US 12,256,950 B2
Patient-specific guide for total prosthetic knee revision
Francesco Siccardi, Castel San Pietro (CH); Massimiliano Bernardoni, Castel San Pietro (CH); Andrea Parrinello, Castel San Pietro (CH); and Gianluca Gargantini, Castel San Pietro (CH)
Assigned to Medacta International SA, Castel San Pietro (CH)
Appl. No. 17/602,436
Filed by MEDACTA INTERNATIONAL SA, Castel San Pietro (CH)
PCT Filed Mar. 16, 2020, PCT No. PCT/IB2020/052371
§ 371(c)(1), (2) Date Oct. 8, 2021,
PCT Pub. No. WO2020/208441, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 102019000005430 (IT), filed on Apr. 9, 2019.
Prior Publication US 2022/0167998 A1, Jun. 2, 2022
Int. Cl. A61B 17/17 (2006.01); A61B 17/16 (2006.01)
CPC A61B 17/1764 (2013.01) [A61B 17/1615 (2013.01)] 31 Claims
OG exemplary drawing
 
1. A patient-specific surgical guide to apply a total prosthetic knee revision, comprising:
a femoral component configured to exclusively couple with a distal end of a femur bearing a femoral prosthesis attached to a femoral bone;
wherein the femoral component has:
a distal portion configured to face the distal end of the femur, bearing at least two distal positioning holes configured to face a distal region of the femoral prosthesis when the femoral component is coupled with the distal end of the femur; and
a first bracket extending from a first side of the distal portion and a second bracket extending from a second side of the distal portion, wherein the first and second sides are opposite each other relative to a longitudinal axis of the distal portion,
wherein a lateral abutment extends from each bracket in a direction toward the longitudinal axis of the distal portion, and each lateral abutment terminates at a third abutment area that is configured to abut epicondylar regions of the femoral bone;
a frontal portion extending on a continuation of the distal portion and displaying a first abutment area configured to act in abutment against a femur bone part in a cortical frontal region of the femur, and a second area configured to face a frontal region of the femoral prosthesis, when the femoral component is coupled with the distal end of the femur;
wherein the frontal portion defines:
at least two guide holes, extending parallel to each other through the frontal portion at the first abutment area; and
at least two frontal positioning holes extending through the frontal portion at the second area.