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Scoring criteria for bone growth within the CSD. A MIP was scored for each animal as follows: 0, no bone formation in defect; 1, few bony spicules present in the defect; 2, bony bridging present at defect borders; 3, bony bridging at a partial length of the defect; and 4, bony bridging present across the longest point of the defect. MIP, maximum intensity projection.
