Affiliations: [a] Department of Orthopedics and Trauma Surgery, University Hospital of Cologne, Cologne, Germany | [b] Department of Orthopedics, St. Franziskus Hospital, Cologne, Germany | [c] Department of Radiology, University Hospital of Cologne, Cologne, Germany | [d] Department of Neurophysiology, Center of Biomedicine and Medical Technology Mannheim, Ruprecht-Karls-University Heidelberg, Mannheim, Germany
Correspondence:
[*]
Corresponding author: Jan Bredow, Department of Orthopedics and Trauma Surgery, University Hospital of Cologne, Kerpener Strasse 62, D - 50937 Cologne, Germany. Tel.: +49 221 478 87294; Fax: +49 221 478 87296; E-mail:jan.bredow@uk-koeln.de
Abstract:
INTRODUCTION:
Changes in pelvic position can influence the sagittal alignment of the
lumbar spine. The restoration of hip kinematics by hip replacement thus
appears to offer the possibility of correcting sagittal alignment. This
preliminary retrospective study used EOS imaging to investigate the
influence of total hip arthroplasty on pelvic parameters in patients with
normal preoperative pelvic parameters. METHODS:
Twenty patients with hip osteoarthritis undergoing total hip arthroplasty
(THA) between 2011 and 2012 received unilateral THA. To evaluate the
preoperative and postoperative changes of the pelvic parameters, we analyzed
EOS imaging of the patients to determine pelvic incidence, sacral slope,
sacral tilt, pelvic tilt, anterior pelvic plane inclination and pelvic axial
rotation. Additionally, anteversion and inclination of the acetabular cup
position were determined. RESULTS:
No statistically significant difference was found between the preoperative
and postoperative measurements of pelvic parameters, although the change in
pelvic tilt approached significance. Postoperatively, respective average
values of 42.6° and 22.7° were measured for inclination and
anteversion of the acetabular cup position. CONCLUSION:
THA did not influence pelvic position and sagittal alignment in patients
with normal preoperative pelvic parameters. A subsequent study will
investigate whether corrections of pelvic parameters outside the norm in
patients with OA are possible with THA.
Keywords: Sagittal alignment, total hip arthroplasty, lumbar spine, pelvic parameters, hip osteoarthritis
