CDE0211

take the enamel (0.5 mm) off a natural tooth, the internal dentine effects would be visible. The tech- nique described here also provides a step-by-step guide to precisely mimicking these internal ef- fects. By enamelling over these effects quickly and accurately, the restoration can be returned to full contour, while including natural optical ef- fects and segmenting both high- and low-value enamels. _Case presentation A 19-year-old male patient wished to improve the overall appearance of his smile (Figs. 1 & 2). As a child, he had chipped both central incisors and needed several temporary repairs that were per- formed by a dentist over the years. The patient underwent a thorough examination. To ensure proper shade matching and design of the restorations, a complete laboratory aesthetic pre- scription, detailed shade mapping, alteration of the type of light source used to take the shade, the amount and colour of the incisal translucency, and surface texture were obtained and recorded. An approved model of the provisional restora- tions was perfected by adding wax and reducing stone (Fig. 3). With a pair of dividers, the exact lengths were verified using a model of the provi- sional restorations. After the facial incisal edge had been out-lined usingaredpencil,a0.3mmleadpencillinewasplaced 0.5 mm lingually. A contour stone (Komet 9001, Fig. 5_An undercut was made inside the silhouette of the incisal half to ensure the establishment of a halo effect. Fig. 6_After smoothing out the incisal facial area, grey, vanilla and salmon stains were applied to create internal effects, then fired. Fig. 7_IPS e.max OE4 was placed to shape the internal lobe structures. They were feathered out after being formed. Fig. 8_To reproduce a natural halo effect, IPS e.max MM Light was added. Fig. 9_IPS e.max OE3 was applied in thin segments to the line angles and strategic places. Fig. 10_The IPS e.max TI1 was built in flush with the previously fired OE3 height of contour and high-value segments to full contour. I 39 industry report _ IPS e.max Press I cosmeticdentistry 2_2011 Fig. 8Fig. 7 Fig. 10Fig. 9 Fig. 6Fig. 5