Research Article
A Laboratory Based Investigation of a New Elastic Toothbrush Head
Table 3
Comparison of PI between prototype and toothbrush, on the 12 casts with anomalies
% PI data
.
| | Type of brushing | Manual | Electric |
| | Type of toothbrush | Standard | Prototype | Standard | Prototype | | Mean (standard deviation) | Mean (standard deviation) | Mean (standard deviation) | Mean (standard deviation) |
| | 1st % PI observation | 42.42 (17.07) | 28.08 (14.23) | 38.83 (15.21) | 22.67 (10.07) | | 2nd % PI observation | 42.92 (13.63) | 31.42 (14.38) | 38.83 (12.61) | 22.92 (9.62) | | Total | 42.67 (15.11) | 29.75 (14.09) | 38.83 (13.66) | 22.79 (9.63) |
| | GLM for repeated measures | Measures = 5.191 = 0.03 | | Toothbrush = 4.61 = 0.04 |
| | Mean difference of PI between devices | 13% | 16% | | 95% CI of the difference | 0.4%–26% | 6%–26% |
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