Table 1 Correspondence of the score (0–3) for the histological findings for each parameter considered during semiquantitative histopathological evaluation.
Grade | Surrounding Cavities | Macrophages Mesenchymal Cells | Osteoblasts | Osteoclasts | Fibrous Tissue | Cartilage |
|---|---|---|---|---|---|---|
0 | None | None | None | None | None | None |
1 | Occupying less than 25% of the bone surrounding the drill hole | One or two cells per field of view within the drill hole | Less than 25% of the field of view within the drill hole occupied by cavities lined with osteoblasts | One or two osteoclasts per field of view within the drill hole | Less than 25% of the drill hole occupied by fibrous tissue | Less than 25% of the drill hole occupied by cartilage |
2 | Occupying up to 50% of the bone surrounding the drill hole | Up to five cells per field of view within the drill hole | Up to the 50 % of the field of view occupied by cavities lined with osteoblasts | Up to five osteoclasts per field of view within the drill hole | Up to 50% of the drill hole occupied by fibrous tissue | Up to 50% of the drill hole occupied by cartilage |
3 | Occupying more than 50% of the bone surrounding the drill hole | More than five cells per field of view within the drill hole | More than 50% of the field of view occupied by cavities lined with osteoblasts | More than five osteoclasts per field of view within the drill hole | More than 50% of the drill hole occupied by fibrous tissue | More than 50% of the drill hole occupied by cartilage |