Initial Family – LiSi Posterior

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Thursday, March 19, 2020Description :
Several products from the Initial ceramic system from GC have been used to achieve the beautiful crowns in this video. They can also be used for other types of ceramic restorations, such as veneers, inlays, onlays, etc. Initial LiSi is a highly aesthetic feldspar veneering ceramic adapted to the light-dynamics of lithium disilicate frameworks : https://www.gceurope.com/products/initiallisi/ For the framework, the lithium disilicate glass ceramic Initial LiSi Press was used: https://www.gceurope.com/products/initiallisipress/ For further characterization, the painting solutions Initial Lustre Pastes NF and Initial Spectrum Stains can be used: https://www.gceurope.com/products/initiallustrepastes/ https://www.gceurope.com/products/initialspectrumstains/ In this video, a general approach for the posterior dentition is shown; however, the ceramics can be used in various techniques (Classic – One – Expert), as shown in other videos. First, the Initial LiSi Press copings are shaped and prepared; a thin wash firing before layering is required. The palatal surface remains fully anatomical up to the incisal third to maintain stability of the restoration. Preparation Model the LiSi Press crowns fully anatomically and reduce in a controlled manner. In this case tooth 26 stays monolithic, tooth 25 will only be buccally veneered and tooth 24 will be completely veneered. The surface should be gently sandblasted and steam cleaned before applying Initial Lustre Pastes NF. Firing and glazing – tooth 26 & 25 Apply a layer of Lustre Paste L-N on tooth 26 and 25 and gently mix Lustre Body A, B, C or D into the Lustre Neutral to achieve the desired V-shade. Lustre Pastes NF can also be used for wash firing and for individualization of the framework. To mimic translucency and opalescence, use grey and blue Effect Lustres. For very natural looking bright cusps, marginal ridges and secondary fissures, use Effect Lustres Vanilla and Value. Use Initial Spectrum Stains for further characterization. Shape the buccal of tooth 25 using standard Enamels E-57 to E-60 and fire. Proceed with glazing. Firing – tooth 24 Use INside material to cover the marginal area and the occlusal surface. Highly fluorescent Fluo Dentin powders cover the refractive edges of the LiSi Press framework. As LiSi dentin powders are very chromatic, the dentin core can be layered thinly. Apply a thin layer of Clear Fluorescence over the dentin core. Final shaping is done with Enamel and Enamel Opal mixtures. Marginal ridges and cusps are highlighted with Enamel Occlusal and INside powders. Finishing and glazing – tooth 24 After firing, the restoration has a light gloss. Small corrections can be done with the same Enamel mixture from the previous firing. Use Cervical Translucent powders in the marginal area. After finishing and glazing with Lustre Pastes NF, all restorations have a very lifelike appearance with natural light dynamics. Step-by-step by MDT Michael Brüsch

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