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"Our [system] will straighten the teeth in incremental steps," said Dan Knoch, who founded iPrint 3D. In the years since, Knoch has adopted ever-more-sophisticated technology — building 3D printers, scanners and software in-house — to fulfill his vision of straightening peoples' teeth.

 Source: http://www.timesfreepress.com/news/business/aroundregion/story/2016/sep/04/chattanoogstartsells-orthodontists-3d-printer/384605/