Objective The purpose of the study was to detect the air particle concentration of the dental implant surgery using local air laminar flow system in dynamic environment and to explore the related factors of its changes.Methods The air samples were collected in a chosen dental implant surgery with local air laminar flow system on and 20 implantology cases were included. The air particle concentrations were detected by Handheld Particle Counter at every 15 minutes from the time point of 10 minutes after air purification to the end of the implant surgery. And the staff movement frequency was also recorded.Results There were two peak particle concentrations at the time spot of 15 and 60 minutes after operation. And air particle concentration had a positive correlation with the staff movement frequency（P＜0.05）.Conclusion The activity of staff movement has great impaction on the air cleanliness. Accordingly, effective management of staff reasonable work procedure is vital for infection control.
