Snapping on a pair of blue nitrile gloves and glancing at the patient’s name and information on the adjacent screen, Burris saddled up at the farthest chair. Behind him on the wall hung two marker-board thought-clouds inviting patients to tag their Instagram selfies with “#bracesbyburris for a chance to win a BeatBox by Dr. Dre.” Burris is 43, well over six feet tall and burly, with buzz-cut thinning gray hair and a flawless set of teeth. It was not yet 10 a.m., and so far he’d seen more than three dozen patients.