A study in Turku found that 91 percent of those who fell off an e-scooter and suffered facial or dental fractures were drunk at the time of the accident.
Researchers said that reaction times were longer when drunk, and those riding e-scooters often failed to break their falls with their hands, and therefore landed on their faces.
The study looked at records from 23 patients who ended up at Turku University Hospital in 2019.
Rentable e-scooters had arrived on the streets of Finland's former capital at the start of the summer that year.
Two-thirds of those injured on scooters were men, and the majority of injuries occurred in October.