Infection Control for Dental Assisting Practice Exam 2025 - Free Dental Assisting Infection Control Practice Questions and Study Guide

The most effective materials for surface barriers in dental settings are impermeable materials such as plastic wrap and aluminum foil. These materials provide a protective layer that prevents contaminants, such as blood and saliva, from reaching the surfaces of dental equipment and instruments. By using barriers that resist moisture and are non-porous, dental practitioners can minimize the risk of cross-contamination and ensure a safer environment for both patients and staff.

Other options, such as paper towels, napkins, or lint-free cloths, are not suitable as primary surface barriers because they are generally absorbent and can allow the passage of fluids, increasing the risk of contamination. Similarly, cardboard and wood are porous materials that can trap bacteria and other pathogens, making them ineffective for infection control in a dental practice. Hence, the use of impermeable materials is crucial in maintaining proper infection control protocols.