Abstract: Objective To study the clinical effect of reconstruction of metacarpophalangeal joint defect with semi-hook carpometacarpal joint surface transplantation.Methods Eighty-two patients with metacarpophalangeal joint defects admitted to our hospital from May 2014 to November 2018 were enrolled and randomly divided into control group (40 cases) and observation group (42 cases) by random number table.The control group was treated with traditional metacarpophalangeal arthroplasty, while the observation group was treated with semi-hook carpometacarpal joint surface reconstruction surgery.The clinical efficacy, recovery time, treatment cost, and incidence of postoperative complications of the two groups were compared.Results After treatment, the total clinical effective rate of the observation group (95.24%) was higher than that of the control group (77.50%), the recovery time was faster, the treatment cost was higher, and the postoperative complication rate (2.50% vs 17.50%) was lower (P<0.05).Conclusion Reconstruction of metacarpophalangeal joint transplantation with semi-hook carpometacarpal joint can accelerate recovery, and has fewer postoperative complications.Its significant clinical efficacy allows it to be popularized.

Key words: Metacarpophalangeal joint defect, Semi-hook carpometacarpal joint surface transplantation, Clinical efficacy, Complication