Sir,- I happen to agree with E. Harrison (BDJ 2003, 195: 360. Overbrushing is not the problem. In my view the problem, I believe, is 'overpaste-ing' (too much toothpaste on the brush with abrasive dentifrices on the market today). Place too much paste on the brush and add force with hand pressure and you will get worn cervical and other areas. Night time bruxism and lateral jaw movements may also cause defects in these areas -abfaction.
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Patterson, N. Overbrushing. Br Dent J 195, 483 (2003). https://doi.org/10.1038/sj.bdj.4810681
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DOI: https://doi.org/10.1038/sj.bdj.4810681