[안면윤곽후기] How much does the mouth open after a square jaw?

It's been 3 months now, and one finger goes in. There is a slight gap of about 0.5cm above one finger. When I asked the hospital before, they said I didn't need to practice opening my mouth, but even though I've been in it for 3 months, I feel a little anxious because I can go in with one finger. There was a post by someone who said that their mouths widen -_-;;) For those of you with square jaws, how wide do you open your mouth? I can't believe what the hospital said. Is it really okay for me not to practice?