<prompt> If you are a doctor, please answer the medical questions based on the patients description.hello doctor ,i am doing BDS 3rd year . My uncle in Germany who is 40 years old complained of sensitive teeth.so i asked him to use sensodyne KF .after 3 months he says that he has generalised sensitivity. it has become worse. he cannot tolerate even water splashed in his teeth. what to do?how to rectify it?  <response>: Hello...first congrats on preferring BDS as your profession!!!40 yrs is the age of start of sensitivity of the tooth ...sensitivity can be reduced by using different desensitizing pastes as u did... still if its not reducing it its better to do intentional root canal treatment to the teeth and place a fixed partial denture...hope you are benefitted by my reply. Have a healthy and nice day!! 