Medial Overhang of the Tibial Component Is Associated With Higher Risk of Inferior Knee Injury and Osteoarthritis Outcome Score Pain After Knee Replacement

TY - JOUR

T1 - Medial Overhang of the Tibial Component Is Associated With Higher Risk of Inferior Knee Injury and Osteoarthritis Outcome Score Pain After Knee Replacement

AU - Nielsen, Christian S

AU - Nebergall, Audrey

AU - Huddleston, James

AU - Kallemose, Thomas

AU - Malchau, Henrik

AU - Troelsen, Anders

N1 - Copyright © 2018 Elsevier Inc. All rights reserved.

PY - 2018/5

Y1 - 2018/5

N2 - Background: The aim of this prospective multicenter study is to investigate the association among (1) tibial site-specific overhang of medial, anterior, and lateral overhang in relation to Knee Injury and Osteoarthritis Outcome Score pain 1 year after surgery (1 Y KOOS pain) and (2) the malalignment of TKA components including overall malalignment in relation to 1 Y KOOS pain. Methods: From 10 centers, across 4 continents, 323 patients were enrolled from October 2011 to February 2014. Radiographs were analyzed for tibial overhang on medial, anterior, and lateral site and for overall, tibial, femur, and combined malalignment. A 1 Y KOOS pain score <70 represented an unsatisfactory pain level. Results: A significant association was observed between medial overhang and 1 Y KOOS pain with a cut-off of <70 (P =.04), with an odds ratio of 0.46. No significant associations were observed among the independent variables of lateral and anterior overhang or for overall, tibial, femoral, and combined component malalignment, and the dependent variable of 1 Y KOOS pain <70. Conclusion: This prospective multicenter study showed a significant association between medial overhang of the tibial component and a 1 Y KOOS pain <70. The related odds ratio was 0.46, which demonstrates that medial overhang may lead to a 54% reduced chance for entering an acceptable pain category 1 year after surgery when receiving a TKA.

AB - Background: The aim of this prospective multicenter study is to investigate the association among (1) tibial site-specific overhang of medial, anterior, and lateral overhang in relation to Knee Injury and Osteoarthritis Outcome Score pain 1 year after surgery (1 Y KOOS pain) and (2) the malalignment of TKA components including overall malalignment in relation to 1 Y KOOS pain. Methods: From 10 centers, across 4 continents, 323 patients were enrolled from October 2011 to February 2014. Radiographs were analyzed for tibial overhang on medial, anterior, and lateral site and for overall, tibial, femur, and combined malalignment. A 1 Y KOOS pain score <70 represented an unsatisfactory pain level. Results: A significant association was observed between medial overhang and 1 Y KOOS pain with a cut-off of <70 (P =.04), with an odds ratio of 0.46. No significant associations were observed among the independent variables of lateral and anterior overhang or for overall, tibial, femoral, and combined component malalignment, and the dependent variable of 1 Y KOOS pain <70. Conclusion: This prospective multicenter study showed a significant association between medial overhang of the tibial component and a 1 Y KOOS pain <70. The related odds ratio was 0.46, which demonstrates that medial overhang may lead to a 54% reduced chance for entering an acceptable pain category 1 year after surgery when receiving a TKA.

KW - Adult

KW - Aged

KW - Arthroplasty, Replacement, Knee/adverse effects

KW - Female

KW - Femur/surgery

KW - Humans

KW - Knee Injuries/surgery

KW - Knee Joint/surgery

KW - Knee Prosthesis/adverse effects

KW - Male

KW - Middle Aged

KW - Odds Ratio

KW - Osteoarthritis, Knee/surgery

KW - Pain Measurement

KW - Pain, Postoperative/surgery

KW - Prospective Studies

KW - Radiography

KW - Severity of Illness Index

KW - Tibia/surgery

U2 - 10.1016/j.arth.2017.12.027

DO - 10.1016/j.arth.2017.12.027

M3 - Journal article

C2 - 29452971

SN - 0883-5403

VL - 33

SP - 1394

EP - 1398

JO - Journal of Arthroplasty

JF - Journal of Arthroplasty

IS - 5

ER -