US 12,426,908 B2
Preferential removal of cartilage
Zachary Korman, Memphis, TN (US)
Assigned to WRIGHT MEDICAL TECHNOLOGY, INC., Memphis, TN (US)
Appl. No. 18/041,556
Filed by WRIGHT MEDICAL TECHNOLOGY, INC., Memphis, TN (US)
PCT Filed Aug. 4, 2021, PCT No. PCT/US2021/071091
§ 371(c)(1), (2) Date Feb. 14, 2023,
PCT Pub. No. WO2022/094499, PCT Pub. Date May 5, 2022.
Claims priority of provisional application 63/106,457, filed on Oct. 28, 2020.
Prior Publication US 2023/0301677 A1, Sep. 28, 2023
Int. Cl. A61B 17/16 (2006.01); A61B 17/32 (2006.01); A61B 17/56 (2006.01)
CPC A61B 17/32002 (2013.01) [A61B 17/1615 (2013.01); A61B 2017/564 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for preferentially removing cartilage from a bone in a joint comprising:
inserting a burr into a joint comprised of cartilage attached to subchondral bone; and
maneuvering the burr within the joint against the cartilage while rotating the burr at a speed not more than about 10,000 revolutions per minute (rpm), wherein the burr comprises a plurality of cutting flutes that have a negative rake angle of −15 to −50 degrees, whereby the cartilage is preferentially removed from the subchondral bone and the rotating burr provides a tactile feedback to the operator when the rotating burr has gone through the cartilage and contacts the subchondral bone.