Please Leave a Review!    THIS EPISODE COUNTS FOR CE! - but read the disclaimers it might not count for your state. Go here to take the test and get your free CE Credit!   Spring Hatfield, RDH, joins Michelle and Andrew on the podcast once again this week. As many of you will remember, Spring is a dental hygienist and co-founder of Masterminds, LLC, who is also a contributing author to RDH Magazine. She has returned today to engage in an examination of the recently published ‘Sources of SARS-CoV-2 and Other Microorganisms in Dental Aerosols’ study with our hosts.   In today’s episode, they review the use of etch in removing stains, Spring’s diplomatic approach in her posts, and, of course, the results, conclusions, and takeaways from the study, along with some questions for its authors. They also explore the importance of testing water lines, the definition of HVE and its usage, some studies regarding mouth rinses, some podcast suggestions, Karen Daw’s guidelines, and the continued use of face shields.     EPISODE HIGHLIGHTS:     Interview starts: 13:06       Etch use in removing stains   Spring’s perspective on getting tagged in posts and remaining diplomatic   ‘Sources of SARS-CoV-2 and Other Microorganisms in Dental Aerosols’ study and a summary of its results   The critical importance of testing water lines   Two current dental lawsuits   The study’s conclusions   HVE definition and use   Questions for the study authors   Studies regarding different mouth rinses   Some podcast suggestions   Michelle’s takeaways from the study   Karen Daw’s guidelines   Face shield usage   QUOTES:   “Spring’s out there doing the Lord's work.”   “I make sure that I separate my science from my emotions…it's a learned skill to be able to not let your emotions get involved.”    “We did the right thing by shutting down and waiting for the research and knowing now what we know.”   “I think they are making the assumption, and probably being hopeful, that everybody followed the ethical recommendations from the ABA to shut down. And we are very aware that that was not the case.”   “This is a robust, good sound methods. Whatever goes after those methods, he says, is probably accurate and good evidence.”   “The point that I'm making with that information is how important it is that we're sterilizing our handpieces.”   “What an argument for testing your water lines!”   “It disproved anybody's idea that COVID could be spread through dental aerosols.”   “It's really interesting that we were looking for one beast and found a completely different beast in our dental office, and that is testing and shocking and treating our water lines.”    “I don't think it's something that people do a lot of and I don't think it's talked about nearly as much as it should be.”    “They tested on the operator, the assistant, the patient and the environment…it’s real world stuff.”   “Understanding the sources of microbial bio load in aerosols is the immediate urgency not only for infection control and dental operatories during Covid 19 pandemic, but also to inform best practices in aerosol reduction, mitigation, and abatement in the long term.”   “One surprising finding was the discovery of microorganisms in the implant irrigant, which was sterile saline.”   “In summary, we find sufficient evidence to reject our null hypothesis that saliva is a potential source of disease transmission during AGDPs. Instead, we identify for the first time that the irrigant used in dental equipment is the primary and major source of microorganisms during AGDPs.”   “We also demonstrate that high volume inter-oral evaluators are highly effective in reducing salivary contamination of the surrounding environment. And that preprocedural mouth rinses consistently reduced salivary microbial bio loads.”   “ ‘Within the limitations of the small sample side, we conclude that the risk of transmission of SARS-CoV-2 and other respiratory pathogens from aerosolized saliva in dental operatories is mod