Open bite- Is jaw surgery needed?

I have a pretty bad anterior open bite from sucking my thumb. I also have a tongue thrust. My open bite is 10mm to be specific. I have trouble eating foods like pizza and salad and sandwiches. I have had 2 years of braces which did not shut the open bite at all. Since normal braces didn't work does that make the open bite skeletal not dental? Do I need jaw surgery? My orthodontist never mentioned jaw surgery before I only realised they did surgery to fix it when I researched open bites.