Optimizing the Orientation of a Suture Button to Stabilize the Distal Radioulnar Joint in a Sawbones Model

Area of Science:

• Orthopedic surgery
• Biomechanics
• Surgical innovation

Background:

• Distal radioulnar joint (DRUJ) instability causes persistent wrist pain and functional deficits.
• Current treatments for DRUJ instability are complex and yield variable results.
• Novel stabilization techniques are needed for DRUJ instability.

Purpose of the Study:

• To evaluate the efficacy of a suture button device for stabilizing the distal radioulnar joint (DRUJ) using a synthetic bone model.
• To determine the optimal configuration of a suture button for DRUJ stabilization.
• To assess the impact of different suture button placements on joint stability and range of motion.

Main Methods:

• A synthetic bone model simulating DRUJ instability was used.
• Suture buttons were inserted in straight and oblique configurations with the forearm in pronation, neutral, and supination (6 configurations).
• Measurements included range of motion, dislocation events, translation, and joint gaps.

Main Results:

• All configurations except one maintained full range of motion.
• Oblique suture button placement resulted in more dislocations than straight placement.
• Straight across configurations in neutral and 60° supination provided the greatest stability, with supination offering a slight advantage.

Conclusions:

• Suture buttons can restore DRUJ stability and maintain full range of motion in a synthetic model.
• The straight across 60° supinated configuration appears optimal for suture button placement.
• Suture buttons represent a promising new treatment option for DRUJ stabilization.