The present invention comprises the provision and use of new and improved arthroscopic instrumentation for (i) harvesting a tissue biopsy from a non-critical section of a joint, and (ii) sizing and seating an autologous graft at an implant site. An exemplary arthroscopic cartilage biopsy tool may comprise: an outer tube comprising a distal end, a proximal end, and a lumen extending between the distal end and the proximal end an inner core comprising a shaft having a distal end and a proximal end, and at least one blade mounted to the distal end of the shaft and the inner core being rotatably mounted within the lumen of the outer tube such that the at least one blade protrudes beyond the distal end of the outer tube.Cette invention concerne lélaboration et lutilisation dun nouvel instrument amélioré utilisé en arthroscopie pour (i) prélever une biopsie dans une section non critique dune articulation, et (ii) dimensionner et mettre en place un greffon autologue dans un site dimplantation.