Most high-production labs have a bone yard of old milling machines that are broken, unreliable, inefficient or too expensive to operate. Kim Karpowitz explains how 97% of the hundreds of U.S.-made Digital Dental mills built in the past 10 years are still in operation and shares why so many machines end up in the bone yard after just a few years. He also covers what questions you should ask the next time you look for a milling machine.

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