As a teenager I had both canines in my palette. These were treated with fixed appliances. One has settled fine but the other as never settled. I had my braces off 5 years ago. I have broken 4 retainers where the tooth cracks them. I still have to wear a retainer else the tooth wobbles. The tooth is set a few mm back. Would invisalign be an option? Would something else be better? I don't want train tracks again.