US 12,433,770 B2
Modular instrument system for use in a knee joint replacement operation
Franz-Peter Firmbach, Emmingen-Liptingen (DE); Housseyn Zouaghi, Chaumont (FR); and Jana Bork, Radolfzell (DE)
Assigned to Aesculap AG, Tuttlingen (DE)
Filed by Aesculap AG, Tuttlingen (DE)
Filed on Sep. 13, 2023, as Appl. No. 18/466,514.
Claims priority of application No. 10 2022 210 214.2 (DE), filed on Sep. 27, 2022.
Prior Publication US 2024/0099852 A1, Mar. 28, 2024
Int. Cl. A61F 2/46 (2006.01); A61F 2/38 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/4684 (2013.01) [A61F 2/3859 (2013.01); A61F 2/389 (2013.01); A61F 2/461 (2013.01); A61F 2/4657 (2013.01); A61F 2002/30736 (2013.01); A61F 2002/4661 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A modular instrument system for use in a knee joint replacement operation, the modular instrument system comprising:
at least one tibial component having a topside and an underside opposite the topside, wherein the underside of the at least one tibial component has a distally oriented flat contact surface, which is configured to bear on a resected proximal tibia,
a first femoral component having a topside and an underside parallel opposite the topside of the first femoral component, wherein the topside of the first femoral component has a proximally oriented, flat first contact surface, which is spaced apart from the underside of the first femoral component by a proximodistal first thickness and is configured to bear on a resected femur,
a second femoral component having a topside and an underside parallel opposite the topside of the second femoral component, wherein the topside of the second femoral component has a proximally oriented, flat second contact surface, which is spaced apart from the underside of the second femoral component by a proximodistal second thickness and is configured to bear on a distal femoral cutting jig and to alternatively bear on a posterior femoral cutting jig,
at least one spacer element having a topside and an underside spaced apart from the topside of the at least one spacer element in parallel by a proximodistal spacing thickness, wherein the underside of the at least one spacer element has a distal connecting portion, which is configured for releasable connection to a complementary proximal connecting portion of the topside of the at least one tibial component, wherein the topside of the at least one spacer element has a proximal connecting portion, which is configured for releasable connection to a complementary distal connecting portion of the underside of the first femoral component and for alternative releasable connection to a complementary distal connecting portion of the underside of the second femoral component,
wherein the modular instrument system is configured for forming at least a first instrument configuration and a second instrument configuration, wherein in the first instrument configuration the first femoral component and the at least one spacer element are releasably connected to each other, and wherein in the second instrument configuration the second femoral component and the at least one spacer element are releasably connected to each other,
wherein the at least one spacer element comprises a plurality of spacer elements of different thicknesses with different spacing thicknesses, wherein the plurality of spacer elements of different thicknesses are interchangeably usable individually and/or usable in combination stacked on top of one another.