No, dental treatments are not painful if proper techniques are used. This can actually make the treatment, a pain-free one.
No, it is not. Latest machinery minimizes the exposure of the patient, resulting in the least amount of harm. It is important to follow prescribed guidelines.
Yes, the process of making the teeth whiter is known as teeth whitening.
The remaining food particles on the teeth is turned into acid by bacteria that eats the enamel away, then into dentine and finally Pulp. This results in tooth ache and decay.