I had it done near Apgujeong Rodeo.
At first they suggested inserting 3 threads, so I had 3 threads inserted, but the effect was minimal.
When I went back, they said to add 3 more, so I had more inserted.
The threads protruded toward the gum area, causing repeated headaches, tooth sensitivity, and pain.
Filler would honestly be better; I really don’t think threads are it;;