This is a question you need to pose to your Cardiologist. I had the same question about 12 years ago with the same sort of scenario, but that was then, now is now... ask your doc.
My general Doctor said to come off both Aspirin and Plavix for 3 days before and 2 days after. When I mentioned this to my cardiologist he wasn't happy at all. He said it should have been 24 hours before and after. So I agree with Flycaster305, I would ask the Cardiologist.
Just to add, your stents were installed way back in 2009 so I don't think the cardiologist will see this as a risk.
I was on Plavix, aspirin and statin when I remove part of my broken tooth in the uni hospital. My dentist just advice me to have it done in the morning instead of late afternoon in case of complication. I was not told to get off the drugs at that time. I was rested for 10 mins until the bleeding stopped before I left the dentist chair.