Removal and Dispersal of Biofluid Films by Powered Medical Devices: Modelling Infectious Agent Spreading in Dentistry. Eames et al

Movies 1-10: Top view videos (related to Figure 2) showing the interaction of air-rotor with a water layer.

Mode-1: The normal operating condition which involves rotation of the bur driven by the air jet while allowing the expulsion of both the air and coolant jet.
Mode-2: Rotation of the bur driven by the air jet allowing the expulsion of the air while water expulsion was inhibited.
Mode-3: Rotation of the bur driven by the air jet while both air and water jet expulsion were inhibited.

Movie 1: Operation in mode-2 but with removed bur on dyed layer.
Movie 2: Operation in mode-2 on dyed layer.
Movie 3: Operation in full condition (mode-1) on dyed layer.

Investigating droplet splashes from water/air jet:
Movie 4: Operation of drill only (mode-3) on dyed film (~3mm thickness).
Movie 5: Operation in full condition (mode-1) with the flow of dyed water on undyed layer (~3mm thickness).
Movie 6: Operation in full condition (mode-1) with the flow of dyed water on dish with no water layer.
Movie 7: Operation in mode-1 but with removed bur and flow of dyed water on undyed layer (~3mm thickness).

Investigating effects of layer thickness:
Movie 8: Operation of drill only (mode-3) on thin dyed water layer (less than ~0.5mm thickness).
Movie 9: Operation of drill only (mode-3) on medium dyed water layer (~1mm thickness).
Movie 10: Operation of drill only (mode-3) on thick dyed water layer (~4mm thickness).

Movies 11-16: Videos (taken with high-speed camera) of the burr engaging with water (movies 11-13, Fig 3a) or unstimulated saliva collected from human participant (movies 14-16, Fig 3b) droplet/ film.

Movie 17: Video of the interaction of the air-rotor (operating in mode-1) with model teeth coated with fluorescent dye. The video was taken using fluorescent lamp.
Movie 18: Video of the interaction of the air-rotor (operating in mode-1 and the coolant water dyed by high concentration of food dye) with model teeth. The video was taken using a bright field light.