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Table 1 Histological scoring system for cartilage repair

From: Local adherent technique for transplanting mesenchymal stem cells as a potential treatment of cartilage defect

Category Points
Cell morphology  
   Hyaline cartilage 4
   Mostly hyaline cartilage 3
   Mostly fibrocartilage 2
   Mostly non-cartilage 1
   Noncartilage only 0
Matrix-staining (metachromasia)  
   Normal (compared with host adjacent cartilage) 3
   Slightly reduces 2
   Markedly reduced 1
   No metachromatic stain 0
Surface regularitya  
   Smooth (>3/4) 3
   Moderate (1/2 to 3/4) 2
   Irregular (1/4 to 1/2) 1
   Severely irregular (<1/4) 0
Thickness of cartilageb  
   2/3 to 4/3 3
   5/3 to 4/3 2
   1/3 to 2/3 or >5/3 1
   <1/3 0
Integration of donor with host adjacent cartilage  
   Both edges integrated 2
   One edge integrated 1
   Neither edge integrated 0
Total maximum 15
  1. aTotal smooth area of the reparative cartilage compared with the entire area of the cartilage defect. bAverage thickness of the reparative cartilage compared with that of the surrounding cartilage.