Welcome To Our Practice If you’re looking for a Florissant, MO dentist for your cosmetic, implant and family dental needs, you’ve come to the right place! Dr. John Boain, Dr. Jenn Boain, Dr. Mark Guttman and Dr. Michael Lorenz and their caring staff are here to help with a unique approach to the art and science of dental care. Seniors, teens, adults, and families throughout Florissant and South St. Louis have relied upon our superior dental care for years. Through a combination of cutting-edge technology, skill, and compassion, our doctors and staff provide a gentle, comfortable, affordable and effective experience that will exceed your expectations.