went there, too. that s the last thing in the world that you re going to think going in to, you know, getting your wisdom teeth taken out, you will be exposed to hiv or hepatitis, it never would have crossed my mind in a million years. reporter: his dentist dr. scott harrington came under suspicion after a different patient was diagnosed with hiv and hepatitis c. the board of dentistry traced the source to harrington s office. they said what they found was enough to turn their stomachs. we were just physically kind of sick. i mean, that s how bad and i ve seen a lot of bad stuff over the years. reporter: inspectors came up with so much bad stuff, they filed 17 violations which include allegations harrington was using expired drugs. one vial was dated 1993. also, even though he used morphine until 2012, none has been delivered since 2009. failing to test sterilizing equipment, called an autoclave.