Does total hip arthroplasty restore native hip anatomy? three-dimensional reconstruction analysis

Int Orthop. 2014 Aug;38(8):1577-83. doi: 10.1007/s00264-014-2401-3. Epub 2014 Jun 26.

Abstract

Purpose: Component orientations and positions in total hip arthroplasty (THA) are important parameters in restoring hip function. However, measurements using plain radiographs and 2D computed tomography (CT) slices are affected by patient position during imaging. This study used 3D CT to determine whether contemporary THA restores native hip geometry.

Methods: Fourteen patients with unilateral THA underwent CT scan for 3D hip reconstruction. Hip models of the nonoperated side were mirrored with the implanted side to quantify the differences in hip geometry between sides.

Results: The study demonstrated that combined hip anteversion (sum of acetabular and femoral anteversion) and vertical hip offset significantly increased by 25.3° ± 29.3° (range, -25.7° to 55.9°, p = 0.003) and 4.1 ± 4.7 mm (range, -7.1 to 9.8 mm, p = 0.009) in THAs.

Conclusions: These data suggest that hip anatomy is not fully restored following THA compared with the contralateral native hip.

Publication types

  • Comparative Study

MeSH terms

  • Aged
  • Arthroplasty, Replacement, Hip*
  • Female
  • Hip / anatomy & histology*
  • Hip / diagnostic imaging
  • Hip Joint / diagnostic imaging
  • Hip Joint / physiology
  • Hip Joint / surgery*
  • Humans
  • Imaging, Three-Dimensional
  • Male
  • Middle Aged
  • Osteoarthritis, Hip / surgery*
  • Range of Motion, Articular / physiology
  • Tomography, X-Ray Computed
  • Treatment Outcome