The US National Library of Medicine has updated their mobile access for consumer health website MedlinePlus in English and en español.
See the announcement here: http://www.nlm.nih.gov/pubs/techbull/so14/so14_medlineplus_mobile.html
Or, check out the sites! @ http://m.medlineplus.gov/ and http://m.medlineplus.gov/spanish/
MedlinePlus includes information on Oral Health topics.