Boutonniere Deformity



Boutonniere deformity describes the bent-down (flexed) position of the middle joint of the finger. The deformity is a result of the rupture of the central tendon and it’s most common after trauma or in arthritis. It results in a stiff finger in this position if not treated.


The symptoms may appear immediately after the accident or develop a few weeks later:

  • The middle joint of the finger cannot be straightened and the fingertip cannot be bent
  • Swelling and pain

Treatment involves splinting the joint in a straight position until the injured tendon is fully healed.  Surgery may be necessary. Rehabilitation:

  • Stretching and strengthening exercises to regain the flexibility of the finger
  • Application of electrotherapeutic modalities