I assume you need teeth for your endo course. Find out when you guys take endo, and then you can plan based on that. The oral surgery group that i collected from was a really busy practice. i needed teeth for January of 2nd year and i gave them a jar about a month beforehand, but the earlier the better. Unless if your oral surgeon is a family member/friend, talk to the assistants who work there, they will be in charge of either discarding the teeth or saving them for you. We really only needed 15-20 good teeth, and none of them could be 3rd molars, so if you have a lot of teeth, it won't hurt. you'll use them later on or trade with your classmates. Hope this helps!