Levitation thumb is actually a floating thumb. What do you mean by floating thumb? It is actually type IIIB, IIIC and IV thumb dysplasia, which is manifested by the absence of a complete metacarpal bone attached to the palm of the hand, and the thumb can swing around. In the past, most of the floating thumbs were removed and the index finger was used as a thumb, so that the whole hand was four fingers after surgery. The good thing is that the surgery is relatively simple and the results are relatively definite, but the bad thing is that the fingers are missing forever and the child is left with four fingers. Now the floating thumb can be preserved, as long as the parents are willing to do so, our doctors will try to preserve it. At present, the main options to preserve the five fingers of the floating thumb are metatarsal bone graft reconstruction and hemimelia bone graft reconstruction, the treatment options are different and the age at which the child can be operated is also different. If you want to take the metatarsal bone, that is, the bone from the foot, free direct finger bone and anastomotic vascularized finger bone with a vascularized tip, they are not the same operation time. In the case of free phalanges, the age of surgery can be relatively young, but not too young, as it will affect the operation and postoperative recovery of the surgeon. If the finger bone is anastomosed with a vascular tip, the age of surgery should be relatively older. In the case of hemi-metacarpal bone graft reconstruction, a portion of the child’s second metacarpal bone is taken to reconstruct the first metacarpal bone, and we can operate between the age of 6 months and 1 year. This means that hemi-metacarpal reconstruction can help the child establish thumb function earlier.