Enhancing the Reliability of Cartilage Repair Evaluation: A Simplified Volume-Based Approach

Area of Science:

• Orthopedics
• Regenerative Medicine
• Biomaterials

Background:

• Arthroscopic evaluation of cartilage repair is crucial for treatment assessment.
• Current scoring methods, such as the International Cartilage Repair Society (ICRS) score, may have limitations in reliability.
• Enhancing the consistency of cartilage repair assessments is vital for clinical and research progress.

Purpose of the Study:

• To develop and evaluate a novel volume-based scoring technique for arthroscopic cartilage repair.
• To compare the reliability of this new technique against the established ICRS score.
• To assess the correlation of the volume-based score with histological outcomes.

Main Methods:

• A porcine cartilage repair model was utilized, with defects treated using a collagen/polylactide scaffold or left to heal spontaneously.
• Inter- and intrarater reliability of the volume-based scoring technique were assessed using intraclass correlation coefficients (ICCs).
• External validation was performed by comparing the volume-based score with histological ICRS II results.

Main Results:

• The volume-based score demonstrated moderate to good interrater reliability (ICC 0.67-0.78) and intrarater reliability (ICC 0.58-0.84).
• The new technique showed superior consistency compared to the ICRS score.
• Moderate positive correlations were found between the volume-based score and histological ICRS II subscores (r_s = 0.62-0.64, p < 0.001).

Conclusions:

• The volume-based approach offers improved reliability for arthroscopic cartilage repair assessment.
• This technique aligns well with histological evaluations, suggesting its clinical utility.
• Further refinement may be needed to balance reproducibility with comprehensive tissue assessment.