| Gross | Points Awarded |
|---|---|
| Defect open; unhealed Defect unhealed, filled with fibrous tissue or unaltered graft material Defect filled with new bone; less than 25% Defect filled with new bone to 50% Defect filled with new bone 50 to 75% Defect filled with new bone 75% or more Defect completely filled; indistinguishable from surrounding bone |
0 0 5 10 15 20 25 |
|
Radiographic Defined clearly visible; unfilled Defined clearly visible; filled with clearly recognizable graft particles Defect partially filled; less than 25% Defect filled to 50% Defect filled over 50% Defect filled with new bone, with trabecular bridging and unrecognizable host-graft interface Defect indistinguishable from surrounding tissue |
0 0 5 10 15 20 25 |
|
Histomorphometry No new bone present Unaltered graft material occupied over 50% of defect Graft particles surrounded by thin rims of new bone Particles replaced by new lamellar bone with many particles still visible Over one half particles replaced with new lamellar bone; revascularization evident Dense bone trabeculae present with moderate osteogenesis; some endochondral bone formation or direct ossification Cavity filled with newly formed bone trabeculae lined with osteoblasts; bone marrow formation |
0 10 20 20 30 40 50 |
| Maximum score | 100 |