Hello, You will have to maintain a good oral hygiene by brushing Twice daily,use of mouth wash., Using a floss to clean the interdental area, gargle your mouth after every meal. More over a 6 month once review to dentist is mandatory . To check for the old treatments whether they are good or in bad condition by maintainance you can prevent from further worsening.

Hello There might be many reasons for it genetic or your habit or your maintaining habits

Hi.... The root cause of your issues is oral hygiene maintenance. From your experience it looks like you were not maintening oral hygiene well before. Remaining food debries in mouth

Diabetes is one of the reason of tooth decay. You should go for full body examination. There must be some underlying cause. If not, then please maintain your oral hygiene by properly brushing teeth (in circular motion) twice a day and a good mouthwash eg Chlorhexidine 0.2% twice a day. If you are not satisfied with there treatment you always have an option to visit another doctor. Get properly treatment done and follow all the rules of maintaining good oral hygiene. Take care.

Maintain a good oral care regime with brushing twice a day, flossing and mouthwash. Use a dental floss. Even water flossers are available. You can get fluoride treatment done to reduce the chances of decay. Consult your dentist