Advertisement

New cross-table lateral radiography method for measuring acetabular component anteversion in total hip arthroplasty: a prospective study of 93 primary THA

New cross-table lateral radiography method for measuring acetabular component anteversion in total hip arthroplasty: a prospective study of 93 primary THA

Hip Int 2017; 27(3): 293 - 298

Article Type: ORIGINAL RESEARCH ARTICLE

DOI:10.5301/hipint.5000456

Authors

Hajime Seo, Masatoshi Naito, Yoshinari Nakamura, Koichi Kinoshita, Tomohiro Nomura, So Minokawa, Tomohiko Minamikawa, Takuaki Yamamoto

Abstract

Introduction

Various methods have been described for measuring acetabular component anteversion. However, accurate measurement of anteversion is difficult. We herein propose a new method using cross-table lateral (CL) radiography performed with the contralateral hip flexed to 45° (45° flexed CL radiography). The main purpose of this study was to evaluate the reliability and validity of this new method.

Methods

The study group included 93 patients who underwent total hip arthroplasty (THA). All hips were evaluated with computed tomography (CT) and both standard and 45° flexed CL radiographs to measure acetabular component anteversion the week after THA. The intraobserver and interobserver reliability of each measurement was assessed. Plain radiography measurements were compared with reference CT measurements to evaluate their validity.

Results

All measurements had excellent intraobserver and interobserver reliability, and plain radiography measurements correlated well with CT measurements. The mean measurements were 21.9° (3°-39°) with CT, 24.9° (7°-47°; p<0.001) with standard CL radiographs, and 22.5° (7°-43°; p = 0.112) with 45° flexed CL radiographs.

Discussion

The anteversion values measured with our new method were closer to the CT values used as a reference standard than those with standard CL radiographs. Our new method appears to be reliable and valid for measuring acetabular component anteversion.

Article History

Disclosures

Financial support: None.
Conflict of interest: None.

This article is available as full text PDF.

  • If you are a Subscriber, please log in now.

  • Article price: Eur 36,00
  • You will be granted access to the article for 72 hours and you will be able to download any format (PDF or ePUB). The article will be available in your login area under "My PayPerView". You will need to register a new account (unless you already own an account with this journal), and you will be guided through our online shop. Online purchases are paid by Credit Card through PayPal.
  • If you are not a Subscriber you may:
  • Subscribe to this journal
  • Unlimited access to all our archives, 24 hour a day, every day of the week.

Authors

Affiliations

  •  Department of Orthopaedic Surgery, Fukuoka University Faculty of Medicine, Nanakuma, Fukuoka - Japan
  •  Department of Orthopaedic Surgery, Fukuoka Sanno Hospital, Momochihama, Fukuoka - Japan
  •  Department of Orthopaedic Surgery, Iida Hospital, Miyakonojo, Miyazaki - Japan
  •  Department of Orthopaedic Surgery, Fukuoka University Chikushi Hospital, Chikushino, Fukuoka - Japan

Article usage statistics

The blue line displays unique views in the time frame indicated.
The yellow line displays unique downloads.
Views and downloads are counted only once per session.

No supplementary material is available for this article.