Experimental Investigations on Microcracks in Vibrational and Conventional Drilling of Cortical Bone

Table 1

The mean temperature (°C) of drill hole and the 𝑃 value for every group.

Drilling parameters	Conventional drilling	Vibrational drilling
		𝐴 = 100 μm; 𝑓 = 10 Hz	𝐴 = 200 μm; 𝑓 = 10 Hz	𝐴 = 300 μm; 𝑓 = 15 Hz	𝐴 = 500 μm; 𝑓 = 15 Hz	𝐴 = 500 μm; 𝑓 = 20 Hz
Mean temperature of drill hole ± SD	55.41 ± 4.60	42.87 ± 2.00	40.33 ± 2.60	39.47 ± 1.69	37.88 ± 1.67	36.38 ± 1.32
𝑃 value		0.0087	0.0001	<0.0001	<0.0001	<0.0001

SD: standard deviation.