Different toothpaste available in market
aids as an supportive and maintenance dental care products only, solely not a treatment. As teeth is hardest tissue in our body and once decay reaches pulp and left confined to bone, they can never be removed or refilled by any miracle agent or drugs. So always buy such products only on dentist advice, as sometimes it may not suit you.
Next Steps
Person above 50 years have more attrition and erosion of teeth making teeth more sensitive to harsh dentrifices. kindly take dentist opinion.