The functional reconstruction of the floating thumb is to surgically reconstruct the function and shape of the thumb. The most advanced surgical option currently used is hemi-metacarpal bone graft reconstruction (SMRT floating thumb reconstruction), which means that a portion of bone is taken from the child’s second metacarpal bone to reconstruct the first metacarpal bone. The entire surgery is performed on the child’s hand and does not affect other parts of the child’s body, nor does it affect the growth and development of the second metacarpal bone after the surgery. Of course, the careful surgical design and implementation is only part of the reconstruction of the thumb, the other part is the post-operative functional exercise, which is easily ignored by parents. You can give your child favorite toys or guide him/her to do actions such as pinching green beans, writing and drawing with a pen, etc., so that he/she can exercise the function of the thumb. A well-functioning thumb is not too bad in appearance, so parents must pay attention to the recovery exercises for their child’s floating finger after surgery.