DRUJ replacement, particularly for cases with failed prior treatments.

Purpose of the Study:

  • To evaluate the safety and efficacy of the Aptis-prosthesis for treating failed distal radioulnar joint (DRUJ) surgeries.
  • To assess clinical outcomes, including range of motion, grip strength, and pain levels.
  • To analyze complications, radiographic changes, and patient satisfaction after Aptis-prosthesis implantation.

Main Methods:

  • Retrospective analysis of 13 patients (2016-2021) who received an Aptis-prosthesis.
  • Clinical outcomes documented: range of motion (ROM), grip strength, numeric rate scaling (NRS) for pain.
  • Radiographic evaluation for osseous changes and loosening, alongside DASH-Score and patient satisfaction assessment.

Main Results:

  • No significant revisions or explantations were required for any implanted prostheses.
  • Achieved average ROM: 68.1° pronation, 72.3° supination; grip strength averaged 83% of the contralateral side.
  • Low pain scores (NRS 0 at rest, 1.2 under weight-bearing); high patient satisfaction reported, with DASH-Score averaging 31.8.

Conclusions:

  • The semiconstrained Aptis-prosthesis is a safe and effective treatment for failed distal radioulnar joint (DRUJ) surgeries.
  • Long-term follow-up demonstrates a remarkable absence of significant revisions or explantations.
  • The Aptis-prosthesis provides reliable functional restoration and patient satisfaction in complex DRUJ cases.