Kinematic and kinetic modifications in walking pattern of hip osteoarthritis patients induced by intra-articular injections of hyaluronic acid

Marco Paoloni, Luca Di Sante, Mauro Dimaggio, Andrea Bernetti, Massimiliano Mangone, Sara Di Renzo, Valter Santilli

Research output: Contribution to journalArticlepeer-review

Abstract

Background: A growing body of evidence points to the efficacy of intra-articular injections of hyaluronic acid, in dealing with pain and function in hip osteoarthritis. To date, however, no data exist as to this treatment's effect on walking pattern. Methods: We performed a prospective, open study in order to verify, in a group of 20 hip osteoarthritis patients (12 men, 8 women, mean age 60.5, range 47-73), the clinical effects of 3 intra-articular injections of 2 ml of hyaluronic acid in the hip (1/week) in terms of pain and function at 1 (T1), 3 (T2) and 6-month (T3) follow-ups, as well as changes in the kinematics and kinetics of gait at 6-month follow-up. Findings: Pain as measured with visual analog scale significantly dropped after this procedure (P <0.0001). A significant improvement was noted regarding stiffness (P = 0.005) and disability (P = 0.04), as measured by the Western Ontario and McMaster Universities osteoarthritis index. As regards gait analysis, patients at T3 walked with higher cadence (P = 0.004) and stride length (P = 0.02) compared to T0. Moreover, a significant increase for the pelvic tilt at heel contact (P = 0.0004) and for hip flexion-extension moment at loading response sub-phases of gait cycle (P = 0.02) was noted at T3. Interpretation: In line with current literature, our patients display clinical improvement 6 months after intra-articular injections of hyaluronic acid, accompanied by changes in walking pattern, as measured by instrumental gait analysis. The kinematic and kinetic changes observed may be the consequence of the therapeutic effect of intra-articular injections of hyaluronic acid.

Original languageEnglish
Pages (from-to)661-665
Number of pages5
JournalClinical Biomechanics
Volume27
Issue number7
DOIs
Publication statusPublished - Aug 2012

Keywords

  • Gait analysis
  • Hip osteoarthritis
  • Kinematic
  • Kinetic
  • Viscosupplementation

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Biophysics

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