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Digital Lip Bumper (Orthodontics) The Lip Bumper Appliance is a removable device that aids in the distalization of the lower molars. Each bumper is customized to allow an even force from the lip muscle to effectively create space for continued treatment of overcrowding. http://www.odlortho.com/product/lip-bumper/ This device is designed in 3Shape Appliance and realistically rendered plus KeyShot Pro.