I think most schools focus on mostly didactic work during the first year with the exception of a few schools. Schools are required to teach the didactics -- anatomy, physiology, biochemistry, histology, microbiology, and pathology because they are covered on the boards.
At San Antonio we take biochemistry, gross anatomy, and histology in the first semester with some other courses - biomaterials, radiology, ethics, community dentistry, things like that. Then in the spring semester the major courses are microbiology, physiology, pharmacology, periodontics, cariology, etc. I know they are working on making the curriculum a little different, i.e. moving courses to different semesters, combining some courses, etc. Dental Anatomy and Occlusion is a year long course.
Currently, in second year I have general pathology, fixed pros, complete pros, RPD -- starts in November, periodontics 2, evidence-based dentistry, operative, just finished nutrition, finish radiology this week, finish nitrous this week as well, we also have growth and development, local anesthesia and medical emergencies, etc. Our preclinic courses carry over into the spring, and we have oral pathology, endodontics, oral surgery, etc. Second year is largely preclinic. We do have rotations where we get to do injections and other things. But we really don't get into the clinic until July after 2nd year.