Dental hygiene practises. Of infection?

Hi...its unfortunate for you to undergo this kind of a treatment ..All the dentists including myself make sure we change the suction tip and gloves and use auto claved (sterlised) instruments for each patients treatment. It's better to open the sterlisation pouch in front of the patient so that he/she will be feeling comfortable to know that we do care about health and well being of both the patient and the doctor .you have every right to  ask about the basic amenities of the clinic.Some times it will be mistake on the behalf of dental assistant or dentist , but I feel sorry for your experience . Regarding infections like hiv or hepatitis it's true saliva is one of mediums of infection .but u need a large quantity of it  say minimum of one large cup of saliva is required to be ingested topass on infection .and suction has a vaccum pull action so every thing inside your mouth is ducked inside not pushed into .so don't worry . Saying all this, I would ask you to meet your dentist to ask these 1) did the patient underwent any procedure where bleeding was present ( blood is required in smaller amount to get infected) 2) do they change the suction tube after every patient . ( at least they will start noticing this ) 3) do they use protocols like disinfecting the suction pumb ( available in market specially designed for suction pumbs to kill and inhibit colonisation of bacteria along the surface of pumb). If you are not satisfied with these answers please  avoid that dental clinic in future . To all other readers select your dentist wisely ..no doctor has right to put your safety into jeopardy.