“Getting your teeth straightened no longer means paying $4,000 or more and schlepping to a million appointments. Like pretty much everything else being disrupted these days, startups with good funding are here to upend the teeth straightening industry. And they’re not doing it quietly. They have gone head-to-head in legal and public relations brawls with the dental establishment, detractors, and even regulatory and professional bodies as more and more competitors enter the market.” Racked: The Cutthroat World of Orthodontic Invisible Aligner Startups. (Editor’s note: I’ve found it’s a poor idea to anger an orthodontist.)