Question Contributors (3)

Our lab uses Sirona's inLab MCXL for milling, and have had some issues with milling zirconia crowns. We are having problems with marginal chipping during the milling process. When a prep doesn't allow much space for the margin thickness we usually bulk it out a bit, but that creates a lot of extra grinding time. But my question is would anyone know what might be causing the chipping of the margings when being milled? The machine is calibrated...See more once a week, and we keep the burs fresh, but still get a "choppy" result. Could it be the doctor's prep, or a malfunction with the machine? I hear word other labs don't have this luck, so I was curious as to why we might be having a problem.