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Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
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A proposal for the study of cementless short-stem hip prostheses
F Gómez-García1, M Fernández-Fairen2, R L Espinosa-Mendoza3
1La Salle University at the Angeles Mocel Hospital, Mexico City.
Acta Ortopedica Mexicana
|March 8, 2017
Summary
New short stem hip implants lack clear classification. This study defines short stems and proposes a new nomenclature to categorize the 44 identified models, aiding outcome analysis.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Implant Design
Background:
- Recent advancements in hip arthroplasty have introduced novel short stem designs.
- Lack of a standardized definition and classification for short stems hinders outcome analysis.
Purpose of the Study:
- To review the current state of cementless short stem hip implants.
- To establish a clear definition and propose a classification system for short stems.
- To group implants into families using a descriptive nomenclature.
Main Methods:
- Comprehensive literature search of PubMed and Scopus databases.
- Consultation with implant manufacturers, research foundations, and expert organizations.
- Classification of identified short stems using a newly developed nomenclature system.
Main Results:
- Identified 44 distinct short stem models with 84 design variables from 20 manufacturers.
- Defined short stems as implants occupying the proximal femur (neck, metaphysis, and proximal metaphyseal-diaphyseal junction).
- Grouped the diverse models into three types and 16 generic families based on the new nomenclature.
Conclusions:
- A wide variety of short stem designs exist, necessitating a standardized classification.
- The proposed nomenclature provides an unequivocal and distinctive method for describing short stems.
- This classification framework is crucial for consistent analysis and comparison of short stem hip arthroplasty outcomes.
