Which one of the following options is the most effective infection control method to prevent indirect cross infection from one patient to another?

The use of single-use disposables is the most effective infection control method to prevent indirect cross infection from one patient to another. This approach minimizes the risk of transferring pathogens between patients, as each item is designed for one-time use and is discarded after the procedure. This practice effectively reduces the chances of environmental contamination and the potential for pathogens to survive on surfaces or instruments that might be reused.

While handwashing is essential for maintaining hygiene and preventing the spread of infection, it primarily serves as a personal precaution for dental professionals rather than controlling cross-infection between patients directly. Sterilisation is crucial for reusable instruments, but if instruments are not properly sterilized, they can still pose a risk of infection. The use of full personal protective equipment (PPE) helps protect the dental staff and cores but does not directly prevent the transfer of infections between patients. Therefore, while all methods contribute to an overall infection control strategy, the use of single-use disposables offers the highest level of safeguarding against indirect cross infection in a multi-patient environment.