Scientists grow human tooth from urine

• Scientists in China say they have successfully grown a human tooth using stem cells taken from urine.
• Researchers say the technique could one day be used as a way to replace teeth lost through aging and poor dental hygiene, with the added bonus that urine is deemed a less controversial source of stem cells than human embryos.
• The team at the Guangzhou Institute of Biomedicine and Health extracted cells contained in the urine which would normally be passed from the body, such as those from the lining of the body's waterworks, and managed to coax them into becoming stem cells.
• They then used these to implant the teeth-like structures in mice, and said the resulting bundle of cells eventually contained “dental pulp, dentine, enamel space and enamel organ,” researchers said.