The aim of this trial was to establish the clinical efficacy of Listerine and chlorhexidine (CHX) when used as a cooling agent with ultrasonic instrumentation, on periodontal parameters and halitosis.

Ninety patients with periodontal disease participated for the study. Individuals were randomly selected to a control and test groups. At baseline, all subjects completed a questionnaire and carried out an examination. Standard periodontal outcome variables were assessed. For both groups, the plaque index (PI), gingival index (GI), pocket depth (PD), bleeding on probing (BOP) and clinical attachment level (CAL) scores were enrolled at baseline and after 30 days. Volatile sulphur compound (VSC) levels were evaluated by a Halimeter (Interscan Corp., Chatsworth, CA, USA) at baseline (T0), immediately after treatment (T1), and at 7 (T2), 14 (T3) and 30 days (T4).

Inclusion Criteria:

• In the present trial, who had periodontitis from patients undergoing periodontal treatment at the Department of Periodontology of our institution

Exclusion Criteria:

• Individuals who presented any systemic disorders which cause halitosis (diabetes mellitus, nephropathy, liver disease, gastrointestinal diseases, respiratory problems), pregnancy or lactation, individuals who had taken antibiotics over the last 6 months or permanently used any drugs, individuals who had any form of periodontal treatment within 6 months prior to the study.