Yes. Although your crown cannot decay, the tooth underneath it can. Make sure to brush and floss daily. This will help keep your teeth and gums healthy. See your dentist regularly for checkups and cleanings. With proper care and regular dental checkups, a dental crown can last five to 10 years or more.  The average survival rate for crowns is 90%. It is important for you to brush at least twice a day and floss once a day.  You should also see the dentist at least twice a year for routine hygiene visits. A mechanical toothbrush, like a Sonicare, creates a sonic vibration that cleans the teeth and gums more effectively than a manual toothbrush