A new technique for radiographic measurement of acetabular cup orientation

Brian Derbyshire, Peter J. Diggle, Christopher J. Ingham, Rory Macnair, James Wimhurst, Henry Wynn Jones

Research output: Contribution to journalArticlepeer-review

Abstract

Accurate radiographic measurement of acetabular cup orientation is required in order to assess susceptibility to impingement, dislocation, and edge loading wear. In this study, the accuracy and precision of a new radiographic cup orientation measurement system were assessed and compared to those of two commercially available systems. Two types of resurfacing hip prostheses and an uncemented prosthesis were assessed. Radiographic images of each prosthesis were created with the cup set at different, known angles of version and inclination in a measurement jig. The new system was the most accurate and precise and could repeatedly measure version and inclination to within a fraction of a degree. In addition it has a facility to distinguish cup retroversion from anteversion on anteroposterior radiographs.

Original languageEnglish (US)
Pages (from-to)369-372
Number of pages4
JournalJournal of Arthroplasty
Volume29
Issue number2
DOIs
StatePublished - Feb 2014
Externally publishedYes

Keywords

  • Acetabular cup
  • Cup inclination
  • Cup orientation
  • Cup version
  • Radiographic measurement

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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