different vegetation types and stands of different age-classes, differing structural features, and modified to varying extent by human land-uses. On closer examination, they comprise a complex mosaic of. But this visual appearance belies the truth: forested landscapes are far from uniform. Looking out from a vantage point across a large tract of forest gives a superficial impression of uniformity the crowns of canopy trees follow the folds and contours of the landscape to provide a continuous cover of wooded vegetation. Conclusion: Restorations fabricated from Omnicam based impressions had an inferior marginal fit when compared to those fabricated from Bluecam based impressions.

The highest marginal discrepancy was observed in the inlay group (ns). A trend of marginal fit improvement in the Omnicam-fabricated restorations was observed when Omnicam was used with powder (ns). Results: The Omnicam based restorations displayed statistically signif-icantly lower marginal fits when compared to their Bluecam equiva-lents (p<0.05).

The marginal fit of each restoration was determined by measuring the smallest and largest marginal gaps detected on calibrated macro-photographic images of different surfaces of the restoration using the Image J 1.46 r software. The corresponding restorations were designed and fabricated using the Sirona CEREC® SW 4.0 software, Sirona CEREC® 4.0 MC XL milling machine and 3 M ESPE Lava™ Ultimate Restorative blocks for CEREC®. Methods: Inlay, onlay and crown preparations were scanned using Sirona CEREC® Bluecam and Sirona CEREC® Omnicam with and without powder. Objective: To primarily compare the marginal fit between Bluecam and Omnicam fabricated restorations, and to secondarily assess whether the application of a powder prior to Omnicam impression registration could improve the marginal fit of the restorations. Under the conditions of this study, warm vertical compaction seems to be a less reproducible technique for an inexperienced operator. Conclusion: Micro-CT is a powerful nondestructive ex vivo investigation method that allows qualitative and quantitative examination of root canal fillings. Between vertical compaction and Herofill® (p<0.025), with no statisti-cally significant difference between combined technique and Herofill®.

Blue cam sirona