On the other hand, a hard-bristled brush, coupled with vigorous brushing can result in recession of the gums and the abrasion of tooth enamel and exposed root surfaces.

另一方面，硬毛牙刷刷，刷的积极可能导致经济衰退的牙龈和牙齿的珐琅质磨损，暴露根耦合表面。

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On the other hand, a hard-bristled brush, coupled with vigorous brushing can result in recession of the gums and the abrasion of tooth enamel and exposed root surfaces.

另一方面，硬毛牙刷刷，刷的积极可能导致经济衰退的牙龈和牙齿的珐琅质磨损，暴露根耦合表面。

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