The effects of modified hardinge approach on hip muscle strength in patients with primary hip arthroplasty: a patient evaluation with isokinetic strength test and gait analyses

Çakmak M. F., Bayram S., Birişik F., Ayik Ö., ŞAHİNKAYA T., ERGİN Ö. N., ...More

European Journal of Orthopaedic Surgery and Traumatology, vol.34, no.2, pp.1209-1218, 2024 (ESCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 2
  • Publication Date: 2024
  • Doi Number: 10.1007/s00590-023-03778-6
  • Journal Name: European Journal of Orthopaedic Surgery and Traumatology
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, Academic Search Premier, CINAHL, EMBASE, MEDLINE
  • Page Numbers: pp.1209-1218
  • Keywords: Gait analyses, Hip arthroplasty, Hip osteoarthrosis, Isokinetic muscle strength, Modified hardinge approach
  • Istanbul University Affiliated: Yes


Objective: Numerous factors affect abductor strength after Total hip arthroplasty (THA), including surgical technique, prosthesis type, postoperative rehabilitation program, and preoperative patient condition. We prospectively investigated the effects of the modified Hardinge approach on hip muscle strength, which was evaluated using the isokinetic test, functional results, and gait function of patients who underwent primary THA. Methods: The hip muscles strength were measured using an isokinetic dynamometer. The primary outcomes of the present study were measurement of isokinetic strength of hip abductor muscle strengths using an isokinetic evaluator and gait analyses preoperatively and at 6 months postoperatively in 27 patients. Results: Isokinetic muscle strength test, abductor and other hip circumference groups achieved the preoperative muscle strength at 3 months postoperatively, and the postoperative sixth month values showed a statistically significant improvement compared with the preoperative and third month values. In gait analyze, our temporospatial data showed a slight regression at postoperative 3 months but reached the same values at 6 months postoperatively. Kinematic data showed a significant regression, but the data were not compared with those in the preoperative period. Conclusions: Adequate muscle strength and physiological gait pattern, similar to the preoperative status, can be achieved at 6 months postoperatively. Level of evidence: Level III.