How to avoid dental cavities or tooth decay. Prevention is better than cure.Its very effective in dental cavities prevention. To avoid tooth decay take these steps. Brushing at night before sleeping. Use dental floss for interdental cleaning. Cleaning of tongue. Use of mouthwash is optional. Brushing after having food during day . Gargling with water after food and drinks If brushing not possible. Water consumption is very important. Visit Dr Prashant bhangale every 6 months for checking your hygiene and Dental fluoride application every 6 months .