Disruption of the central slip/band that creates a flexion posture of the proximal interphalangeal joint (middle joint) with concurrent hyperextension posture of the distal interphalangeal joint (furthest joint) due to pathology at the central slip and triangular ligaments.
- Pain and deformity of the finger
- Inability to flex the DIP (tip) of finger and extend (straighten) the PIP (middle joint).
- Disruption of the central slip and triangular ligaments.
- Traumatic (laceration/cut, direct blow to tip of finger).
- Degenerative (chronic inflammation, Rheumatoid arthritis)
- Unopposed lumbricals and collateral bands pull the middle joint (PIP) into flexion and the last joint (DIP) into extension.
- Pathology creates deformity of the finger and lack of or inability to extend middle joint
- Early management with strict splinting of the PIP (middle) joint for 3-6 weeks.
- Occupation Therapy
- Indicated when non-operative treatment fails.
- Open tendon injuries and/or PIP (middle) joint injuries that result in an extension deficit of 30 degrees or greater.