HI, I saw a dentist 5 weeks ago. I have pretty big anxiety when it comes to HIV. The procedure I had done was a camera in my mouth and they used the air sprayer to clear any saliva bubbles away from the teeth to ensure a good picture. My question is, am I at risk if neither of those were not properly cleaned and sterilized? I read on a website that those air/water tips can "reflux" aerosols back into them and that is why I'm nervous if it was not cleaned could they have blown HIV particles into my mouth? I took a 4th generation test yesterday, 34 days since the dentist and it was negative.  Im still so nervous. 

Welcome to our Forum and thanks for your questions.  I'll be glad to comment.  I am not familiar with the dental devices that you describe and have no first hand knowledge of them however I am confident that, even if the equipment had been recently used on a person with untreated HIV (statistically an unlikely event)  improperly cleaned (likewise, unlikely) and there were "reflux aerosols", they would not lead to infection by HIV or related infections.  I can say this with confidence in part because even open mouth kissing with exchange of saliva is not a risk factor for HIV. This is the case even if one of the persons has mouth sores, gum disease or open mouth sores.  Further, there are no occasions when a persons in North America has been proven to acquire HIV from dental procedures.  Finally, your testing further provides support that you were not infected.  HIV tests taken more than 4 weeks (28 days) after an exposure are more than 99% conclusive.---

Thank you for your prompt response! My apologies, I was not so clear about the instruments used. They have almost like a spray gun that they can spray water or air into your mouth.  That was my concern, if by any chance blood was blown into my mouth from a previous patient is that a risk?

thanks for the clarification.  There are no data to suggest that ingestion of blood or having your mouth contaminated with blood from an infected person is a risk for HIV.  I would not worry.  EWH---