US 12,239,383 B2
Trial-first measuring device for use during revision total knee arthroplasty
Roger Ryan Dees, Jr., Drummonds, TN (US)
Assigned to SMITH & NEPHEW, INC., Memphis, TN (US); SMITH & NEPHEW ORTHOPAEDICS AG, Zug (CH); and SMITH & NEPHEW ASIA PACIFIC PTE. LIMITED, Singapore (SG)
Filed by Smith & Nephew, Inc., Memphis, TN (US); Smith & Nephew Asia Pacific Pte. Limited, Singapore (SG); and Smith & Nephew Orthopaedics AG, Zug (CH)
Filed on Jun. 16, 2022, as Appl. No. 17/842,116.
Application 17/842,116 is a continuation of application No. 17/420,493, granted, now 11,364,081, previously published as PCT/US2021/013608, filed on Jan. 15, 2021.
Claims priority of provisional application 62/961,304, filed on Jan. 15, 2020.
Prior Publication US 2022/0323155 A1, Oct. 13, 2022
Int. Cl. A61B 34/10 (2016.01); A61B 17/15 (2006.01); A61F 2/38 (2006.01); A61F 2/46 (2006.01); A61B 34/20 (2016.01); A61B 34/30 (2016.01); A61B 90/50 (2016.01)
CPC A61B 34/10 (2016.02) [A61B 17/155 (2013.01); A61F 2/38 (2013.01); A61F 2/4684 (2013.01); A61B 2034/105 (2016.02); A61B 2034/108 (2016.02); A61B 2034/2051 (2016.02); A61B 2034/2055 (2016.02); A61B 34/30 (2016.02); A61B 90/50 (2016.02)] 10 Claims
OG exemplary drawing
 
1. A trial guide system for planning a revision arthroplasty of a joint of a patient, the trial guide system comprising:
a body having an articulating surface and a posterior surface substantially orthogonal to the articulating surface, wherein the body is configured to be coupled to a resected end surface of a bone of the joint;
a distal spacer coupled to the body and configured to translate with respect to the articulating surface to adjust a first gap between the distal spacer and the articulating surface;
a posterior spacer coupled to the body and configured to translate with respect to the posterior surface to adjust a second gap between the posterior spacer and the posterior surface;
a trial stem configured to be received through a longitudinal bore in the bone and into an intramedullary canal of the bone;
a stem adapter joining the trial stem to the body opposite the distal spacer, wherein the stem adapter is configured to translate with respect to the posterior surface of the body to adjust an anterior-posterior alignment of the trial stem with the articulating surface; and
one or more offset couplers configured to join the stem adapter to the trial stem, each offset coupler configured to adjust at least one of:
a lateral alignment of the trial stem and the articulating surface, and
an angular offset between a longitudinal axis of the trial stem and the articulating surface.