California's rules set a clear expectation for clinical work. This is a practical summary, not legal advice, so check the current text with the agencies below.
Cal/OSHA Aerosol Transmissible Disease (ATD) Standard
Cal/OSHA sets workplace safety rules for healthcare employers, including the Aerosol Transmissible Diseases standard (Title 8, Section 5199). How it applies depends on your practice and setting, so confirm it with Cal/OSHA. Where respirators are required, California's respiratory protection rules generally call for a written program, medical evaluation and fit testing.
When an N95 Is Required
There isn't a single rule that says "N95 for every procedure." It depends on the patient's infection status, the procedure, and your written protocols. As a general guide, N95s are linked to aerosol-generating procedures and suspected airborne infections. Your exposure control plan and Cal/OSHA guidance set the specifics.
Dental Board of California Infection Control Rules
The Dental Board's minimum infection control standards are in Title 16, Section 1005 of the California Code of Regulations. Dental healthcare personnel must wear surgical facemasks together with chin-length face shields or protective eyewear whenever aerosol spray, splashing or spattering is possible, and masks are to be changed and disposed of after each patient treatment. The current version took effect on August 20, 2011, so check the Dental Board's website for the latest wording.
What this means in practice: for spray and splatter situations, choose a surgical mask, not a general-use mask. A general-use mask like the FLTR suits the tasks around those procedures.