Take control... Bacteria, germs, and protein can enter the internal components of dental handpieces during routine procedures. If left alone, this material dries up and is very hard to remove. Additionally, the general mechanical complexity of handpieces, with miniature gears, a burr-chuck system and many hollow regions, makes cleaning very difficult. Thorough removal of all biological residues is important in order to avoid damage to the equipment and to ensure the hygienic safety of the personnel and patients.