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Mallet finger is an injury which results in the inability extend or straighten the end joint of a finger without assistance.
Symptoms of mallet finger
Symptoms of a mallet finger include pain in the end of the finger with particular tenderness when touching the back of the finger. The giveaway sign is that the patient will be unable to straighten the end joint of the finger without assistance or considerable pain.
What is Mallet Finger?
There are no muscles in the fingers, instead they are moved by long tendons which connect to muscles in the hand and forearm. When the muscles contract the tendons move in channels through the wrist and up to the end of the fingers to produce movement.
On the back of the finger a long tendon of the extensor digitorum communis muscle attaches. When the muscle contracts, the finger straightens. If this tendon is damaged, torn or injured then the ability to straighten the finger is affected. The degree of damage can range from a minor stretching of the tendon, to an avulsion of the tendon which means it has come away from the bone altogether.
Mallet finger occurs most frequently from to a ball for example a basketball striking the finger tip, forcing it to bend, whilst the extensor muscles are contracting. In other words stubbing the finger. It can also be injured doing work related or household activities such as making the bed.
Mallet finger treatment
If there is no avulsion or fracture, then a mallet finger splint may be worn for up to eight weeks. This holds the end joint of the finger in an extended position to allow the tendon to heal correctly. It is also recommended that this type of splint or taping is used for an additional 1-2 months when returning to sport or overnight for sleeping.
It is essential that the patient wears the splint all the time except when washing the finger and even then they must keep the finger straight. Failure to be strict on wearing the mallet finger splint may result in the injury not healing correctly and the patient will be left with a drooping finger tip requiring further treatment or surgery.
If this is the case or in more complicated injuries where the tendon has come completely away from the bone, mallet finger surgery may be performed to reattach the tendon to the bone and realign any fractures. Again a period of immobilization will follow. Mr. Elliot Sorene MBBS FRCS (Tr & Orth) EDHS Consultant Orthopaedic, Hand & Upper Limb Surgeon explains Mallet finger surgery.
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