Duration of drilling with type of burr

Presence of hearing loss as assessed by PTA

n (%)

Mean drill time (min)

p value

Total

No

Yes

32 (55%)

26 (45%)

48.69

61.11

0.153

Not significant

Diamond

No

Yes

32 (55%)

26 (45%)

17.70

20.55

0.915

Not significant

Cutting

No

Yes

32 (55%)

26 (45%)

30.99

40.57

0.047

Significant