What is it:
Deformity of the finger characterised by hyperextension of the middle finger joint and flexion of the fingertip.
Initially caused by damage to the attachment of the finger extensor tendon which may be due to a traumatic laceration, avulsion fracture from a direct blow to the fingertip while finger is straight or due to weakening of the tendon caused by inflammatory disease e.g. rheumatoid arthritis.
- Swelling and stiffness of finger joints
- A difficulty in flexion at the middle finger joint
- A snapping sensation may also occur during flexion.
- A custom thermoplastic extension block splints to correct hyperextension at the middle finger joint.
- A progressive thermoplastic extension splint can help improve the fingertip flexion deformity.
- Passive stretching.
May be indicated for severe or long-standing deformities as these will not likely achieve true correction without surgery.
Some degree of deformity or limitations in range of motion are common.