Sterilisation is destruction of all living micro-organisms, including spore (reproductive bodies) of the hardiest bacteria and fungi.This procedure reduce the risk of cross transmission of disease. A- Ultrasonic Bath :- for complete removal of debris from instrument. B- Autoclave :- Most effective and trusted means for complete sterilisation. C- Water distillation plant :- for pure and uncontaminated water. D- Chemical Sterilisation :- for additional sterilisation. E- Ultravilot chamber:- In this autoclaved or sterlised instruments are safely kept for storage. Ultravilot light has antibacterial properties.