Hip & pelvis

The Korean Hip Society (대한고관절학회)
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Comparison of Short Curved Stems and Standard-length Single Wedged Stems for Cementless Total Hip Arthroplasty

  • Chan Young Lee (Department of Orthopedic Surgery, Chonnam National University Medical School and Hwasun Hospital) ;
  • Sheng-Yu Jin (Department of Orthopedic Surgery, Chonnam National University Medical School and Hwasun Hospital) ;
  • Ji Hoon Choi (Department of Orthopedic Surgery, Chonnam National University Medical School and Hwasun Hospital) ;
  • Taek-Rim Yoon (Department of Orthopedic Surgery, Chonnam National University Medical School and Hwasun Hospital) ;
  • Kyung-Soon Park (Department of Orthopedic Surgery, Chonnam National University Medical School and Hwasun Hospital)
  • Received : 2023.03.16
  • Accepted : 2023.10.30
  • Published : 2024.06.01
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Abstract

Purpose: The purpose of this study was to compare the clinical and radiographic outcomes with use of short-curved stems versus standard-length single wedged stems over a minimum follow-up period of five years. Materials and Methods: A retrospective study of primary total hip arthroplasties performed using the Fitmore® stem (127 hips, 122 patients) and the M/L taper® stem (195 hips, 187 patients) between October 2012 and June 2014 was conducted. The clinical and radiographic outcomes were obtained for evaluation over a minimum follow-up period of five years. Results: In both the Fitmore® and M/L taper® groups, the mean Harris hip score improved from 52.4 and 48.9 preoperatively to 93.3 and 94.5 at the final follow-up, respectively (P=0.980). The mean Western Ontario and McMaster Universities Osteoarthritis Index scores also improved from 73.3 and 76.8 preoperatively to 22.9 and 25.6 at the final follow-up, respectively (P=0.465). Fifteen hips (Fitmore®: 14 hips; M/L taper®: one hip, P<0.001) developed intraoperative cracks and were treated simultaneously with cerclage wiring. Radiography showed a radiolucent line in 24 hips in the Fitmore® group and 12 hips in the M/L taper® group (P=0.125). Cortical hypertrophy was detected in 29 hips (Fitmore® group: 28 hips; M/L taper® group: one hip, P<0.001). Conclusion: Similarly favorable clinical and radiographic outcomes were achieved with use of both short-curved stems and standard-length single wedged stems. However, higher cortical hypertrophy and a higher rate of femoral crack were observed with use of Fitmore® stems.

Keywords

Acknowledgement

This research was supported by the best annual research grant of the Korean Hip Society 2022.

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