Name	Info	Provider	Link
Dental Health	free resource	MedlinePlus Health Information	https://medlineplus.gov/dentalhealth.html
	free resource	Medicina Oral S.L.	http://www.medicinaoral.com/medoralfree01/aop/21494.pdf
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/28390121/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/28390121
Full text from	free resource	Diposit Digital de la Universitat de Barcelona	http://hdl.handle.net/2445/121887