Teeth will not become loose because of the cleaning procedure. The teeth are held firmly in place due to the gums and the bone around them. The tartar gathered around the teeth causes infection of the gums and bone.
Root Canal treatment is advised in cases where the nerve within the tooth is affected either due to decay, trauma or fracture. It involves the removal of the damaged or diseased pulp or nerve, cleaning and shaping the root canal and subsequently filling the canals with a suitable material.