To investigate the elasticity loss of toothbrush according to the strength of pressure, the shape of brushing plane and the duration of use, thirty toothbrushes of five models were used for this examination among the toothbrushes for adults which have been marketed in the Republic of Korea. After 200 g/㎠, 300g/㎠, or 400 g/㎠ for 1, 2 or 3 month were loaded on toothbrushes, in rolling method the effect of the duration and strength of pressure and the change of the shape of brushing plane on the elasticity loss of toothbrushes was determined using Toothbrush Stroke Tester®(CHUMDAN SYSTEM, Korea).
The results are as follows;
1. The elasticity loss of toothbrushes according to 200, 300, or 400 g/㎠ pressure was 11.11%, 25.21%, 30.84%, respectively. The elasticity loss of toothbrushes was increased with increasing the strength of the pressure(p<0.001).
2. The elasticity loss of the toothbrushes according to 1, 2, or 3 months of the duration of use was in 15.60%, 22.09%, 29.47%, respectively. The elasticity loss of the toothbrushes was increased with increasing the duration of the pressure(p<0.001).
3. The elasticity loss of toothbrushes of convex plane according to 1, 2 or 3 months of the durate of use was 10.36%, 18.29% and 24.20%, respectively, that of toothbrushes of flat brushing plane according to 1, 2 or 3 months of the duration was 20.88%, 25.87%, 34.74%, respectively. The elasticity loss of the toothbrushes of flat brushing plane was higher than that of convex brushing plane(p<0.05).
These results show that the property of the KS is optimal according to the pressure of toothbrushing, the shape of toothbrushes and the duration of toothbrushes using must be checked, and the further studies are needed about that.
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