 This study found that the use of an individual biosafety barrier, idbd slash dd, significantly reduced the spread of lactobacillus KCI-sharota when used in conjunction with a dental drill. This suggests that the idbd slash dd could be a viable option to optimize biosafety in the dental environment during the COVID-19 pandemic. This article was authored by Victor Angelo Martins Montelli, Agonaldo Silva Garces, Gabriel Angelo Martins Montelli, and others.