I have a lot of cavities on few of my back teeth? What should I do with them? Is a root canal of all those teeth is necessary?

Need Evaluation. Once your dentist evaluates your teeth, the proper treatment can be recommended.
See Dentist. See dentist soon. Root canal not usually needed unless cavities are deep.
Oral Care. Oral care is essential to achieve a healthy, beautiful smile and general health. As cavity progresses, more invasive and expensive treatments will have to be taken. Therefore, you should respond to the problem sooner, rather than later, by scheduling an appointment with a dentist for a proper treatment plan.