A Simplified Lateral Hinge Approach to the Proximal Interphalangeal Joint

Area of Science:

• Orthopedic surgery
• Hand surgery
• Joint reconstruction

Background:

• Proximal interphalangeal (PIP) joint arthritis causes pain and functional loss.
• Current PIP joint replacement methods have high complication rates, often due to soft-tissue imbalance.
• Existing surgical approaches (volar, dorsal, lateral) yield variable outcomes.

Purpose of the Study:

• To introduce a novel, simplified lateral hinge approach for PIP joint replacement.
• To evaluate the efficacy of this approach in improving joint stability and reducing complications.
• To describe the surgical technique and rehabilitation protocol associated with this new method.

Main Methods:

• A simplified lateral hinge approach involving splitting the collateral ligament for joint exposure.
• Repair of the collateral ligament after prosthesis insertion to ensure joint stability.
• Preservation of surrounding tendons (central slip, flexor, extensor) to facilitate early motion.

Main Results:

• The described technique provides adequate joint exposure.
• Simple collateral ligament repair ensures joint stabilization.
• Preservation of key tendons allows for early active mobilization without splinting.
• Reduced risk of post-operative instability, swan-neck, and boutonniere deformities.

Conclusions:

• The simplified lateral hinge approach offers a promising alternative for PIP joint replacement.
• This technique enhances joint stability and minimizes common complications.
• Early active mobilization is feasible, potentially improving patient outcomes and recovery.