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Fig. 2 | Journal of Orthopaedic Surgery and Research

Fig. 2

From: Instruments for reproducible setting of defects in cartilage and harvesting of osteochondral plugs for standardisation of preclinical tests for articular cartilage regeneration

Fig. 2

Calibration of the crown mill. The crown mill needs to be calibrated before adjusting the desired depth. In the above picture, the pegs of the centralizer of the crown mill are placed in a 0.5-mm cavity of the calibration tool providing various cavities with different depths. The starting point is reached by gently turning the cutting blades until the black mark is touched. The depth of calibration represents the expected depth of penetration of the pegs into the cartilage tissue under pressure. This is necessary as the penetration depth has to be considered when the final depth of the defect is adjusted

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