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Medline, Cochrane Database of Systematic Reviews (CDSR), Database of Abstracts of Reviews of Effects (DARE), CINAHL, Science Direct, ISI Web of Science, and SCOPUS. The following journals were hand searched: Journal of Periodontology, International Journal of Periodontics and Restorative Dentistry, Journal of Clinical Periodontology, Journal of Dental Research, Journal of Periodontal Research, Periodontology 2000, Journal of Dentistry, Journal of American Dental Associations, Journal of Clinical Dentistry, Lasers in Medical Science, Lasers in Surgery and Medicine, Clinical Oral Investigations, and Photomedicine and Laser Surgery as well as the reference lists of included articles.

Are lasers as effective as scaling for chronic periodontitis?