Mill Mode Essay

494 WordsAug 6, 20122 Pages
“Regular” Mill Mode vs. ENDO Mode (posted by Roddy on Dentaltown) The proposals from your software don't have anything to do with the visit from the service technician - that you are noticing these "ditched" areas of the intaglio is coincidental. CEREC has two milling modes. Regular (1.6 and 1.2, which correspond to the diameter of the cylinder burs available) and Endo mode. To cut away the intaglio of a restoration with a milling instrument represents an engineering challenge. We are always limited by the dimension and shape of the milling instruments being used. That being said, CEREC has devised two different strategies for milling in order to overcome the limits of the instruments and tooth preparation. For example, in Regular milling mode the software will remove "extra" ceramic in order to ensure a restoration will fit. When the diameter of the intaglio surface is less than that of the milling instrument, the software will remove extra ceramic to ensure the restoration will seat. In short, "No matter what, this baby's going to seat". The following screen shot shows we have Regular milling mode selected (1,6 mm) and at point "a" we see the occlusal portion of the prep has a diameter less than that of the bur. In this milling mode the software will remove the "extra" ceramic in order to ensure the user obtains a restoration that will fit. The Endo mode is a different milling strategy. In fact, it is the opposite strategy. In the Endo mode, the software will not remove any extra ceramic from the intaglio surface which has a smaller diameter than that of the bur. In other words, "No matter what, we will not take ceramic away". In the following screen shot we see the milling preview of same case in Endo mode. Note the milling preview shows the maximum amount of ceramic. [pic] However, it is clear the diameter of the preparation at point

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