Table 2.

The value of some key parameters.

Properties	Values
Volume size	20 mm * 18 mm * 8 mm
Volume resolution	256 *128 * 128
Average stiffness of cancellous bone	4.0 NS/mm
Average stiffness of compact bone	1.0 Ns/mm
Update rates	>1,000 Hz
Average drilling speed of sphere burs	2.0 mm/ms
Maximum drilling stiffness of round burs	5.0 Ns/mm
Average drilling pilot drills	1.0 mm/ms
Maximum drilling stiffness of pilot drills	5.0 Ns/mm
Average drilling speed of twist drills	0.7 mm/ms
Maximum drilling stiffness of twist drills	2.0 Ns/mm