US 12,285,201 B2
Tool system for removing prosthetic cement from a bone of a patient undergoing a joint prosthesis replacement operation
Bart Cornelis Hendrikus Van Der Wal, Utrecht (NL); Henri Charles Vogelij, Utrecht (NL); Hermannus Hendricus Weinans, Utrecht (NL); and Lucas Alphonsus Maria Evers, Utrecht (NL)
Assigned to UMC UTRECHT HOLDING B.V., Utrecht (NL)
Filed by UMC UTRECHT HOLDING B.V., Utrecht (NL)
Filed on Oct. 13, 2023, as Appl. No. 18/486,437.
Application 18/486,437 is a continuation of application No. 16/973,466, granted, now 11,801,080, previously published as PCT/EP2019/066782, filed on Jun. 25, 2019.
Claims priority of application No. 2021191 (NL), filed on Jun. 27, 2018.
Prior Publication US 2024/0108390 A1, Apr. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/14 (2006.01); A61B 17/15 (2006.01); A61B 17/88 (2006.01); A61F 2/46 (2006.01)
CPC A61B 17/8847 (2013.01) [A61B 17/149 (2016.11); A61B 17/15 (2013.01); A61F 2/4607 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A tool system comprising a guide member and cutting tool for removing prosthetic cement from a bone of a patient undergoing a joint prosthesis replacement operation,
wherein the cutting tool is configured for forming a running cut substantially completely through the prosthetic cement along a line of intersection, wherein at least one profile of the line of intersection of a prosthetic cement/bone interface at its intersection with a generally longitudinally pre-selected plane is obtained by scanning the patient in the area of the joint prothesis;
wherein the cutting tool has dimensions to be inserted into the prosthetic cavity at least substantially to the bottom end thereof and comprises;
a cutting element arranged to cut the prosthetic cement at one outer end of said cutting tool; and
two guiding pins, which guiding pins are located on the cutting tool at a mutual distance apart; and
wherein the guide member is substantially shaped as a stem of the prosthesis in the prosthetic cavity located in the prosthetic cement; and
wherein the guide member is provided with two longitudinally running guiding grooves which each are arranged to engage one of said guiding pins of the cutting tool, wherein the guiding grooves are profiled such that the outer end of the cutting tool at which the cutting element is arranged to cut the prosthetic cement, when inserted into the prosthetic cavity and being moved to at least substantially to the bottom end thereof, is forced to follow a path corresponding to the profile of the line of intersection of the cement/bone interface.