Medically, this should be called "compound thumb deformity or polydactyly", and its due function can be restored as soon as possible through correction or surgery. The following documents, I hope to help you: the treatment of thumb compound deformity is often more complicated than expected, and its pathological changes involve the shape and development of phalanges and metacarpals, the composition of interphalangeal joints and metacarpophalangeal joints, and the development of lateral collateral ligaments; The internal muscles of the hand are stunted and lost to varying degrees, and the flexor and extensor tendons of the thumb have variation, displacement and abnormal anchorage. If it is simply removed, it will often bring deformity, joint instability and thumb dysfunction. Type I: The treatment is relatively simple. If one side is well developed and its position is normal, while the other side is poorly developed and its position is deviated, the stunted thumb can be simply removed and its joint capsule and lateral collateral ligament can be repaired. When the two fingers are equally developed, the skin, nails, soft tissues and adjacent phalanges between the two repeated fingers can be "V"-shaped, and the "Y"-shaped phalanges can be transformed into complete normal phalanges to repair joint capsules and flexors and extensors. Type Ⅱ: Most proximal phalanges are widened due to the use of 1 joint between two fingers. Surgical removal of relatively underdeveloped fingers, wedge-shaped removal of proximal phalanx, correction of thumb deviation, repair of joint capsule and lateral collateral ligament. Type ⅲ: Because the proximal phalanx of the thumb is Y-shaped, when repeatedly cutting off the underdeveloped thumb, osteotomy should be done to keep the finger root bifurcation and bite off the cortical bone at the bifurcation to correct the metacarpophalangeal joint deformity, and osteotomy should also be done to correct the interphalangeal joint deformity, and attention should be paid to the repair of the joint capsule side collateral ligament. If the amputated thumb is on the radial side, abductor pollicis brevis should be re-fixed at the base of the proximal phalanx. If it is on the ulnar side, the adductor pollicis should be reconstructed. Type Ⅳ: Resection of relatively undeveloped compound thumb, wedge osteotomy of distal metacarpal bone, correction of deviation, repair of joint capsule, lateral collateral ligament, abductor pollicis brevis or adductor pollicis. V-type and VI-type: These two types are often accompanied by the development of thenar muscle, which is often attached to redundant fingers. It is necessary to sew the thenar muscle stop point on the joint capsule outside the finger joint to rebuild the stop point. First, the tendons and nerves of the redundant fingers are cut off, and the intrinsic blood vessels are ligated. V-shaped osteotomy at metacarpal bone to remove redundant fingers, wedge osteotomy at metacarpal bone to correct deviation. Type ⅵ amputated the redundant fingers of carpometacarpal joint and repaired the carpometacarpal joint capsule. ⅶ type: this type of deformity is diversified, and the corresponding correction methods are selected according to different deformities. In the plastic surgery of compound thumb deformity, patients with ⅲ-ⅷ type should be given comprehensive plastic surgery, including removing the redundant fingers, and using the vascular nerve island flap, tendon, bone, joint and its surrounding collateral ligaments of the redundant fingers to repair and rebuild the skin, bone, joint, ligament and tendon dynamic function of the remaining fingers. Watch all the videos: fashion beauty issues, youthful skin issues, plastic surgery, laser articles, concern for health,No. 170, concern for health,No. 169.