The Journal of Arthroplasty
Volume 27, Issue 6 , Pages 940-944, June 2012

Change in Pelvic Tilt Angle 2 to 4 Years After Total Hip Arthroplasty

  • Naoya Taki, MD

      Affiliations

    • Department of Orthopaedic Surgery, Yokohama City University Medical Center, Yokohama, Japan
    • Corresponding Author InformationReprint requests: Naoya Taki, MD, Department of Orthopaedic Surgery, Yokohama City University Medical Center, 4-57 Urafunecho Minami-ku, Yokohama, 232-0024, Japan.
    • ,
  • Naoto Mitsugi, MD, PhD

      Affiliations

    • Department of Orthopaedic Surgery, Yokohama City University Medical Center, Yokohama, Japan
    • ,
  • Yuichi Mochida, MD, PhD

      Affiliations

    • Center for Rheumatoid Disease, Yokohama City University Medical Center, Yokohama, Japan
    • ,
  • Yasushi Akamatsu, MD, PhD

      Affiliations

    • Department of Orthopaedic Surgery, Yokohama City University Medical Center, Yokohama, Japan
    • ,
  • Tomoyuki Saito, MD, PhD

      Affiliations

    • Department of Orthopaedic Surgery, Yokohama City University, Graduate School of Medicine, Yokohama, Japan

Received 14 September 2010; accepted 6 October 2011. published online 24 November 2011.

Abstract 

The purpose of this study was to evaluate the change in pelvic tilt angle (PA) in the sagittal plane in the standing and supine positions for 2 to 4 years after total hip arthroplasty (THA). Anteroposterior pelvic radiographs of 21 male and 65 female patients were investigated before and after THA yearly over 2 to 4 years. Both the standing and supine PA significantly posteriorly tilted after THA. The difference in PA between the standing and supine positions (dPA) significantly increased after THA. Although the PA in the standing and supine positions plateaued 1 year after THA, the dPA gradually increased. In addition, the percentage of patients who showed a difference of more than 10° in dPA tended to increase yearly. In particular, elderly female patients who showed posterior tilt in PA in the standing or supine positions or a large dPA before THA tended to show a dPA of more than 10° after THA.

Keywords: total hip arthroplasty (THA), pelvic tilt, sagittal alignment, cup anteversion, standing position, cup orientation

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 The Conflict of Interest associated with this article can be found at doi:10.1016/j.arth.2011.10.003.

PII: S0883-5403(11)00524-9

doi:10.1016/j.arth.2011.10.003

The Journal of Arthroplasty
Volume 27, Issue 6 , Pages 940-944, June 2012

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