%0 Journal Article
%T Greater early migration of a short-stem total hip arthroplasty is not associated with an increased risk of osseointegration failure: 5th-year results from a prospective RSA study with 39 patients, a follow-up study
%A Christof HurSchler
%A Gabriela v. Lewinski
%A Henning Windhagen
%A Michael Schwarze
%A Stefan Budde
%A Thilo Floerkemeier
%J Acta Orthopaedica
%D 2020
%R https://doi.org/10.1080/17453674.2020.1732749
%X Background and purpose ¡ª Short-stem hip arthroplasty has been a viable alternative to standard stems for the treatment of hip osteoarthritis for over 10 years. This study assessed whether a correlation existed between a greater initial increase in implant migration and inferior clinical outcomes at 5 years postoperatively. Results on these patients after 2 years have been published previously. Patients and methods ¡ª Radiostereometry and clinical scoring were undertaken after surgery and at 3, 6, 12, and 24 months, and 5 years postoperatively. The migration and the clinical outcomes data from the patients with initial migrations at 3 months above the 75th percentile (¡Ý 75% group) were compared with those with migrations at 3 months of less than the 75th percentile (< 75% group). Results ¡ª Between 3 months and 5 years after surgery, the mean resultant implant migrations were 0.40£¿mm (SD 0.32) in the ¡Ý 75% group and 0.39£¿mm (SD 0.25) in the <£¿75% group. The mean Harris Hip Scores and SF-36 physical scores at 5 years postoperatively were 100 (SD 0.4) and 44 (SD 12), respectively, for the ¡Ý 75% group and 99 (SD£¿2) and 50 (SD 10), respectively, for the < 75% group. The differences between the patient groups were not statistically significant. Interpretation ¡ª There was no correlation between a greater initial migration and inferior clinical outcomes at 5 years postoperatively. Despite a greater initial migration, there were no risks of early aseptic loosening and inferior midterm clinical outcomes associated with a short-stem implant with a primary metaphyseal anchorage
%U https://www.tandfonline.com/doi/full/10.1080/17453674.2020.1732749