A novel method to measure femoral component migration by computed tomography: a cadaver study. Academic Article uri icon

Overview

abstract

  • INTRODUCTION: Radiostereometric analysis (RSA) is the most accurate technique to measure implant migration. However, it requires special equipment, technical expertise and analysis software and has not gained wide acceptance. The current paper analyzes a novel method to measure implant migration utilizing widely available computer tomography (CT). METHODS: Three uncemented total hip replacements were performed in three human cadavers and six tantalum beads were inserted into the femoral bone similar to RSA. Six different 28 mm heads (-3, 0, 2.5, 5.0, 7.5 and 10 mm) were added to simulate five reproducible translations (maximum total point migration) of the center of the head. Implant migration was measured in a 3-D analysis software (Geomagic Studio 7). Repeat manual reconstructions of the center of the head were performed by two investigators to determine repeatability and accuracy. RESULTS: The accuracy of measurements between the centers of two head sizes was 0.11 mm with a CI 95 % of 0.22 mm. The intra-observer repeatability was 0.13 mm (CI 95 % 0.25 mm). The interrater-reliability was 0.943. CONCLUSION: CT based measurement of head displacement in a cadaver model were highly accurate and reproducible.

publication date

  • March 16, 2016

Research

keywords

  • Arthroplasty, Replacement, Hip
  • Femur
  • Foreign-Body Migration
  • Hip Prosthesis

Identity

Scopus Document Identifier

  • 84961197194

Digital Object Identifier (DOI)

  • 10.1007/s00402-016-2442-8

PubMed ID

  • 26983723

Additional Document Info

volume

  • 136

issue

  • 6