The paper clip - what a great demonstration of how it works. This is the first time I understand how these springs work.

Love the paperclip picture to explain how the spring work

Thanks so much Doc ! Could you please add some videos for Periodontics ? Please you make easier the study for me , I will take the NBDE part 2 ,on April 2019 my first language is Spanish but I understand really well your explanations . I really appreciate your videos ,Thank you

thanks a lot, Dr. Ryan ♥ you're amazing. keep them coming, good sir..getting to learn a lot.. 😊 where do you practice?

Thanks