title: Principal requirements for controlled clinical trials in periodontal diseases. Prepared by a working group of the Commission on Classification and Statistics for Oral Conditions.
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D007391:International Cooperation; D009909:Oral Health; D010510:Periodontal Diseases / Q000628:therapy*; D012107:Research Design; D012953:Societies, Dental