http://www.dentalnews.com/2015/06/12/tooth-surface-loss-dental-erosion/
https://dentalsignal.com/dentistry-for-seniors-what-you-need-to-know/
https://www.youtube.com/watch?v=631_a_Oxg3A
https://www.youtube.com/watch?v=o6Gw6vU9gsw