II. Mechanism
- IP joint lateral deviation (radial or ulnar)
- Occurs under forced deviation
- Most commonly occurs at PIP joint
III. Signs
- Localized tenderness at affected collateral ligament
- Assess ligament stability
- Position affected finger
- MCP joint held at 90 degrees flexion
- PIP joint held at 30 degrees flexion
- Apply lateral stress to joint to test laxity
- Apply varus strees
- Apply valgus stress
- Position affected finger
IV. Imaging: XRay
- Avulsion at ligament insertion
V. Management
- Referral Indications
- Unstable joint
- Large avulsion Fracture
- Children (due to Growth Plate injury)
- Buddy Taping to adjacent finger for 2-4 weeks
- Buddy tape ring to pinky finger or
- Buddy tape middle to index finger