Fig. 7From: Evaluating the microbial aerosol generated by dental instruments: addressing new challenges for oral healthcare in the hospital infectionLevels of biological tracer particles (mean, ± SD, n = 63) in different height planes (0.5 m, 1.0 m, 1.5 m, 2.0 m) after 15-min simulated tooth preparation were compared (p < 0.05)Back to article page