Research Article
A Laboratory Based Investigation of a New Elastic Toothbrush Head
Table 2
% PI for type of toothbrush for the 14 casts
% PI data
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| | 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 observation | 37.21 (20.56) | 25.29 (14.93) | 34.14 (18.38) | 19.93 (11.59) | | 2nd observation | 37.50 (18.64) | 28.00 (15.88) | 33.79 (17.29) | 20.50 (10.78) | | Total | 37.36 (19.26) | 26.6 (15.19) | 33.96 (17.51) | 20.21 (10.98) |
| | GLM for repeated measures | Measures = 3.96 = 0.06 | | Toothbrush = 2.61 = 0.12 |
| | Mean difference of PI between devices | 11% | 14% | | 95% CI of the difference | −3%–24% | 2%–25% |
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