Many manoeuvres with yo yos can be dangerous to teeth

doi:10.1136/bmj.318.7190.1078

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This article has a correction

Please see: Ingestion of mouthwash by children

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William Cooper, Pupil, year 6,
Elizabeth Cooper, Pupil, year 4,
Graham Cooper, Consultant cardiothoracic surgeon

Nether Green Junior School, Sheffield
Northern General Hospital, Sheffield S5 7AU

EDITOR—Minerva's dentist's concern for the public health hazards of yo yos is commendable.1 To be taken seriously, however, it must be credible. His contention that “walking the dog” is dangerous fails …