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Related Experiment Video

Updated: Dec 2, 2025

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
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Total Hip Arthroplasty Digital Templating: Size Predicting Ability and Interobserver Variability.

Veronica Montiel1, Santiago Troncoso1, Andrés Valentí-Azcárate1

  • 1Department of Orthopedic Surgery and Traumatology, Clínica Universidad de Navarra, Av. Pio XII, 36, 31008 Pamplona, Navarra Spain.

Indian Journal of Orthopaedics
|November 2, 2020
PubMed
Summary

MediCad® software accurately predicts implant size for total hip arthroplasty, improving surgical planning. This digital approach enhances component sizing and anatomical restoration, showing good reliability among surgeons.

Keywords:
Digital templatingHip arthroplastyTotal hip arthroplastyTotal hip arthroplasty preoperative planning

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Area of Science:

  • Orthopedic Surgery
  • Medical Imaging Analysis
  • Surgical Planning Software

Background:

  • Total hip arthroplasty (THA) has significantly improved patient quality of life over the past century.
  • Accurate implant size selection is crucial for successful THA outcomes.
  • Preoperative templating plays a vital role in determining appropriate implant dimensions.

Purpose of the Study:

  • To evaluate the accuracy of MediCad® software in predicting implant size for total hip arthroplasty.
  • To assess the software's ability to restore hip anatomy, including vertical and horizontal offsets.

Main Methods:

  • Preoperative plans for total hip arthroplasty were created using MediCad® software on anteroposterior hip X-rays.
  • The planning process involved a junior resident, a senior resident, and three experienced hip surgeons.

Main Results:

  • MediCad® demonstrated good accuracy in predicting component size: median accuracy was 0.70 for the cup, 0.73 for the stem, and 0.28 for the neck.
  • Interobserver reliability was good (kappa > 0.4), particularly for stem measurements compared to cup measurements.
  • The digital system effectively restored vertical and horizontal offsets.

Conclusions:

  • Digital preoperative planning with MediCad® software is a reliable method for predicting component size in total hip arthroplasty.
  • The software aids in restoring native hip anatomy, contributing to successful surgical outcomes.
  • Good interobserver reliability supports the use of this digital tool in clinical practice.