<prompt> Ozone can be used for All the following except:Disinfection of the root canal during root canal treatmentSterilization of tooth surfaces before making fillings or before inserting crowns or inlaysPrevention of dental cariesInternal bleaching  <response>: As ozone is a great sterilization medium.It is used for:Disinfection of the root canal during root canal treatment.Sterilization of tooth surfaces before making fillings or before inserting crowns or inlays.Disinfection of dental unit water lines.Very fast internal bleaching.Desensitizing the crown preparations. There is a currently only one device that has health and safety executive approval for the treatment of the dental caries in the mouth, and it is named as healozone.Reference: International Journal of Oral Health and Medical Research ISSN 2395-7387 SEPTEMBER-OCTOBER 2015 VOL 2 ISSUE 391 