Table 2.
Experimental design
| Part 1: Dentin abrasivity | |||||
|---|---|---|---|---|---|
| 72 dentin samples from 12 bovine roots | |||||
| Recording of baseline profiles | |||||
| Dividing into 6 groups. Samples in each group were derived from 12 different roots | |||||
| Group 1 n = 12 |
Group 2 n = 12 |
Group 3 n = 12 |
Group 4 n = 12 |
Group 5 n = 12 |
Group 6 n = 12 |
| Brushing sequence (26 min; 1.6 N, 120 strokes/min, slurry 1:2, fresh slurry every 2 min) | |||||
| Elmex Kariesschutz | Lavera Neutral Zahngel | Curaprox Black is White | Swiss Smile Diamond Glow | Ringana Fresh Tooth Oil | Artificial saliva |
| Recording of final profiles | |||||
| Calculating the resulting abrasive dentin wear | |||||
| Part 2: Cleaning efficacy | |||||
| 60 dentin samples from 60 human roots | |||||
| Random dividing into 6 groups | |||||
| Group 1 n = 10 |
Group 2 n = 10 |
Group 3 n = 10 |
Group 4 n = 10 |
Group 5 n = 10 |
Group 6 n = 10 |
| Staining the samples with black tea modified with citric acid (17 h, 37°C, pH 4) | |||||
| Baseline digital images under Tessovar 5X | |||||
| Brushing sequence (26 min; 1.6 N, 120 strokes/min, slurry 1:2, fresh slurry every 2 min) | |||||
| Elmex Kariesschutz | Lavera Neutral Zahngel | Curaprox Black is White | Swiss Simle Diamond Glow | Ringana Fresh Tooth Oil | Artificial saliva |
| Digital images under Tessovar | |||||
| Analysing the stain-free surfaces planimetrically and calculate them as a percentage of the total brushing area | |||||