Femoral neck preservation with a short hip stem produced with powder manufacturing: mid-term results of a consecutive case series

  • Marco SchiraldiEmail author
  • Manuel Bondi
  • Lodovico Renzi Brivio
Original Article • HIP - ARTHROPLASTY


Stress shielding and thigh pain are not uncommon after cementless total hip arthroplasty (THA) using conventional hip stems. It has been postulated that short, neck-preserving stems may overcome these disadvantages of standard stems and, hence, further improve clinical outcome. The purpose of our retrospective study was to assess the mid-term performance of a neck-preserving hip stem for which, as of yet, no clinical results have been published. A population of 146 consecutive patients who received 152 neck-preserving stems over a 1.6-year period was retrospectively reviewed. Harris Hip Score (HHS) and the Western Ontario and McMasters Universities Osteoarthritis Index (WOMAC) were collected, along with radiographic data. One hundred and forty-four THAs implanted in 136 patients were available for analysis. After a mean follow-up of 56 months, mean HHS and WOMAC improved significantly versus preoperative values. Aseptic loosening was not observed. Five-year survival with revision of any component for any reason as the endpoint was 99.3% (95% confidence interval, 95.2–99.9%). Excellent mid-term clinical and radiographic outcomes were observed with the study device. We attribute this to the metaphyseal fit in combination with retention of the femoral neck. However, our findings need to be confirmed by multicentre studies with larger patient samples.


Clinical outcome Minimally invasive surgery Neck preservation Osteoarthritis Total hip arthroplasty 



Funding for manuscript development was provided by Adler Ortho, Cormano, Italy. The sponsor had no involvement in the writing of the report or in the decision to submit the results for publication.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

Ethics committee approval was obtained prior to study commencement.

Informed consent

Informed consent was obtained from all individual participants included in the study.


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Copyright information

© Springer-Verlag France SAS, part of Springer Nature 2019

Authors and Affiliations

  • Marco Schiraldi
    • 1
    Email author
  • Manuel Bondi
    • 2
  • Lodovico Renzi Brivio
    • 2
  1. 1.Azienda Ospedaliera Nazionale AlessandriaAlessandriaItaly
  2. 2.Azienda Ospedaliera Carlo PomaMantuaItaly

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