Journal of Artificial Organs

, Volume 20, Issue 2, pp 152–157 | Cite as

Improvement of activities of daily living after total hip arthroplasty using a computed tomography-based navigation system

  • Yuki MaedaEmail author
  • Nobuo NakamuraEmail author
  • Nobuhiko Sugano
Original Article Artificial Skin, Muscle, Bone / Joint, Neuron


The purpose of this study was to evaluate the outcome improvements after total hip arthroplasty (THA) using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients who underwent THA with a navigation system in our institutions. The subjects were 219 patients. All patients had adequate data to allow complete scoring of the WOMAC for a 1-year postoperative follow-up. CT-based navigation was used in all THAs. Postoperatively, no restrictions were imposed on patients’ ADL. One year after surgery, the average WOMAC pain subscale score was 1.8 ± 2.9, the stiffness subscale score was 1.1 ± 1.6, and the physical function subscale score was 7.5 ± 11.6 points. The number of patients whose score for the WOMAC physical function score was 0 points was 61 (27.9%). A lower WOMAC score usually represents a better status. In some of the most difficult functions, such as ascending stairs, bending to the floor, putting on socks/stockings, and heavy domestic duties, the scores tended to be higher than the other scores postoperatively. These results show that THA using navigation can improve patients’ postoperative QOL.


Quality of life WOMAC CT-based navigation Total hip arthroplasty 


Compliance with ethical standards

Conflict of interest

The authors report no commercial associations that might pose a conflict of interest in connection with this article.


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Copyright information

© The Japanese Society for Artificial Organs 2017

Authors and Affiliations

  1. 1.Center of ArthroplastyKyowakai HospitalSuitaJapan
  2. 2.Department of Orthopedic Medical EngineeringOsaka University Graduate School of MedicineSuitaJapan

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