Tongue scraping may freshen breath in gum disease patients

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Voluntary written informed consent of the participant or their legally authorized representative has been obtained prior to any screening procedures * Males or females American Society of Anesthesiologist classification I of II, * 18 years of age or older, * In good general health as documented by self-assessment * Suffer from generalised periodontitis (according to 2018 classification) * Suffer from halitosis with suspected intra-oral cause: organoleptic score (OLS) of 2 or higher by an experienced oral malodour judge * At least one volatile sulphur compounds(VSCs) measurement above the following thresholds: 1. Portable sulphur detector (Halimeter) \> 107 ppb 2. Oral Chroma™: hydrogen sulfide (H₂S) \> 112ppb 3. Oral Chroma™: methyl mercaptan (CH3SH) \>28ppb Exclusion Criteria: * Participant has a history of chemotherapy or radiotherapy in head and neck area * Any disorder, which in the Investigator's opinion might jeopardise the participant's safety or compliance with the protocol * Any prior or concomitant treatment(s) that might jeopardise the participant's safety or that would compromise the integrity of the Trial * Female who is pregnant, breast-feeding or has the intention of becoming pregnant in the following 6 months * Participation in another interventional Trial with an investigational medicinal product (IMP) or device * Recent intake of antibiotics (3 months prior to the first consultation) * Antibiotics indicated as part of the periodontal treatment * Use of antibiotics during the course of the study * Suffer from halitosis with suspected extra-oral cause * Suffer from a systemic disease that could cause extra-oral halitosis (e.g. diabetes mellitus, liver or kidney failure, trimethylaminuria) * Participant has a history of rheumatic fever, neurological deficiencies, or use of medication which may affect periodontal tissue, (phenytoin, cyclosporin, nifedipine, chronic use of non-steroidal anti-inflammatory drugs) * Presence of active caries lesions * Unwillingness to return for the follow-up examination * Wear partial prosthetic dentures removables * Participant has less than 20 teeth