Boutonniere deformity

Usually a result of injuring an extensor tendon. This condition prevents the middle joint from straightening; at the same time, the fingertip bends back. It is important that it’s treated quickly or the finger may become more deformed, affecting its normal function. ‘Boutonniere’ comes from the shape of the tear that causes the injury to the tendon and means ‘buttonhole’ in French.


It is usually the result of the finger being hit very hard on the top of the middle joint while it’s bent, but sometimes it can be caused by a deep cut on top of the finger, separating the tendon from the bone. It can also be caused by osteoarthritis.


You may notice symptoms soon after injuring your finger, although sometimes they can develop up to three weeks later. They include pain, swelling, not being able to straighten your finger at the middle joint, and not being able to bend your fingertip.


Having examined your finger, your specialist can usually back up a diagnosis of boutonniere deformity with X-rays to discover the extent of the damage to your bones and tendon.


Non-operative treatment: this may involve wearing a splint to straighten the joint and stop the tendon ends from separating while they’re healing; you will usually have to wear this for four to six weeks.

Surgery: if the tendon is completely torn, the bones have become displaced (out of alignment) or your symptoms don’t improve having worn a splint, you may need to have surgery; the sooner this is carried out, the easier it is to treat the condition.

Important: This information is only a guideline to help you understand your treatment and what to expect. Everyone is different and your rehabilitation may be quicker or slower than other people’s. Please contact us for advice if you’re worried about any aspect of your health or recovery.

This type of surgery is carried out to relieve nerve entrapment (cubital tunnel syndrome)
This procedure is used to release the ulnar nerve when it’s compressed at the elbow. The cubital tunnel sheath is cut and split into two, making the tunnel larger and releasing pressure on the nerve.
Arthroscopy allows surgeons to use a type of keyhole surgery to diagnose and treat joint problems.
Joint replacement is less common in the wrist than in other joints such as the knee or hip but can help if there is osteoarthritis or rheumatoid arthritis that has not improved with other treatments or surgery.

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