B2 ◊Page B1 LAB TRIBUNE LAB TRIBUNE Dental Tribune Middle East & Africa Edition | 3/2020 Fig. 1g: A quick high-gloss polish – e.g. with OptraGloss – and the restoration was done Fig 2a: Having sustained a fracture, the endodontically treated tooth was prepared to receive a monolithic all-ceramic restoration Fig. 2b: The single restoration was milled from IPS e.max ZirCAD Prime Fig. 2c: The sintered crown showed an excellent fit at the intraoral try-i Fig. 2d: The crown was placed on a die model made of IPS Natural Die material to simulate the natural abutment and final characterizations were applied using the staining technique and IPS Ivocolor materials Fig. 2e: The completed restoration was checked on the plaster model one more time Fig. 2f: Self-adhesive cementation can be achieved with materials such as SpeedCEM Plus Fig. 2g: Full contour and stained, the IPS e.max ZirCAD Prime crown delivered an impressive result distinguishing IPS e.max ZirCAD Prime is its unique “gradient tech- nology” (GT). This process technology provides a number of advantages that are par- ticularly relevant for use in dental applications: 1. High-translucent 5Y-TZP zirconia (650 MPa1) for the incisal area AND high-strength 3Y-TZP zirconia (1200 MPa ) for the replacement of dentin - combined in just one disc 2. Continuous seamless progression of shade and translucency within the material due to a specially designed filler technology 3. The microstructure achieved by “Cold Isostatic Pressing” (CIP) ad- ditionally optimizes the material’s translucency and ensures a very high accuracy of fit. On the test bench Fully dedicated to digital dentistry, our practice is equipped with DVT equipment, CAD/CAM milling ma- chine and other digital tools. To offer our patients the best possible care, we are open towards new, promising treatment methods and materials and always try to be up to date with the latest possibilities. We are espe- cially passionate about providing highly esthetic metal-free restora- tions. So, we decided to test drive IPS e.max ZirCAD Prime in two initial applications to see if, in everyday use, it can keep the promise that the manufacturer made in theory about its Gradient Technology. Since every- day applications in prosthetic den- tistry mostly involve single-tooth crowns and three-unit bridges, the new material would be tested in one of each of these two clinical cases. 1st patient: This patient presented with pain to our practice: A metal- ceramic restoration on tooth 45 to 47 was fractured. Replacement with an all-ceramic monolithic restoration appeared to be a valid alternative in this case. The basic advantage of all- ceramic restorations is that no sub- gingival preparation is necessary to conceal metal restoration margins. A major advantage of monolithic res- torations is that they help minimize/ prevent ceramic chipping. Figures 1a to 1g show the restoration procedure with a three-unit posterior bridge made of IPS e.max ZirCAD Prime. 2nd patient: This patient presented with a fracture (up to the cervical third) of the maxillary lateral inci- sor on the right. The tooth structure at the site of tooth no. 12 had already weakened as the result of a previous endodontic treatment and compos- ite filling. In view of the limited space available for the new restoration and the functional dynamics of the pa- tient, we decided to use a monolithic zirconium oxide restoration in spite of the tooth being in an exposed zone. Figures 2a to g show the restor- ative procedure with a crown made of IPS e.max ZirCAD Prime. AD Our findings - Given the high strength of IPS e.max ZirCAD Prime, we felt assured that we could use this material - with peace of mind - for the load-bearing region and for a case involving unfa- vourable functional dynamics. The material is also suited for long-span bridges. - With its decreasing chroma and in- creasing translucency in the incisal area, the material reproduces the tooth structure in a seamless flowing pattern, similar to the natural denti- tion. - As the material provides a higher opacity in the dentin portion, it can be expected that any discoloured tooth structure would be reliably concealed, even in restorations in- volving thin wall thicknesses. - In addition to the monolithic technique, veneering and cut-back techniques can be used to process the material in lab fabricated res- torations. Customized and highly esthetic results can also be achieved by characterizing the surfaces of the restorations using the staining tech- nique and IPS Ivocolor. The staining technique is ideal for cases in which function-related ceramic chipping cannot be ruled out or veneering is not possible due to a lack of space. - Speed sintering and efficient finish- ing procedures enabled the laborato- ry to deliver the restorations on the dot. In addition, the high accuracy of fit minimized the need for subse- quent adjustments by grinding. Conclusion As esthetic as lithium disilicate and as strong as zirconium oxide - IPS e.max ZirCAD is a material that com- bines the best of two materials in one. The material stands out from comparable products on the market due to its innovative process tech- nology (GT) and seemingly small but decisive details. The material passed its acid test with flying colours - this progressive all-ceramic solution matches our high expectations per- fectly. For more information contact: Ivoclar Vivadent AG Bendererstrasse 2 9494 Schaan/Liechtenstein Tel.: +423 235 35 35 Fax: +423 235 33 60 E-mail: info@ivoclarvivadent.com Web:www.ivoclarvivadent.com