<s>[INST] I am 61 . Ive had Rhumetiod Arthritis for about 7 years. I have been taking prednizone, metheltrexate, percacet 5mg, or morphine sulphate 5 Mg. most of the time, ususally at a much higher dose than now.  I do have dry mouth during sleep accasionally. 15 months ago I had my teeth x-rayed. No cavites were appearant. In the last 4 months I have lost 4 teeth and I need crowns on about 14 more. I also have osteoperosis. Can you tell me why so many teeth seemed to have decayed so rapidly at one time? Thank you. [/INST] Thanks for your query, I have gone through your query. The increased incidence of caries in the mouth could be because of the compromised immune system since you are taking steroids, and you have reduced salivary secretion. Consult an oral physician and get these things ruled out. You have to maintain the oral hygiene by brushing twice daily, Rinse your mouth soon after eating anything. Consult an oral physician and get the decayed teeth restored and once in 6 months visit a dentist for check up and over all review. I hope my answer will help you, take care. </s>