< b="" />Answer:

Brushing teeth should not be done only once in a day.

Explanation:
Brushing teeth is an essential daily hygiene practice that helps maintain oral health. It is recommended by dentists to brush our teeth at least twice a day, once in the morning and once before going to bed. However, the question states that it should not be done only once in a day.

Importance of brushing teeth:
Brushing teeth helps to remove plaque, food particles, and bacteria from the surface of the teeth and gums. It helps prevent tooth decay, gum diseases, bad breath, and other oral health problems. Regular brushing also promotes strong and healthy teeth.

Reason for brushing teeth twice a day:
Brushing teeth twice a day is important because it ensures that the mouth stays clean throughout the day and night. During the day, while we eat and drink, bacteria and food particles accumulate on our teeth. Brushing in the morning helps to remove this buildup and freshen our breath for the day. On the other hand, brushing before bed removes the accumulated plaque and bacteria from the day, preventing them from causing damage to our teeth and gums overnight.

Consequences of brushing teeth only once a day:
If we brush our teeth only once a day, we may not be able to effectively remove all the plaque and bacteria that accumulate throughout the day. This can increase the risk of tooth decay, gum diseases, and bad breath. Additionally, not brushing before bed allows the bacteria to multiply and thrive in the mouth during the night, potentially causing more harm to our oral health.

Conclusion:
Brushing teeth is an important daily practice that should be done at least twice a day. It helps maintain good oral hygiene, prevents dental problems, and keeps our breath fresh. Therefore, it is crucial to brush our teeth in the morning and before bed to ensure optimal oral health.