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BioMed Research International
Volume 2017, Article ID 2034782, 7 pages
Clinical Study

The Effect of Patient-Specific Instrumentation Incorporating an Extramedullary Tibial Guide on Operative Efficiency for Total Knee Arthroplasty

1Joint Reconstruction Center, Department of Orthopaedic Surgery, Yonsei Sarang Hospital, 10 Hyoryeong-ro, Seocho-gu, Seoul 06698, Republic of Korea
2Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea

Correspondence should be addressed to Yong-Gon Koh; moc.liamg@hokgyso

Received 6 January 2017; Revised 19 April 2017; Accepted 16 May 2017; Published 3 August 2017

Academic Editor: Carla Renata Arciola

Copyright © 2017 Oh-Ryong Kwon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This retrospective study was to determine if patient-specific instrumentation (PSI) for total knee arthroplasty (TKA) leads to shortened surgical time through increased operating room efficiency according to different tibial PSI designs. 166 patients underwent primary TKA and were categorized into three groups as follows: PSI without extramedullary (EM) tibial guide (group 1, ), PSI with EM tibial guide (group 2, ), and conventional instrumentation (CI) group (group 3, ). Four factors were compared between groups, namely, operative room time, thickness of bone resection, tibial slope, and rotation of the component. The mean surgical time was significantly shorter in the PSI with EM tibial guide group (group 2,  min) compared to the CI group (group 3,  min) (). However, there was no significant difference in the PSI without EM tibial guide group (group 1,  min). This study suggests that PSI incorporating an EM tibial guide may lead to high operative efficiency in TKA compared to CI. This trial is registered with KCT0002384.