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In my practice, I use both CEREC, which requires powdering for 3D imaging, and the emerging E4D system, which uses laser scan for imaging. I may be one of the few practices to have both. I believe that there is a time and place for chairside esthetic restorations. In fact, most of the work I do is lab generated because of the complex nature of my large cases. However, for many patients who need an inlay, onlay, or crown restorations, the CEREC and E4D offer viable options. Before you purchase an on-site restoration system, consider the number of restorations you do that fall into this category. If you provide 15 to 20 units per month, you’ll break even; if you do more, you’ll end up saving money.