J Knee Surg 2018; 31(05): 448-452
DOI: 10.1055/s-0037-1604144
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Factors Contributing to Patient Satisfaction and Expectations following Computer-Assisted Total Knee Arthroplasty

Masahiro Hasegawa
Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
,
Yohei Naito
Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
,
Toshio Yamaguchi
Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
,
Hiroki Wakabayashi
Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
,
Akihiro Sudo
Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Tsu City, Mie, Japan
› Author Affiliations
Further Information

Publication History

01 December 2016

31 May 2017

Publication Date:
18 July 2017 (eFirst)

Abstract

The purpose of this study was to determine which factors contribute to patient satisfaction and expectations after total knee arthroplasty (TKA). A total of 109 patients (130 knees) with knee osteoarthritis who underwent primary TKA with navigation were studied. Intraoperative mediolateral laxity was measured. The factors including mediolateral laxity that affected patient satisfaction and expectations were evaluated using the 2011 Knee Society Score. Patient satisfaction after TKA correlated positively with symptoms and functional activities, and negatively with old age in univariate analysis. Multivariate analysis showed that symptoms and functional activities remained statistically significant; however, old age showed no difference. Patient expectations after TKA correlated positively with symptoms and functional activities, and negatively with mediolateral laxity at 60 degrees in univariate analysis. Multivariate analysis showed that symptoms, functional activities, and mediolateral laxity at 60 degrees remained statistically significant. In conclusion, midflexion instability was associated with worse expectations.