目的　以第2跖趾关节的解剖学特点为基础，探讨改良的第2跖趾关节复合组织游离移植修复手部掌指关节复合组织缺损的方法及临床疗效。  方法　根据掌指关节的缺损情况，采用改良的第2跖趾全关节复合组织移植7例、第2跖趾半关节复合组织移植5例修复手部创伤后掌指关节的复合组织缺损。  结果　12例全部成活。术后随访6个月~3年，掌指关节的功能恢复较满意，X片显示：骨折愈合良好，未见关节退行性改变。第2跖趾的半关节移植组功能恢复优于全关节移植组。 结论   改良的第2跖关节复合组织移植是修复掌指关节复合组织缺损较有效的方法。

Objective　Basing on anatomic characteristics of the second metatarsophalangeal joint, we studied the method and clinical effects of reconstructing  composite tissue defects in the metacarpophalangeal joint by transplantation of modified composite tissue  in the second  metatarsophalangeal joint.　Methods　　According  to the defects of the metacarpophalangeal joint , modified composite tissue in the second  metatarsophalangeal joint transplantation was conducted to reconstruct metacarpophalangeal joint: total  metatarsophalangeal joint transplantation  in 7 cases, semi-joint transplantation  in 5 cases.　Results　All reconstructed metacarsophalangeal joints survived in 12 cases. With follow-ups for 6~36 months, all cases have no joint degeneration in X-ray manifestation and the restoration of joint function is satisfying; the function of cases with metatarsophalangeal semi-joint transplantation was better than those in total joint transplantation.. Conclusions　It is an effective method to reconstruct composite tissue defects in the metacarpophalangeal joint by transplantation of composite tissue in the second metatarsophalangeal joint.