Dr. Steven Chang shows the history of the toothbrush along with the many modern designs as well. Dr. Chang additionally shows what each toothbrush in this present day does and how to use each one on your teeth.
Dr. Steven Chang graduated from Loma Linda Dental School in 1991 and currently practices in Monterey, CA. He is a Dental consultant for Holland America Cruise line and a board member of ASAP and ARME. His passion is for humanitarian missions where he teaches dentistry, nutrition, health, and bible truths.