Stabilization of the Distal Radioulnar Joint Using the TightRope Implant: A Distal Oblique Bundle Augmentation

Area of Science:

• Orthopedic Surgery
• Wrist Biomechanics
• Sports Medicine

Background:

• Triangular fibrocartilage complex (TFCC) injuries frequently cause distal radioulnar joint (DRUJ) instability.
• The presence of a distal oblique bundle (DOB) can influence DRUJ stability despite TFCC rupture.
• Augmenting the DOB is hypothesized to enhance stability following TFCC reinsertion.

Purpose of the Study:

• To evaluate the clinical outcomes of a novel surgical technique using the TightRope system for DOB augmentation.
• To assess the efficacy of DOB augmentation in restoring DRUJ stability after TFCC injury.
• To determine the impact of this technique on patient-reported outcomes and wrist function.

Main Methods:

• A retrospective study analyzed 21 patients undergoing TightRope augmentation of the DOB.
• The surgical technique involved drilling a tunnel for the TightRope implant along the DOB path.
• Patient-rated wrist evaluation (PRWE) scores were the primary outcome measure at least 12 months post-surgery.

Main Results:

• All patients achieved postoperative DRUJ stability.
• Median PRWE scores were significantly better for the injured side (16) compared to the uninjured side (0) (p < 0.001).
• Grip strength on the injured side (31 kg) was comparable to the uninjured side (38 kg) (p = 0.015), with no significant difference in pronation/supination.

Conclusions:

• TightRope augmentation of the DOB effectively restores DRUJ stability.
• The technique offers good patient-related outcomes with a low complication rate (10%).
• This surgical approach provides a viable solution for TFCC injuries with associated DRUJ instability.