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Related Experiment Video

Updated: Jun 17, 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

Published on: February 27, 2018

[Oblong implants for revision total hip arthroplasty].

I Landor1, P Vavrík, D Jahoda

  • 1I. Ortopedická klinika 1. LF UK a FN Motol, Praha. landor@atlas.cz

Acta Chirurgiae Orthopaedicae Et Traumatologiae Cechoslovaca
|January 14, 2010
PubMed
Summary

This study found that oblong acetabular implants, particularly those with hydroxyapatite coating, offer improved survival rates for acetabular defects compared to their original models. Proper anchoring in load-bearing bone is crucial for success.

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Medical device engineering

Background:

  • Reconstructing defective acetabular bone beds is essential for successful hip implant surgery.
  • Oblong implants are an option for acetabular reconstruction, but data are limited.
  • This study compares oblong implant outcomes with their original models.

Purpose of the Study:

  • To evaluate the efficacy and survival rates of oblong acetabular implants.
  • To compare the outcomes of the Langs-Ovale Revisionspfanne (L.O.R.) with the Walter Oval cup.
  • To investigate the role of hydroxyapatite coating in implant survival.

Main Methods:

  • Comparative study of 111 patients (L.O.R.) and 134 patients (Walter Oval) undergoing acetabular revision.
  • Kaplan-Meier survival analysis and Harris Hip Score (HHS) evaluation.

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The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
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Last Updated: Jun 17, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
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Published on: February 27, 2018

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
07:45

The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report

Published on: August 4, 2022

  • Radiographic assessment for implant migration and loosening.

    • Main Results:

    • The Walter Oval group had a lower revision rate (5.3%) compared to the L.O.R. group (13.5%).
    • Aseptic loosening and deep infection were noted as causes for revision.
    • Both implant types showed significant improvement in HHS, with no radiographic differences observed.

    Conclusions:

    • Oblong implants are favorable for acetabular defects (Paprosky types IIB-IIIA).
    • Successful outcomes depend on anchoring the oblong cup in the patient's own bone.
    • Hydroxyapatite coating significantly enhances implant survival compared to the original model.