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 |