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ePaper created 2016-04-15, 11:34:57 | version 1.38.0
Dental TribuneAsia Pacific Edition | 9/201514 TRENDS&APPLICATIONS The possibilities of restoring teeth havegrownimmenselyoverthepast few decades owing to the develop- ment of innovative dental compos- ites. In the past, dentists had to rely onindirectveneerstoproducehighly aestheticresults,but todayadvanced materials are available that offer a suitable alternative in many cases. Composite resins have undergone considerablechangesinrecenttimes. Thedentalresearchcommunityand industry have reacted to the emerg- ingdemandamongpractitionersand patients for these materials, and as a result composite resins are now at a level where they are regarded as state of the art. With modern materials such as IPS Empress Direct (Ivoclar Vivadent), anterior restorations can be efficiently layered to produce highly aesthetic results that are vir- tuallyindiscerniblefromthenatural tooth structure. Consequently, den- talpractitionerscanbenefitfromthe convenient handling properties of composites without having to make any compromises in terms of aes- thetics. In our opinion, IPS Empress Direct is the best material of its kind availableforsatisfyingexceptionally high aesthetic requirements. Owing tothematerial’slifelikeopacity,fluo- rescence and opalescence, true-to- naturerestorationscanbefabricated usingaveryefficientmethod. Generally, the filler composition of composites is more significant in anterior than in universal materials. Acompositeresinhastomeetspecial physical property requirements with regard to volume shrinkage, surface hardness, flexural strength, polisha- bility and wear resistance. Further- more, the optical characteristics have to be carefully balanced. IPS Empress Direct fulfils all of these majorrequirements.Themonomers contained in the composite deter- mine its reactivity, strength, shrink- ageandhandling.Themonomerma- trix incorporates fillers that deter- mine the wear resistance, strength, polishability,surfacegloss,radiopac- ity and translucency of the material. A coarse barium glass filler imparts theDentinshadeswithhighstrength, while the finer barium glass filler contained in the Enamel shades ensures excellent polishability, high gloss and low susceptibility to wear. The composite system comprises 32 shades and five translucency lev- els. The properties of fluorescence, translucencyandopalescencearede- cisivefortheaestheticappearanceof the restoration. IPS Empress Direct obtainsitslifelikefluorescencefrom specialpigmentsandowesitsexcep- tional optical characteristics to its composition. The Dentin shades ex- hibitahigheropacityandcoloursat- uration than the Enamel materials. Therefore, the aesthetic effect is en- hanced from within the restoration. The translucency of the Enamel shades allows the Dentin materials to scatter light in a manner similar to natural tooth structure. Further- more, the Trans Opal shade gives the restoration a true-to-nature opalescence. In reflected light, it ap- pearsbluishandintransmittedlight reddish-orange, which corresponds to the appearance of natural tooth structure. Nevertheless,idealphysicaland optical properties alone are not enough to ensure an aesthetic re- sult. Skill and expertise are re- quired on the part of the dental practitioner who has to impecca- bly layer and shape the restora- tion, as well as faithfully repro- duce the shade and optical char- acteristics of the tooth. For this purpose, a composite should be convenient to handle. IPS EmpressDirectisappliedaccording toanintuitivemethod. Direct anterior restoration placed with a modern composite Lifelike aesthetics achieved with minimally invasive methods By Dr Ali H.Ozoglu,Turkey 9 10 4 5 6 Fig.1:Initial situation with tooth #22 discoloured as a result of endodontic treatment.—Fig.2: Minimally invasive preparation of tooth #22 for the placement of a composite restoration.—Fig.3:The prepared tooth surface is covered with IPS Empress Direct Color in white.—Fig.4:The tooth is completely coated with a layer of IPS Empress Direct in A2 Dentin.—Fig.5: Internal play of colours:IPS Empress Direct Color in blue in the incisal area and IPS Empress Direct Color in honey yellow in the cervical area to match the neighbouring teeth.—Fig.6: Contouring of the composite with an OptraSculpt Pad instrument. Fig.7: After final shaping of the restoration and polymerisation.—Fig.8: Finished and polished restoration on tooth #22.—Fig.9:Two months after treatment:the result is stable.—Fig.10: Examination of the functional situation two months after treatment. 2 31 7 8 DTAP0915_14-16_Ozoglu 08.09.15 09:36 Seite 1 910 456 231 78 DTAP0915_14-16_Ozoglu 08.09.1509:36 Seite 1