The 17-year-old actor, who rose to fame in hit Netflix show "Stranger Things", was born with the genetic condition, which affects the growth and development of both teeth and bones. As such, he entered the world without collarbones or teeth, meaning he has had to wear a dental appliance for most of his life - leading to the lisp "Stranger Things" fans know and love.
Following his latest operation on Friday, January, 31, the teenager took to social media to inform fans the procedure had gone off without a hitch, sharing a snap of himself from his hospital bed with an ice pack wrapped around his head as he gave a thumbs-up gesture.
"Though my expression in this picture may not show it, the surgery was a complete success," he said.
Prior to the procedure, he shared a similar post, adding: "This was such A big one, it may be the last one I need. Hopefully at least."
Gaten previously had an operation in March, 2019, and another back in 2017 which he announced at the time would take him "one step closer to having (his) own real teeth".