Please activate JavaScript!
Please install Adobe Flash Player, click here for download

Dental Tribune Middle East & Africa Edition No. 3 2015

lab tribuneDental Tribune Middle East & Africa Edition | May-June 2015 3C < Page 1C Fig. 6. Translucency Fig. 8 Fig. 7. Zirliner Fig. 9. Aiham Farah. CDT, Syria Technical Training Consultant Near East & Orient Ivoclar Vivadent Email: aiham.farah@ivoclarvivadent.com Contact Information LiSi from GC Master your lithium disilicate challenges GC EUROPE N.V. Head Office Tel. +32.16.74.10.00 info@gceurope.com http://www.gceurope.com 186262-GC-LiSi-ADV-210x297-E.indd 1 11/03/15 14:49 for example), we remove all the trace of milling dust and residue from the inner surface, then we can use the oil-free compressed air. But we never use steamer or water bath to clear non-sintered restoration. - With a fine grinders head, and diamond bars, we could leave a natural texture on the labial sur- face of some high esthetic resto- ration. Note that the hand peace speed should be low. - With the coloring liquid and (Brush) infiltration technique, and with the help of the Visu- aliZR we can map-shade the white stage, like enhance the translucency in the incisal third by using Violate-gray. - With the infrared lamp or dry- ing cabinet, The infiltrated res- torations must be fully dried be- fore they are sintered, less than 140o C. Further staining after sinter- ing using Zenostar Art Moduls stains One first bake (880C for 2min hold) for fixing the stain, and one another bake (880C for 2min hold) for glaze. Note in (Fig. 4) the final outcome after glaze of Zenotar T0, being shifted by stain to BL1 color. 2nd Set: Working steps after the milling (Fig. 5). Cut-back tech & character- izing using brush infiltration tech. - If our CAD design not chosen to be (reduced) design first, and we decided to do the cut-back later after milling, we have to do it manually on the white-chalk stage. (In our case, a cut back was done on one central all the way to the cervical, and the oth- er one was left full contour to be stained). - With the correct grinding in- strument, we reduce on the in- cisal third of the labial surface of the restoration. - With a sharp rubber polisher, and on a low speed, we create the suitable mamlon cut. - With a polishing brush disk (LISKO for example), we smooth the fades left by the rub- ber wheel. - With the coloring liquid and (Brush) infiltration technique, and with the help of the Visu- aliZR we can map-shade the white stage, like enhance the translucency in the incisal third and between the mamlon fin- gers by using Violate-gray, and highlight the mamlon fingers by using Ivory. (Fig. 6 shows the re- sults after sintering). - With the infrared lamp or dry- ing cabinet, The infiltrated res- torations must be fully dried be- fore they are sintered, less than 140o C. Layering with IPS emax Ceram After applying the Zirliner on the labial cut-back area (Fig.7) and slightly glaze and stain the other central, we bake on (960o C for 1 min), then we proceed with layering over the central (Fig. 8): 1. 1st Wash & foundation layer (baked on 750o C for 1min) 2. 2nd Internal (Impulse) layer (baked on 750o C for 1min) 3. 3rd Transpa Incisal (Ti1) layer (baked on 750o C for 1min) 4. 4th Final glaze on both cen- trals is conducted on (725o C for 1min) Manual polishing on both cen- trals is necessary after glaze for perfect gloss match (Fig.9). 1 2 3 4 186262-GC-LiSi-ADV-210x297-E.indd 111/03/1514:49 12 34

Pages Overview