Hey, does anyone know if a full year of physics is required for a lot of med/dentistry schools? also has anyone had experience taking both physics 1bb3 and orgo 2ob3 during the summer?

It's required for some. Look at specific schools/on the OMSAS website to see what different school's requirements are.
I've heard 1BB3 helps with the MCAT regardless, but I don't have personal experience with that.

^ I took 1BB3, but didn't find it necessary. Most of the information you need is in the passages.

OP - I took both 1BB3 and 1BO3 in the summer, no issues there.