1, can preserve the child’s thumb If a child with floating thumb undergoes thumb surgery, the child will only have four fingers forever after surgery, which is unacceptable to many parents and children. Metacarpal bone graft reconstruction surgery can preserve the child’s thumb and the child will have five fingers after surgery. 2.No need to take bones from the child’s foot If a child with floating bunion chooses metatarsal reconstruction surgery, then the metatarsal bone from the child’s foot will be transplanted to the hand to reconstruct the first metacarpal bone and the first carpal metacarpal joint, and the child’s foot will need to be fixed in a cast after surgery, and the foot will not be able to touch the ground for at least three months, and the post-operative care is complicated. Compared with the traditional metatarsal bone reconstruction, the metacarpal bone graft does not need to take the bone from the child’s foot to reconstruct the first metacarpal bone, so that the child’s foot will not be affected in any way and the post-operative care is simple. 3. The chance of bone resorption and necrosis is reduced. Whether the metatarsal bone reconstruction is free bone graft or anastomotic vascular bone graft, there is a certain chance of bone resorption and necrosis of the graft. However, the chance of bone resorption and necrosis will be greatly reduced with metacarpal bone graft reconstruction. 4. The earlier the surgery is performed, the earlier the function of the thumb is established. Previously, it was recommended that children undergo metatarsal reconstruction surgery at 1 or 1.5 years of age or older, but successful metacarpal graft reconstruction advances the age at which children can undergo surgery to 6 months to 1 year of age, which can help children establish thumb function earlier. 5. Satisfactory post-operative recovery After metatarsal reconstruction surgery, the function and shape of the child’s thumb can also be improved, but a surgical scar will remain on the child’s foot. After metacarpal bone graft reconstruction surgery, it does not affect the growth and development of the second metacarpal bone, and the functional and shape recovery after surgery is more satisfactory compared with that before surgery.