Halitosis                                                                               Halitosis 

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Haas AN, Silveira EM, Rösing CK. Effect of tongue cleansing on morning oral malodour in periodontally healthy individuals. Oral Health Prev Dent. 2007 5(2):89-94.

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Quirynen M, Zhao H, van Steenberghe D. Review of the treatment strategies for oral malodour. Clin Oral Investig. 2002 6(1):1-10.