The worst thing about teeth is, barring milk teeth, you only get one set. Whether you are young or old, losing your teeth is something many of us face in the world and it can seriously hamper your self-esteem and physical appearance. Solutions such as dentures and implants are in place, but what if you could grow new teeth? That is what Dr. Hiroshi Egusa hopes to achieve in the future, we sat down with him to discuss the future of iPS cell technology and how it could apply to bone and tooth therapy.