Surgical instrument for scraping and collecting bone particles

A surgical tool for scraping and collecting bone particles, comprising:

• a handle provided with a handgrip;
• a collection chamber having an end proximal to the handgrip and a free distal end;
• a stem at least partially arranged inside the collection chamber;
• a blade fixed to a front end of the stem, wherein the blade protrudes radially from the stem and is axially arranged outside the collection chamber near the distal end thereof, and
• a spacer interposed between a rear face of the blade and the distal end of the collection chamber, wherein the spacer defines a passage opening for introducing the bone particles scraped by the blade into the collection chamber, maintaining at a predetermined non-zero axial distance, for at least a circumferential tract thereof, the rear face of the blade from the distal end of the collection chamber,
• wherein the spacer has an annular shape with a first face and a second face, the spacer comprising
• a central hole coaxial with the stem and
• an asymmetrical outer perimeter provided with
• a circular portion configured to define a contact portion of the second face, wherein the contact portion is configured to contact the distal end of the collection chamber, and
• a recess adapted to be radially separated from the distal end of the collection chamber,
• wherein the passage opening is delimited, in an axial direction, by a portion of a scraping edge of the blade and by a circumferential portion of the distal end of the collection chamber and, in a circumferential direction, by the recess of the spacer.