I had braces at a relatively older age than most people in my early 40s. The dentist warned me at that point that if I was to get braces then he couldn't guarantee the strength of my teeth in the future (older age) and said I might have complications. I read braces were allowed at any age, but why did he warn me at that time? I'm 58 now and my teeth are a bit crooked and I've lost several teeth as well.