Dental Tribune Untited Kingdom Edition

19Lab TribuneApril 16-22, 2012United Kingdom Edition How the best perform GRACEY CURETTES AND EVEREDGE THE MOST EFFICIENT COMBINATION FOR ALL YOUR HAND SCALING NEEDS PERIODONTAL EVEREDGE® TECHNOLOGY is unlike anything you’ve experienced before in a scaler. We’ve applied state- of-the-art technology in metallurgy, heat treatment and crynogenics to create a superior stainless steel alloy for scalers and curettes that stay sharper longer than any instrument you’ve used. That means less frequent sharpening, less hand fatigue, and greater comfort throughout the day. The improved sharpness of EVEREDGE® TECHNOLOGY instruments does not come from a superficial coating – the long-lasting wear is present throughout the entire instrument tip. ©2012 Hu-Friedy Mfg. Co., LLC. All rights reserved. For more information on our products please: - call us on 0770 318 6612 or 0770 318 6474, - visit our website www.hu-friedy.eu - e-mail us on info@hufriedy.eu - contact your regular Dental Dealer. STANDARD GRACEY CURETTE SG5/675 AFTER FIVE GRACEY CURETTE SRP11/1273 MINI FIVE GRACEY CURETTE SAS7/877 HU-FRIEDY - THE ORIGINAL MANUFACTURER OF GRACEY CURETTES! STANDARD GRACEY CURETTE — The Gracey curettes combine a unique offset blade with 9 different shank designs to be used on specific tooth surfaces, thus improving adaptation and deposit removal. Also referred to as Finishing Gracey Curettes. AFTER FIVE GRACEY CURETTE — Designed for instrumentation in deeper periodontal pockets. Elongated terminal shank (3mm) provides better clearance around crowns, and superior access to root contours and pockets 5 mm or more in depth. Thinner blade permits easier subgingival insertion. MINI FIVE GRACEY CURETTE — Designed with the same elongated terminal shank (3 mm) and thinned blades as the After Five Gracey Curettes. 50% shorter blade for access to smaller roots, narrow pockets, furcations, and developmental grooves. Gracey ad_GB_A4_2012.indd 1 16.02.12 14:38 With a monolithic tech- nique (Figs 1 & 2), most res- torations built from lithium- disilicate materials can be completely fabricated. This ap- proach provides high strength and aesthetics but requires surface colourants for the fi- nal shade. When in-depth col- our effects are needed, a par- tial layering technique may be employed. Although no longer a purely monolithic structure (Figs 3 & 4) because the res- toration maintains a large vol- ume of the core material, the resulting restoration should reasonably maintain its high strength. However, no evi- dence supports this. Aesthetic options If covering or masking un- derlying tooth structure is part of the treatment plan, the restorative team can im- agine doing so in an aesthetic way. The ceramist can make that vision a reality with IPS e.max (Ivoclar Vivadent) by using a very high opacity in- got. Ingot opacities available for IPS e.max include high opacity (HO), medium opacity (MO), low translucency (LT) and high translucency (HT).7 The MO ingot can be used as an anatomic framework ma- terial if restorations must be fully layered. LT ingot can be employed with stain and glaze methods or hybrid lay- ering techniques, which have been used for years with IPS Empress Aesthetic (Ivoclar Vivadent). The HT ingot is meant for stain and glaze techniques. Choosing one of these four different aesthetic options de- pends on the preparation and the technique to be used in order to match the adjacent dentition or restorations. In addition, the laboratory can select the processing choice that is appropriate for the se- lected restoration. IPS e.max includes press and CAD/CAM options because lithium di- silicate can be pressed from ingot form or milled from a block form. If the CAD/CAM option is used, the technician will design the restoration digitally rather than perform a full wax-up and invest/press. Preparation options If LT or HT ingots will be needed, then dentists can have flexibility with their prepa- rations because of the trans- lucent margins. This is the situation with partial prepara- tions (for example inlays, on- lays and veneers)—the mar- gins can be placed wherever clinically proper. IPS e.max’s translucency enables dentists to place the margins virtually anywhere on the restoration, blending seamlessly with the natural dentition. Dentists can use a tradi- tional preparation of 1.0 to 1.5 mm reduction (for example a full-crown preparation) if they need more opaque ma- terials (for example HO and MO). Because the resulting restoration will have a slight opacity, the margins will be equi-gingival or slightly sub- gingival. In either case, the material will be fully layered to create the final restoration. IPS e.max provides the choice of using traditional or creative preparation designs. Cementation options Because lithium disilicate can be fully light-cure bonded or cemented using a self-etch- ing primer with conventional resin-cement techniques, IPS e.max also provides options for cementation. Conventional self-etching primer cement is ideal for full crowns. For par- tial and veneer preparations for which adhesive protocol will be used, full light-cure bonding is preferred. Case study A 42-year-old female pre- sented with discoloured teeth that had been repaired with ‘In today’s industry, monolithic glass- ceramic structures can provide excep- tional aesthetics without requiring a veneering ceramic’ page 20DTà