Table 1 Histological scoring system used to grade bone healing
Score | Bone defect coverage | New bone type | Vascularisation | Inflammation |
|---|---|---|---|---|
Percentage of defect bridged by bone | Nature of new bone within defect | Presence of vascularisation within newly formed bone | Presence of inflammatory cells around newly formed bone | |
0 | 0% | No new bone | No evidence of neovascularisation | Abundant inflammation and evidence of encapsulation |
1 | 1-24% | Predominantly woven | Few new vessels (<10) | Relatively few (10-50) inflammatory cells present |
2 | 25-49% | Predominantly lamella remodelled | Abundant neovascularisation | No evidence of inflammatory cell presence |
3 | 50-74% | - | - | - |
4 | 75-100% | - | - | - |