Abstract
The articles in this special section describe the most recent advances in halitosis research presented at the Ninth International Conference on Breath Odor Research, a joint conference with the XXIV CONBRAPE (Brazilian Congress of Periodontology) held at Bahia Othon Palace Hotel in Salvador, Bahia, Brazil on 25–28 May 2011. It has been almost half a century since Joseph Tonzetich of the Faculty of Dentistry at the University of British Columbia, Vancouver, Canada (the first honorable member of the International Society for Breath Odor Research (ISBOR) who died in 2000, and is known as 'the godfather of halitosis research') published his first halitosis paper entitled 'Evaluation of volatile odoriferous components of saliva' in Archives of Oral Biology in 1964 [1]. This was the starting point for breath-odor research, long before ISBOR was established, although research in this area had declined by the time we convened global collaboration in halitosis research.
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