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Updated: Jul 22, 2026

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

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A Multi-factor Analysis of Revision in Total Hip Replacement Using the Collarless-Polished-Tapered Stems with

Yu Hong1, Linda Johnston1, Weijie Wang1

  • 1University Department of Orthopaedic and Trauma Surgery, Ninewells Hospital and Medical School, TORT Centre, University of Dundee, Dundee, UK.

Orthopaedic Surgery
|June 29, 2023
PubMed

Insights

The Trilogy cup demonstrates superior survival rates when used with collarless-polished-tapered (CPT) stems in total hip replacement (THR), outperforming Continuum and ZCA cups in revision cases.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Clinical Outcomes Research

Background:

  • Collarless-polished-tapered (CPT) stems are commonly used in total hip replacement (THR).
  • The optimal acetabular cup for use with CPT stems remains unclear.
  • This study evaluates the performance of different cup types with CPT stems.

Purpose of the Study:

  • To compare the revision and survival rates of three commonly used acetabular cups (ZCA All-poly, Continuum, Trilogy) when paired with CPT stems in THR.
  • To identify the best-performing cup for use with CPT stems.

Main Methods:

  • A cohort study analyzed data from 5981 THR patients (1998-2021) in the UK.
  • Data included patient demographics, surgical details, cup type, survival life, and Harris Hip Scores (HHS).
  • Statistical analysis involved chi-square tests, ANOVA, and survival analysis using SPSS software.

Main Results:

  • The Continuum cup showed the highest post-operative Harris Hip Scores at 1 and 5 years.
  • The Trilogy cup demonstrated the best survival rates and lowest revision rates.
  • The ZCA cup had the lowest Harris Hip Scores and poorer survival outcomes compared to Trilogy and Continuum.

Conclusions:

  • The Trilogy acetabular cup is recommended for use with CPT stems due to its superior survival trends and lower revision rates.
  • While the Continuum cup offered better short-term functional outcomes (HHS), the Trilogy cup provides better long-term implant survivorship.
Abstract

Keywords:
Implant combinationMulti-factorsRevisionThe CPT implantThe Trilogy implantTotal hip replacement

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