The standard for validation of steam sterilization processes EN ISO 17665-1 requires monitoring of steam penetration inside of hollow instruments with each cycle. Therefore, the gke Dental-BMS can be used, if hand pisces and saliva ejectors are the most difficult instruments to be sterilized. The ghe Dental-BMS consists of a process challenge device (PCD) and an indicator strip. The PCD can be used for an unlimited number of cycles. The durable material ensures reproducible results. The Dental-BMS is not calibrated to the requirements of a sterilizer standard but to the requirements for a typical packaged dental load.