By Dr. Stephanie McGann, DMD FAGD, Columnist, The Times Spend time on Facebook or any other website for that matter and you will see advertisements for do-it-yourself dentistry. Just today I was solicited for mail-order orthodontics and do-it-yourself veneers. No dentist needed.  These might seem like a great way to save money and get a nicer smile – but there are plenty of pitfalls. Some of...