US 11,744,707 B2
Methods for repairing anatomical joint conditions
Derek Dee, Rancho Palos Verdes, CA (US); and Chris Maurer, Solana Beach, CA (US)
Assigned to SUBCHONDRAL SOLUTIONS, INC., Los Gatos, CA (US)
Filed by Subchondral Solutions, Inc., Los Gatos, CA (US)
Filed on May 27, 2021, as Appl. No. 17/332,895.
Application 17/332,895 is a continuation of application No. 15/778,196, granted, now 11,039,927, previously published as PCT/US2016/063481, filed on Nov. 23, 2016.
Claims priority of provisional application 62/260,030, filed on Nov. 25, 2015.
Prior Publication US 2021/0298906 A1, Sep. 30, 2021
Int. Cl. A61F 2/30 (2006.01); A61B 17/16 (2006.01); A61F 2/46 (2006.01)
CPC A61F 2/30756 (2013.01) [A61B 17/1615 (2013.01); A61B 17/1635 (2013.01); A61B 17/1675 (2013.01); A61F 2/30 (2013.01); A61F 2/30771 (2013.01); A61F 2/4618 (2013.01); A61F 2002/305 (2013.01); A61F 2002/3085 (2013.01); A61F 2002/30367 (2013.01); A61F 2002/30387 (2013.01); A61F 2002/30405 (2013.01); A61F 2002/30462 (2013.01); A61F 2002/30485 (2013.01); A61F 2002/30784 (2013.01); A61F 2002/30841 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of preparing a defect at a treatment site on a subchondral bone to repair an anatomical joint and ameliorate a joint condition, the method comprising:
surgically accessing the treatment site;
accessing a sizing instrument, the sizing instrument having a proximal end, a distal end, and a cylindrical member disposed between the proximal end and the distal end, the cylindrical member having a lumen for receiving a guidewire;
centrally positioning the distal end of the sizing instrument over the defect at the treatment site on the subchondral bone; the distal end having concentric rings with each ring having a known diameter;
measuring a diameter of the defect by comparing the defect diameter with the closest corresponding known diameter on the sizing instrument;
inserting the guidewire through the lumen of the cylindrical member while the distal end of the sizing instrument is centrally positioned over the defect;
contacting the subchondral bone with a distal end of the guidewire;
marking the center of the defect by reversibly attaching the guidewire to the subchondral bone;
removing the sizing instrument over the guidewire;
selecting a countersink instrument having a diameter substantially matching the measured diameter of the defect;
positioning the countersink instrument over the guidewire;
simultaneously rotating and lowering the countersink instrument to engage a soft tissue and the subchondral bone;
penetrating the subchondral bone with the countersink instrument to form a hole, the hole having a first depth;
removing the countersink instrument over the guidewire;
positioning a cannulated drill over the guidewire;
removing an inner circular portion of the subchondral bone while preserving a central post of subchondral bone in a substantially undisturbed native state by simultaneously rotating and lowering the cannulated drill into a center of the hole, the inner circular portion having a second depth;
removing the cannulated drill over the guidewire;
placing an implantable orthopedic device in the hole over a top of the central post; wherein the central post is accepted by a hollow central column of the implantable orthopedic device when implanted;
securing the implantable orthopedic device into the hole using a driver instrument;
removing the driver instrument;
detaching the guidewire from the subchondral bone; and removing the guidewire.