Dental Tribune Middle East & Africa Edition

Dental tribune Middle East & Africa Edition | March-April 2013 Gert Schimak Tel. + 49 (0) 7761 562 226 Fax + 49 (0) 7761 562 281 E-mail: g.schimak@vita-zahnfabrik.com Internet: www.vita-zahnfabrik.com Contact Information W hen fabricating high-quality dental restorations the aim is always to reproduce the tooth shade so accurately that there is no visible difference between the crown or subsequent restoration and the natural dentition. Whereas adapting the required tooth shade to the patient's remaining den- tition previously required painstaking mix- ing of nuances, step-by-step adjustment and the experienced eye of a dental tech- nician, thanks to VITA, shade reproduction is now part of a systematic process chain comprising shade determination, shade communication, shade reproduction and shade control (as reported in Parts 1 and 2 of this series). In order to achieve an esthetically pleas- ing restoration, determination of the tooth shade is thus equally as important as exact transfer of the shade data to the laborato- ry and the actual reproduction of the shade using the material in question. The final step then comprises the direct comparison of the reproduction with the order sheet, in other words verification of the restoration with regard to exact correspondence with the patient's natural tooth shade. Shade values at the touch of a button Thanks to the option of digital shade taking using VITA Easyshade Advance, shade tak- ing has become even easier and more pre- cise. In a matter of seconds, the patient's individual shade data is available at the touch of a button on the display, and can be saved, sent, and compared. Ceramists can use this device both for shade taking as well as during layering in order to verify the lightness, chroma and hue. Three stars indicate accuracy However, with Easyshade, subsequent vi- sual inspection of a restoration is no longer an imperative; instead this can be performed based on a further digital measurement. All that is left for the dental technician to do is to compare the basic shade data taken with that of the control measurement in order to check whether the reproduced shade corre- sponds to or deviates from the patient's nat- ural shade nuances. If the required restora- tion shade is 3M1, for example, the digital display of the Easyshade measurement de- vice indicates how closely this shade has been matched in the reproduction with a rat- ing of 1 to 3 stars. One star stands for "inade- quate", three stars for "precise". If three stars appear on the display this also means that the lightness, chroma and hue values mea- sured are exactly within the limits for the re- quired shade. If the values deviate, the den- tal technician must rework their reproduc- tion and measure it again. The technician can use the differences in details – "L" stands for "Lightness", "C" for "Chroma" and "H" for "Hue" – in the restoration for this pur- pose (Fig.1). This procedure can be repeated as often as required until the result is satisfactory. The range of features offered by this conve- Three stars for maximum shade accuracy Part 3: Shade reproduction and shade control has never been so precise or reliable year for coloring frameworks made from VITA In-Ceram YZ – the new VITA In-Ce- ram YZ COLORING LIQUIDS. The new concept comprises the basic shades "light" and "medium" that allow shade re- production in accordance with the VITA SYSTEM 3D-Master and VITA classical A1- D4 shade system, as well as the additional shades "intense" and "neutral" that can be mixed with the basic shades for customized shade reproduction. In this way, all VITA shade guide shades can now be reproduced in combination with the veneering ceramic VM9. This is particularly beneficial when it comes to the medium hues: they can now be reproduced more precisely. All these innovations clearly show that the VITA system components – perfectly adapted to one another – ensure maximum precision in shade reproduction, accurate verification of the success of the restoration as well as excellent esthetic results. Fig. 1: Shade reproduction and shade control at the touch of a button using the digital VITA Easyshade Advance measurement device Fig. 2: Nature shows us the way: new CAD/CAM an- terior esthetics in three dimensions with VITABLOCS RealLife Press Release: VITA W ith the zirconia reinforced lithium silicate ceramic, in short ZLS, VITA Zahnfabrik has developed a new genera- tion of glass ceramic materials in collabora- tion with Degudent GmbH and the Fraun- hofer Institute for Silicate Research ISC. The new glass ceramic is marketed by VITA Zahnfabrik under the name of VITA SUPRINITY. With a zirconium dioxide content around ten times that of tradition- al CAD/CAM glass ceramic in combination with a particularly fine-grained and homo- geneous structure, ZLS ensures excellent mechanical properties. The high strength and reliability of the new material gives CAD/CAM practice and laboratory users a wide range of possibilities for application. VITA SUPRINITY is distinguished by its outstanding mechanical strength and is also highly user-friendly. The new glass ce- ramic allows easy manual reworking and excellent polishing, and can also be crys- tallized without auxiliary firing paste. Fur- thermore, its optimum edge stability en- sures improved precision. The end results are esthetically impressive with their nat- ural translucency, fluorescence and opales- cence. With a wide range of indications in- cluding anterior and posterior crowns, su- pra-constructions on implants as well as veneers, inlays and onlays, the new gen- eration of glass ceramic is highly versa- tile. The material is available in the geome- tries LS14 (18 x 14 x 12 mm) for the CEREC / inLab MC XL system in the shades 0M1, A1, A2, A3.5, B2, C2 and D2, each in two different degrees of translucency (T = Translucent, HT = High Translucent). The VITA SUPRINITY Polishing Sets are recommended for the polishing of VITA SUPRINTIY restorations. Shade charac- terization is possible with the new VITA AKZENT Plus stains. The fine-structure feldspar ceramic VITA VM 11 was devel- VITA SUPRINITY - the new generation of glass ceramic oped especially for the individualization of restorations made of the new glass ceramic. The market introduction of VITA SUPRIN- ITY, together with the low-melting veneer- ing ceramic and the special polishing in- struments, is scheduled for autumn 2013. nient, compact device is impressive: it pro- vides reliable measurements within sec- onds in 3D-MASTER, VITA classical A1- D4, and VITABLOCS shades. The material selected by the dental tech- nician for the restoration is not important here – a significant advantage of VITA ma- terials is, however, that the system compo- nents are perfectly adapted to one another. VITA also offers a comprehensive product range in this respect: prosthetic teeth, ve- neering ceramics, acrylics and all-ceramics alike are available from VITA in the VITA SYSTEM 3D-MASTER shades and in accor- dance with the VITA Classical shade stan- dard A1 to D4. The corresponding materi- als are also available for the reconstruction of bleached teeth. And since June 2011, the polychromatic VITABLOCS TriLuxe and TriLuxe forte are also available in classical shades. Optimum shade reproduction with feldspar ceramics The CAD/CAM fine-structure feldspar ce- ramic VITABLOCS RealLife (Fig. 2) has been setting new standards since June 2010 in highly esthetic anterior restorations. The three-dimensional block structure of VITABLOCS features a dentin core and enamel shell and thus has a structure com- parable to that of natural dentition. The curved gradation of shade between the in- cisal and cervical areas in anterior denti- tion is thus replicated. A special software enables the planned restoration to be po- sitioned perfectly in a virtual block. Posi- tioning is flexible, allowing adjustments in all three spatial planes and providing the dental surgeon and dental technician with maximum creative scope. VITABLOCS Re- alLife is available in a total of six VITA SYS- TEM 3D-MASTER shades. Shade reproduction requires a solid basis In terms of shade reproduction, VITA has also launched a new shade concept this New: the zirconia reinforced lithium silicate ceramic VITA SUPRINITY (Photo Courtesy of VITA) 19 8tH caD/caM & Digital Dentistry int'l conFerence, DUBai, Uae, 02-03 May 2013 see the inDUstry at...