Disinfection and sterilization is an important aspect of dentistry and every good dental clinic strictly follows the rules of sterilization at the end of each working day, just before closing the office. BIOSTER is a device that can successfully sterilize and disinfect the dental unit water circuits. Once the last patient leaves for the day, the dental offices go through the process of sterilization/disinfection cycle. BIOSTER is automatic and mixes water with 3% hydrogen peroxide to sterilize the unit. The process must be done once a week or at the end of the day, depending on usage and after prolonged absence.