What is it:
Deformity of the finger characterised by hyperextension of the fingertip and flexion of the proximal interphalangeal joint.
Can be caused by the extensor tendon of the finger being severed due to trauma or tearing/weaning of the extensor tendon due to an injury or condition e.g. rheumatoid arthritis.
Most often it is due to a forceful blow to the top side of a bent middle finger joint.
- Loss of extension at the middle finger joint and hyperextension at the fingertip.
- A weak grip
- Inability to grasp and manipulate small objects with the top of the finger.
- Swelling and pain.
- The creation of a custom thermoplastic splint that will hold middle finger joint into extension full time for around 6-8 weeks. When full extension of the joint can be maintained throughout the day progress to night splinting.
- Thermoplastic splinting of the fingertip into slight flexion may be indicated.
- Exercises can be gradually incorporated after splinting to improve range of motion and strength.
May be indicated when the deformity results from rheumatoid arthritis, the tendon is severed, a large bone fragment is displaced from its normal position or the condition does not improve with splinting.