Pronounced: boo-ten-EER de-FORM-uh-tee of finger
Boutonnière deformity is damage to the tissue of the middle joint of the finger. It makes it hard to straighten the finger.
Tendons in the Finger
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This problem may be caused by:
Symptoms may be:
The doctor will ask about your symptoms and health history. A physical exam will be done, paying close attention to the finger. You may be asked how the injury happened.
An x-ray may be done to check for a fracture.
A splint will be needed to protect the finger as it heals. Other options are:
Medicine may be needed to ease pain and swelling. It may be given by mouth or with an injection.
Antibiotics may also be used to treat an infection.
Some people may need surgery to repair the tendon. Exercises will also be given to help with finger strength and motion.
This injury often happens due to accidents. There are no guidelines to prevent it.
National Institutes of Arthritis and Musculoskeletal and Skin Diseases
Ortho Info—American Academy of Orthopaedic Surgeons
Canadian Orthopaedic Foundation
Canadian Physiotherapy Association
Boutonniere deformity of the finger. Orthogate website. Available at:
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Published September 4, 2015. Accessed September 23, 2019.
Boutonniere deformity—emergency management. EBSCO DynaMed website. Available at: https://www.dynamed.com/management/boutonniere-deformity-emergency-management. Accessed September 23, 2019.
McMurtry JT, Isaacs J. Extensor tendons injuries. Clin Sports Med 2015. Jan;34(1):167-180.
Last reviewed September 2019 by
EBSCO Medical Review Board
Teresa Briedwell, PT, DPT, OCS, CSCS
Last Updated: 7/14/2020