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Rheumatology Advance Access published online on October 29, 2003
Rheumatology, doi:10.1093/rheumatology/keh036
Rheumatology © British Society for Rheumatology 2003; all rights reserved
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© 2003 Rheumatology © British Society for Rheumatology 2003; all rights reserved

Original Papers

Can ultrasound predict histological findings in regenerated cartilage?

K. Hattori 1*, Y. Takakura 1, Y. Morita 2, M. Takenaka 2, K. Uematsu 1, and K. Ikeuchi 2

1 Department of Orthopaedic Surgery, Nara Medical University, 840, Shijyo-cho, Kashihara, Nara, 634-8522, Japan
2 Institute for Frontier Medical Sciences, Kyoto University, 53 Shogoin Kawahara-cho, Kyoto, 606-8397, Japan

* Corresponding author. E-mail: hattori{at}naramed-u.ac.jp.

Received 12 May 2003 ; accepted 19 August 2003

Abstract

Objective. To evaluate regenerated articular cartilage quantitatively by introducing an ultrasonic probe into the knee joint under arthroscopy and analysing the A-mode echogram by means of wavelet transformation.

Methods. Three experimental rabbit models (spontaneous repair model, large cartilage defect model, treatment model) were examined using our ultrasonic evaluation system and a histological grading scale. From resulting wavelet map, the percentage of maximum magnitude was selected as the quantitative index of the ultrasonic evaluation system.

Results. The percentage maximum magnitude in the spontaneous repair model was 61.1%, that in the large defect model was 29.8% and that in the treatment model was 36.3%. There was modest correlation between the percentage maximum magnitude and the histological grading scale (r = -0.594)

Conclusion. Our findings indicate that ultrasound analysis can predict the microstructure of regenerated cartilage.


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K. Hattori, Y. Takakura, H. Ohgushi, T. Habata, K. Uematsu, M. Takenaka, and K. Ikeuchi
Which cartilage is regenerated, hyaline cartilage or fibrocartilage? Non-invasive ultrasonic evaluation of tissue-engineered cartilage
Rheumatology, September 1, 2004; 43(9): 1106 - 1108.
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