Bennett Fracture: Cause & Treatments

A Bennett fracture happens when the bone located at the base of the thumb dislocates and breaks. It can be due to a sudden trauma during high impact sports or accidents. A Bennett fracture will result in swelling of the thumb, pain and the inability to use the thumb. In this article, we will look at the causes and treatments for Bennett fractures.


The causes of a Bennett’s fracture can differ. However, it happens when the metacarpal bone located in the arm fractures and breaks. This can be due to any kind of forces that will result in a huge impact sufficient to break it.


Treatment is classified into non-surgical and surgical. For minor cases where the bones are not misaligned, non-surgical will be more than sufficient. The initial stages of treatment will involve the famous RICE therapy – Rest, Ice, Compression and Elevation. Resting involves immobilising the injured hand and preventing any stresses on it. During this period, the patient is not allowed to participate in any activities. Several times a day, the injured thumb will need to be iced in order to bring down the swelling. To prevent swelling and loss of blood, compression finger sleeves may be worn. This will also help to retain body heat and enhance blood circulation. Lastly, the injured thumb needs to be elevated above the heart to drain away excess blood. Bracing and casting may be required depending on the activity level of individual patients.

Surgical treatment is also classified into invasive and minimally invasive. In minimally invasive surgery, a surgical wire will be inserted through a small incision aided by cameras. However, this method is highly dependent on the stability of the injury and the alignment of the metacarpal bone. If the bones fragments are scattered, an invasive surgery will need to be carried out in order to remove these bone fragments. A small screw will be used to hold the fragments together until they heal on their own. One popular surgical treatment is the Kirschner wire fixation. The K-wires are made up of surgical grade stainless steel and are temporary fixation tools. The pins are drilled into the bones and act as an anchor point for skeletal traction.

Unlike other injuries, Bennett’s fracture cannot really be prevented due to the various uses of the hand and the fingers. However, this fracture can be avoided to a certain extent using medical tapes to tape the thumb and index finger together.




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