Table 7 At fixed speed, average amount of aerosol produced under different air-water ratios at 0 ° and 180 ° was compared
Distance | Position | Handpiece speed | Air-water coolant | Av. Aerosol | p-Value |
|---|---|---|---|---|---|
30 cm | 180° | 10,000 rpm | 20% water 30% water 40% water | 25.5 39.5 91.7 | 0.036 |
20,000 rpm | 20% water 30% water 40% water | 38.2 64.9 87.9 | 0.425 | ||
30,000 rpm | 20% water 30% water 40% water | 58.6 71.3 169.1 | 0.035 | ||
40,000 rpm | 20% water 30% water 40% water | 43.0 214.0 118.0 | 0.040 | ||
0° | 10,000 rpm | 20% water 30% water 40% water | 8.9 - - | 0.024 | |
20,000 rpm | 20% water 30% water 40% water | 14 10.2 22.9 | 0.173 | ||
30,000 rpm | 20% water 30% water 40% water | 15.3 8.9 136.2 | 0.243 | ||
40,000 rpm | 20% water 30% water 40% water | 19 14 152 | 0.191i |