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tootbrush useful life

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trans09 | 04:14 Fri 11th Nov 2005 | Science
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For how long has a brush been in use that would reduce its plaque removing ability up to 30 per cent than new one?

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if the toothbrusher was perched upon a reversing cow for the duration of the experiment, from when toothbrush was new, then it would be an additional 30% more rubbish, making it 39% less effective than a new toothbrush on a non-reversing-cow platform. so about a month i'd say.

Is that a calender month, lunar month or Euro month, bigveg?


It also depends on the size of the removal van the plaque are driving.

lunar. definitely.


interesting point about the vans. adds another layer of complexity

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