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Seth Lookhart was sentenced on Monday at a court in Anchorage, Alaska, for a few things - not just the hoverboard stunt.
He was also found to have committed Medicaid fraud, and even removed a tooth from a patient without their permission having been given beforehand.
According to NBC News, Lookhart performed a dental extraction on a patient under sedation while riding a hoverboard. He also filmed the procedure and provided the footage to others, beyond the team at the dental practice.
Lookhart was found guilty of reckless endangerment, medical assistance fraud, and illegally practising dentistry.
Sentencing, Judge Michael Wolverton said: "In reviewing all this over and over again, I have this visceral response - you darn near killed some people."
Veronica Wilhelm, the patient who had their tooth removed by Lookhart while he was on the hoverboard, also spoke at the trial.
She reportedly told the dentists: "What you did was outrageous, narcissistic and crazy."
She added: "I think you have to be pretty narcissistic - you must be pretty full of yourself to think you can pull someone's tooth out on a hoverboard."
Lookhart had his license to practise dentistry suspended in 2017, and has been ordered by a judge not to practise medicine of any kind during a 10-year probation period when he is released.
Judge Wolverton continued: "Lookhart almost killed many patients by performing anaesthesia thousands of times without training or consent, on patients outside his scope of training and expertise, while stealing money from Medicaid and embezzling from his bosses."
Speaking in his defence, Lookhart's attorney Paul Stockler said: "I want you to know that as his lawyer, I apologise for what he did on that hoverboard."
In a video clip filmed in July 2016, Lookhart can be seen standing over Wilhelm performing the procedure on her, before wheeling away in triumph and gliding off down the hallway.
This incident was merely the tip of the iceberg, it turned out. In fact, Judge Wolverton found the dentist's company Lookhart Dental LLC - which also traded as Clear Creek Dental - guilty of 40 criminal counts, including $1.9 million of fraud.
He was also found to have been unnecessarily sedating patients so that he could maximise the amount of Medicaid payments that he would receive.
According to Google My Business, Clear Creek Dental is now described as being 'permanently closed'.
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