<s>[INST] I am 73 yrs old, sone bypass surgery and having sugar under control with medication. My dentist suggested SENSODENT K TOOTHPASTE and I am using for the past 3 years. Is it harmful or shall I continue with it till my lifetime. I would be grateful to you if you answer my question,jagatheesan [/INST] Thanks for your query, I have gone through your query.The sensodent K tooth paste can be used for 15 days to a month. When you use this tooth paste is used it blocks the exposed dentinal tubules and reduces the sensitivity. Later you can stick on to normal tooth paste. There are no adverse effects of the sensodent k tooth paste. consult a oral physician and get the cause ruled out, if there are any abraded teeth, you can get it restored.I hope my answer will help you, take care. </s>