Duration of drilling with type of burr

DPOAE (REFER/PASS)

n (%)

Mean drill time (min)

p value

Total

PASS

REFER

16 (28%)

42 (72%)

46.70

57.14

0.194

Not significant

Diamond

PASS

REFER

16 (28%)

42 (72%)

16.84

19.79

0.243

Not significant

Cutting

PASS

REFER

16 (28%)

42 (72%)

29.87

37.35

0.205

Not significant