Macroscopic cartilage repair scoring of defect fill, integration and total points correlate with corresponding items in histological scoring systems – a study in adult sheep

L. Goebel, P. Orth, M. Cucchiarini, D. Pape, H. Madry*

*Corresponding author for this work

    Research output: Contribution to journalArticleResearchpeer-review

    12 Citations (Scopus)

    Abstract

    Objective To correlate osteochondral repair assessed by validated macroscopic scoring systems with established semiquantitative histological analyses in an ovine model and to test the hypothesis that important macroscopic individual categories correlate with their corresponding histological counterparts. Methods In the weight-bearing portion of medial femoral condyles (n = 38) of 19 female adult Merino sheep (age 2–4 years; weight 70 ± 20 kg) full-thickness chondral defects were created (size 4 × 8 mm; International Cartilage Repair Society (ICRS) grade 3C) and treated with Pridie drilling. After sacrifice, 1520 blinded macroscopic observations from three observers at 2–3 time points including five different macroscopic scoring systems demonstrating all grades of cartilage repair where correlated with corresponding categories from 418 blinded histological sections. Results Categories “defect fill” and “total points” of different macroscopic scoring systems correlated well with their histological counterparts from the Wakitani and Sellers scores (all P ≤ 0.001). “Integration” was assessed in both histological scoring systems and in the macroscopic ICRS, Oswestry and Jung scores. Here, a significant relationship always existed (0.020 ≤ P ≤ 0.049), except for Wakitani and Oswestry (P = 0.054). No relationship was observed for the “surface” between histology and macroscopy (all P > 0.05). Conclusions Major individual morphological categories “defect fill” and “integration”, and “total points” of macroscopic scoring systems correlate with their corresponding categories in elementary and complex histological scoring systems. Thus, macroscopy allows to precisely predict key histological aspects of articular cartilage repair, underlining the specific value of macroscopic scoring for examining cartilage repair.

    Original languageEnglish
    Pages (from-to)581-588
    Number of pages8
    JournalOsteoarthritis and Cartilage
    Volume25
    Issue number4
    DOIs
    Publication statusPublished - 1 Apr 2017

    Keywords

    • Cartilage repair
    • Correlation
    • Histological analysis
    • Macroscopy
    • Osteochondral unit
    • Sheep

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