Hi Sir, Yesterday i have visited a dentist because i have sensitivity in my teeth for almost 1 year now. She examined my teeth and told me that i have cavities in my 8 moral teeths and need filling. And she did fill all of them on same day. But still i am not satisfied, because i brush 2 times in a day still how come i had cavity in 8 teeths, also she didn't took any xray of my teeth. I am still thinking if my teeths were healthy and she just filled it without proper investigation. Please help me to clarify my doubts do doctor need xrays to check if cavity is there or not ? Also she showed my tooth it was not black just yellowish on my tooth .. like root structure. Was that cavity? It's 24 hours now, still i have somw sensitivity.