Some aids answers

I have done a little bit of research on aids and have found some really good resources that have answered some of my questions. So here are the links
http://www.cdc.gov/OralHealth/InfectionControl/faq/aerosols.htm
http://www.hivdent.org/DTC/dtcwadushsodd102000.htm
http://www.cdc.gov/hiv/resources/factsheets/hcwprev.htm
http://www.ada.org/prof/resources/topics/hiv/ethics.asp

They helped me to understand that there have been no known cases of getting aids from an aerosol, and there is no statements about using the ultrasonic instrument so I assume that it is ok.
Also, they state whether or not you can use extra precautions such as double gloving. Some patients could misconstrue these precautions as discrimination.

Also, there has been no reported cases of PT. to DR. transmission of aids. Universal precautions were set in place to protect health care workers from these type of diseases.

Some other questions that I have and have not found any answers to are:

• Does the Ultrasonic Instrument put the pt with aids at any risk because of their weakened immune system?
• Is there any sterilization procedures that need to be done differently with the instruments used on aids patients?
• How long does HIV stay alive when in contact with oxygen?
• How long does HIV stay alive on hard surfaces?