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The Cochrane Oral Health Group's Trials Register, The Cochrane Central Register of Controlled Trials (CENTRAL), Medline, EMBASE, CINAHL, ZETOC, ISIWeb of Knowledge and LILACS databases were searched together with hand searches of the journals Annals of Periodontology (1996 to 2003) and Periodontology 2000 (1993 to 2003).There were no language restrictions.

Treating periodontal disease may improve metabolic control in diabetics