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Pelvic incidence affects postoperative dislocation rate in total hip arthropalsty patients with spinal fusion. | LitMetric

AI Article Synopsis

  • The study aimed to compare the outcomes of total hip arthroplasty (THA) with and without spinal fusion (SF) and examine dislocation risks post-surgery.
  • A total of 53 patients with SF were matched with a control group of 106 patients without SF, assessing hip function and complications using the Japanese Orthopaedic Association (JOA) hip score and radiographic measures.
  • Results indicated that patients with SF had poorer hip scores and higher dislocation rates, suggesting SF negatively impacts THA outcomes, with pelvic incidence (PI) being a potential predictor for dislocations.

Article Abstract

Purpose: The purpose of this study was to compare the clinical outcome of total hip arthroplasty (THA) with and without spinal fusion (SF), and to evaluate the radiographic characteristics of patients with dislocation after THA.

Methods: A case-controlled study of 53 patients (67 hips) who underwent both THA and SF was performed. The control group was matched to the SF group by age, gender and body mass index, and 106 patients (134 hips) were selected. Hip function was evaluated using the Japanese Orthopaedic Association (JOA) hip score. In addition, the incidence rates of postoperative complications were determined. Radiograph evaluation included lateral inclination and anteversion of the acetabular component. We also analysed sacral slope (SS), pelvic tilt (PT), and pelvic incidence (PI).

Results: The JOA hip score at final follow up was significantly poorer in the SF group compared to the control group. There were 5 cases of dislocations in the SF group and none in the control group. The anteversion of acetabular cup, PT, and PI were significantly higher in the SF group compare to the control group. In particular, the PI of patients with anterior dislocation were significantly higher compare to those of patients without dislocation.

Conclusions: Our study showed that SF is a risk factor for a poorer clinical outcome and postoperative dislocation of THA. In addition, the abnormal value of PI may be a risk factor to predict dislocation after THA with SF.

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Source
http://dx.doi.org/10.1177/11207000211054332DOI Listing

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