Clinical Rheumatology

, Volume 29, Issue 6, pp 637–643

Radiographic measurements in the evaluation and classification of elbow joint destruction in patients with rheumatoid arthritis

Authors

  • Kenzo Hashizume
    • Department of Orthopaedic SurgeryOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
    • Department of Orthopaedic SurgeryOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
    • Department of Human MorphologyOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
  • Kazuo Fujiwara
    • Department of Orthopaedic SurgeryOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
    • Department of Medical Materials for Musculoskeletal ReconstructionOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
  • Yasutaka Kadota
    • Department of Orthopaedic SurgeryOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
  • Ryuichi Nakahara
    • Department of Orthopaedic SurgeryOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
  • Kazuhiko Ezawa
    • Kurashiki Kosai Hospital
  • Hajime Inoue
    • Kagawa Rosai Hospital
  • Toshifumi Ozaki
    • Department of Orthopaedic SurgeryOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Original Article

DOI: 10.1007/s10067-010-1381-y

Cite this article as:
Hashizume, K., Nishida, K., Fujiwara, K. et al. Clin Rheumatol (2010) 29: 637. doi:10.1007/s10067-010-1381-y

Abstract

We developed two new radiographic parameters—the humeral surface height ratio and ulnar surface height ratio—to precisely detect changes in the bony structure of rheumatoid elbows. Of the 59 patients with rheumatoid arthritis, 101 elbows were classified into four types (osteoarthritis, ankylosis, erosive, and resorptive) according to the radiographic appearance. Clinically, osteoarthritis type and ankylosis type were considered to be stable form, and erosive type and resorptive type were unstable form. Patients' clinical data and yearly radiographic changes in the bony structure evaluated by the humeral surface height ratio and ulnar surface height ratio were compared among the four types and between the two forms. There were significant differences between the two forms and among the three types except for the ankylosis type in yearly radiographic changes in the bony structure evaluated by the humeral surface height ratio and ulnar surface height ratio. Stable and unstable forms were distinguished by a cut-off point of 0.65 and 2.58 in yearly radiographic changes in the bony structure evaluated by the humeral surface height ratio and the ulnar surface height ratio, respectively. These parameters might be useful for monitoring the structural changes of the elbow joint in rheumatoid arthritis.

Keywords

Elbow jointJoint destruction patternRadiographic parameterRheumatoid arthritis

Copyright information

© Clinical Rheumatology 2010