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Teams of researchers around the world are looking for ways of growing new teeth to replace those lost with age and poor dental hygiene.

Stem cells – the master cells which can grow into any type of tissue – are a popular area of research.

The group at the Guangzhou Institutes of Biomedicine and Health used urine as the starting point.

Cells which are normally passed from the body, such as those from the lining of the body’s waterworks, are harvested in the laboratory. These collected cells are then coaxed into becoming stem cells.