preprocedural rinse

pre·pro·ce·dur·al rinse

(prē'prō-sē'jŭr-ăl rins)
Antimicrobial or antiseptic mouth rinse used before a treatment procedure begins to reduce the number of bacteria introduced into the patient's bloodstream and to control aerosols released into the surrounding environment.
Medical Dictionary for the Dental Professions © Farlex 2012