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The authors of this review tried to answer the question: \u201cIs the effectiveness of lasers and aPDT in the elimination of intraoral halitosis possible?\u201d For this purpose, the electronic database of PubMed and Cochrane Library were searched until September 2021 using a combination of different keywords: (bad breath OR fetor ex ore OR halitosis OR oral malodor) AND (laser OR PDT OR PACT OR photodynamic inactivation OR photodynamic therapy OR photodynamic antimicrobial chemotherapy). Initially, 83 studies were identified. A total of 9 articles were qualified after the application of the eligibility criteria. Eight works concerned aPDT treatment, and only one dedicated to the Er,Cr:YSGG laser. A significant reduction in halitosis occurred immediately after both LT and aPDT. The review found the confirmation of the effectiveness of laser therapy in reducing the number of volatile sulfur compounds (VSC) and the amount of anaerobic bacteria responsible for VSC formation. In most studies, a positive effect was observed for a 1-week follow-up. Laser therapy (aPDT, Er,Cr:YSGG) effectively eliminates microorganisms that produce volatile compounds and can effectively eliminate bad breath for the longer period of time than traditional methods of combatting this ailment.<\/jats:p>","DOI":"10.1007\/s10103-022-03656-3","type":"journal-article","created":{"date-parts":[[2022,11,24]],"date-time":"2022-11-24T18:20:11Z","timestamp":1669314011000},"page":"3403-3411","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Effectiveness of lasers and aPDT in elimination of intraoral halitosis: a systematic review based on clinical trials"],"prefix":"10.1007","volume":"37","author":[{"given":"Agnieszka","family":"Wo\u017aniak","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3801-0218","authenticated-orcid":false,"given":"Jacek","family":"Matys","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kinga","family":"Grzech-Le\u015bniak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,11,24]]},"reference":[{"issue":"1","key":"3656_CR1","doi-asserted-by":"publisher","first-page":"47","DOI":"10.1007\/s00784-017-2164-5","volume":"22","author":"MF Silva","year":"2018","unstructured":"Silva MF, Leite FRM, Ferreira LB et al (2018) Estimated prevalence of halitosis: a systematic review and meta-regression analysis. 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