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Related Experiment Video

Updated: Jul 6, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
09:31

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty

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The anatomically difficult primary total hip replacement: medium- to long-term results using a cementless odular

L C Biant1, W J M Bruce, J B Assini

  • 1The Royal National Orthopaedic Hospital, Brockley Hill, Stanmore, Middlesex HA7 4LP, UK. lcbiant@yahoo.com

The Journal of Bone and Joint Surgery. British Volume
|April 2, 2008
PubMed
Summary

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This study shows the S-ROM cementless femoral component provides excellent long-term results for total hip replacement in patients with anatomical abnormalities. Ten-year follow-up demonstrates sustained clinical improvement and good radiological outcomes.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Radiology

Background:

  • Total hip replacement (THR) is a common procedure, but challenging in patients with anatomical abnormalities.
  • Cementless modular femoral components offer potential solutions for complex cases.
  • The S-ROM component is designed for versatility in challenging primary THR procedures.

Purpose of the Study:

  • To evaluate the ten-year clinical and radiological outcomes of the S-ROM cementless modular femoral component in primary total hip replacement.
  • To assess the component's performance in patients with significant anatomical abnormalities.
  • To determine the long-term survivorship and complication rates.

Main Methods:

  • Prospective study of 55 primary total hip replacements using the S-ROM cementless modular femoral component.

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  • Patients had significant anatomical abnormalities making primary THR difficult.
  • Clinical outcomes assessed using Harris hip score, WOMAC, and SF-12 scores.
  • Radiological evaluation for component loosening and osteolysis.

    • Main Results:

    • Excellent mean Harris hip scores at five (83) and ten (85) years post-surgery.
    • Stable SF-12 and WOMAC scores at ten-year follow-up.
    • No femoral component loosening or revision; minimal osteolysis observed in specific Gruen zones (1 and 7).
    • Low rates of acetabular revision (3) and liner exchange (2).

    Conclusions:

    • The S-ROM cementless modular femoral component demonstrates excellent long-term clinical and radiological results for primary total hip replacement in anatomically challenging cases.
    • The component shows good survivorship and a low complication profile at a mean ten-year follow-up.
    • This implant is a viable option for complex primary total hip arthroplasty requiring a cementless modular femoral stem.