According to Official Guinness Records,
An international team of eight surgeons stitched the hand of a dead man to the wrist of 48-year-old Clint Hallam (New Zealand) in 1998, after he had suffered a chainsaw accident nine years previously. The fourteen hour operation at Lyon, France involved attaching bones in the new hand to exposed bones in Hallam's wrist. The bones were fixed using a metal plate with screws. Surgeons then stitched the two main arteries, the radial and cubital and upto 12 veins before connecting the nerves, muscles and tendons. Two years after the operation, Hallam complained that the hand from a motorcycle accident victim, was too pink and the wrong size. The hand was then amputated at his request on 3 February 2001.
For a complete list of 1998 records, please visit 1998 Guinness Records in France.