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Over-brushing – hard brushing will abrade and wear away the enamel layer of teeth and may also cause the gum to recede.
Teeth as tools – biting on hard objects, using teeth as bottle openers can chip their edges.
Overuse of toothpick – using toothpicks create wider gaps between teeth and may cause lesion in the enamel and dentin.
Ice cubes and hard candies – eating these may fracture the molars’ crowns exposing the pulp resulting to toothaches.
Thumb sucking – this interferes which the normal development of jaw resulting to anterior open bite or posterior cross bite.
Tooth grinding –most common cause of wearing away of enamel and dentin.

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