Some animals continually lose and replace their teeth.
Kim Loos Dr. Kimberly A. Loos practices general dentistry in San Jose, California. She is also a clinical instructor at University of Pacific School of Dentistry and an editor for Dentistry On-Line. During our lifetime, it may be possible to replace a decayed or knocked out tooth with a new regrown tooth. Humans normally produce only two sets of teeth. When Barx-1 is inhibited, incisors grow.