Lasers heal damaged rodent teeth
Shining light on molars turns on stem cells, spurring regrowth of dentin
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/05/mr_lasertooth_feat_free.jpg?fit=860%2C460&ssl=1)
LASER POWER A brief blast of laser light spurs mouse dental cells, shown here in false color growing in a 3-D scaffold, to begin turning into cells that form dentin, the tough inner material of teeth.
P.R. Arany et al/Science Translational Medicine