I never thought it would happen.
My wife grew up with several siblings and never had orthodontic treatment. Her teeth are not unhealthy or unsightly, but some crowding on both top and bottom teeth has started. It took a fair bit of convincing, but I started her Invisalign (invisible braces) treatment last month.
I wanted a few weeks of her wearing the clear retainers before I dared declare success, but she is well on the way to straighter teeth.
