A human tooth has been grown under laboratory conditions by scientists from King's College London.
'This idea of replacing the tooth in a biological way by regrowing it, drew me to London and to King's,' explained the director of regenerative dentistry, Dr Ana Angelova Volponi. 'By growing a tooth in a dish, we are really filling in the gaps of knowledge.'
The scientists do, however, explain that the research is a long way from being usable in clinical practice.
BBC News has more.