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One or more of your metacarpal bones have been re-stabilized using aids.

The hand is made up of a lot of small bones and joints. Immediately after the forearm is the carpus. Then comes the metacarpus and then the individual fingers. The metacarpus forms the palm of the hand and the back of the hand. It consists of the longish metacarpal bones. There is one metacarpal bone for each finger.

Your metacarpal bone fragments were stabilized using one or more long pins inside the bone.

The purpose of the long pins is to stabilize the metacarpal bone from within. To achieve this, they are inserted into the space inside the bone. The long nails are inserted through bones and join these bones together. Joints, for example, can be temporarily reinforced like this.