Disclosed are a method for limiting diffusion of wear debris of an in vivo implant, and an in vivo implantation device having a wear debris limiting function. In the present invention, an elastic sealing member is provided at a wear portion between implant components that can move relatively and cause wear, such that a wear debris outlet of an implant is always sealed within a sealed area formed by the sealing member and the implant components to prevent wear debris from diffusing outwards； the elastic sealing member at least comprises a flexible buffer portion； and the flexible buffer portion is used for reducing or completely offsetting relative movement between the implant components, thereby reducing the wear of a sealing portion of the elastic sealing member due to the relative movement between the components. According to the present invention, the problem of wear debris escape is solved； the sealing member is tightly attached to the components of the implant, such that the wear debris cannot escape； and a force of friction between the sealing member and the implant is less than a force for driving the components to move relatively, such that the relative movement between the components cannot be stopped.L'invention concerne un procédé pour limiter la diffusion de débris d'usure d'un implant in vivo, et un dispositif d'implantation in vivo possédant une fonction de limitation de débris d'usure. Dans la présente invention, un élément d'étanchéité élastique est disposé au niveau d'une partie d'usure entre des composants d'implant qui peuvent se déplacer relativement et provoquer une usure, de telle sorte qu'une sortie de débris d'usure d'un implant soit en permanence scellée à l'intérieur d'une zone hermétique formée par l'élément d'étanchéité et les composants d'implant pour empêcher que des débris d'usure se diffusent vers l'extérieur； l'élément d'étanchéité élastique comprend au moins une partie tampon souple； et la partie tampon souple est utilisée pour rédu
