Aus here, for complex dental I can claim up to $800 annually on my extras cover, need braces for around $8000.
Edit: forgot to mention it’d only have been ~$2000 around 2003 when I was first told I needed them, but my parents, whom paid off our house with a year’s combined salary, couldn’t afford it. My dad argued it should come out of his existing child support payment, and I didn’t get them.