Check out some of these Cochrane Reviews concerning Oral Health:

Fluoride mouthrinses for preventing dental caries in children and adolescents

Manual versus powered toothbrushing for oral health

Interventions for replacing missing teeth: antibiotics at dental implant placement to prevent complications

Topical fluoride as a cause of dental fluorosis in children

Pit and fissure sealants versus fluoride varnishes for preventing dental decay in children and adolescents

You can also listen to these podcasts about oral health:

Fluoride toothpastes of different concentrations for preventing dental caries in children and adolescents

Motivational interviewing for smoking cessation

Interventions for cleaning dentures in adults (Portugues version)

Extraction of primary (baby) teeth for unerupted palatally displaced permanent canine teeth in children

Visit The Cochrane Library to search for more.