Finger Hyperextension/ Dislocation
What is it?
Hyperextension of the finger, usually at the proximal interphalangeal joint. This may be associated with subluxation (partial joint dislocation), or complete dislocation. Three stabilising structures of the interphalangeal joint are progressively injured: the volar plate; radial collateral ligament; and ulna collateral ligament.
What is the cause?
- a fall on an outstretched hand, hyperextending the fingers
- axial load on the finger eg a ball forcing the finger backwards
What are the symptoms?
- pain, particularly over the palmar side of the joint
- subluxation or dislocation will cause deformity and loss of movement
What are the treatment options?
- reduction of a dislocation can usually be achieved in the Emergency Department
- stable injuries – sometimes require a hand therapy splint
- unstable injuries – always require a hand therapy splint
- fractures – sometimes need an operation
When should I see a Surgeon?
- if the joint cannot be reduced immediately
- if there is a fracture