Just wanted to make a post for anyone out there who is in the situation I was just in. For me, I go to a large state school so getting to know teachers on a first hand basis is nearly impossible unless you go out of your way to visit office hours or have research with them. The thing is, unless you go to a small school where class sizes are like high school, you're most likely not going to know your professor at all come time for letters of rec.
I'd recommend asking them when their office hours are and giving them some information about you, mainly just saying that you're finishing up the application process for dental school and would like to meet to talk about completing the last step, do this via email. Once you meet them in person (some professors won't be able to meet but most will respond positively if you ask to meet), bring them a copy of your transcript, personal statement, and some basic question/answers (like why you wanna be a dentist, current activities, i.e.) and a copy of your resume. Expect to answer some questions regarding the class, where you wanna go to school and basic stuff like that. Most likely, even if they don't even know you, the professor will write you a letter assuming they don't have 50 other ones to write.
Honestly, I was more worried about this part of the application process than any other because I literally knew none of my professors. Just remember that odds are there are a lot of people in your position and that as long as you take the right steps, you will have no problem getting them.
I'd recommend asking them when their office hours are and giving them some information about you, mainly just saying that you're finishing up the application process for dental school and would like to meet to talk about completing the last step, do this via email. Once you meet them in person (some professors won't be able to meet but most will respond positively if you ask to meet), bring them a copy of your transcript, personal statement, and some basic question/answers (like why you wanna be a dentist, current activities, i.e.) and a copy of your resume. Expect to answer some questions regarding the class, where you wanna go to school and basic stuff like that. Most likely, even if they don't even know you, the professor will write you a letter assuming they don't have 50 other ones to write.
Honestly, I was more worried about this part of the application process than any other because I literally knew none of my professors. Just remember that odds are there are a lot of people in your position and that as long as you take the right steps, you will have no problem getting them.