Related Experiment Video
Updated: Jul 31, 2026

Oral Biofilm Formation on Different Materials for Dental Implants
Published on: June 24, 2018
Bacterial contamination of dental handpieces
1Department of Conservative Dentistry, University of Stellenbosch, Tygerberg, South Africa.amh@sun.ac.za
Abstract:
Bacterial contamination of water- and air-lines was investigated after artificial contamination and clinical use of dental handpieces. The effect of lubrication, disinfection and autoclaving on this contamination was also addressed. Bacterial growth was recorded in both the air- and water-lines during clinical and artificial contamination, with water-lines showing heavier contamination than air-lines. External and internal surfaces of handpieces still yielded bacterial growth after lubrication and disinfection, while heat sterilisation (autoclaving) rendered both internal and external surfaces sterile.
More Related Videos
Related Concept Videos
Bacterial Signaling
Hand hygiene
Hand washing...
Handwashing I: Introduction and Types of Equipment
Hand wash basins in clinical areas should have faucets that can be turned on and off without using the hands; that is, they should be non-touch or lever-operated.
Cleaning, Sterilization, and Disinfection
Cleaning
The cleaning process usually involves using water with detergents or enzymatic cleaner and removing foreign material from objects and surfaces, including organic material such as body fluids or inorganic material like soil. Cleaning is performed before high-level disinfection and sterilization because foreign materials on the cover of the devices interfere with process...
Standard Precaution
Hand hygiene is the most crucial means to prevent the transmission of disease. Employers are legally required to provide their workers with personal protective equipment (PPE) to minimize exposure or contact with...
Handwashing II: Pre-procedure and Initial Procedure Steps
The hand washing procedure itself includes the following steps. First, cover cuts, if any, on hands with a waterproof dressing. Cuts and abrasions can become contaminated with bacteria hindering the ability to clean the area thoroughly. In addition, repeated hand washing can worsen an injury. The nails must be short and clean, without nail paint...

