I think the above poster means Lothrop Street. I'm not familiar with any lodiam street. You can also try Soldiers and Sailors parking garage at the corner of Fifth and Bigelow. It's a bit of a hike from there to the dental school, but not bad at all (probably a 10-15 min walk if you walk slow). Plus you'll get to see some of Pitt's lower campus on your way up!
Just a word of warning. The parking garage on Lothrop St was indeed the most convenient but it was more expensive than I had anticipated. I had just about $11 with me but the cost for parking for a day ended up being $18.xx. I had to bum $7 from another interviewee. And they wont take a charge card.
By the way if you are not familiar with the area, check googlemaps "Stree view" for the area.
They didn't give you a ticket for a discounted price? That Sucks! I hope your interview went well at least!
^There aren't subways that go to Pitt campus. A lot of busses, however, will. Like almost all the busses in that area will stop on Forbes or Fifth ave. which is super close to the dental school.