CDEN0210

44 I I industry report _ non-prep veneers thin diamond disks, whilst the objects are kept moist and cool. The attachment points are smoothed out usinglightpressureandlowspeed.Next,therestora- tionsaretriedinonthediesofthemodel,andthecon- tact points, occlusion and articulation are checked. If necessary, the surface texture may be adjusted. After these steps have been completed, the ve- neers are carefully blasted using aluminium oxide at minimum pressure and cleaned with steam before they are matched to the tooth shade with IPS e.max CeramGlazeandStainsandIPSe.maxCeramShades, individualisedandglazed(Fig.7).Theyarebesttriedin with Variolink Veneer Try-In pastes. The translucency and shade of these glycerine pastes are identical to those of the polymerised Variolink Veneer luting compositeandthereforethecompositeshade,which providestheleastperceptiblefinalresult,canalready be determined and tested before the veneers are cemented in place. This try-in is performed to check theaestheticsoftheveneersonly;theocclusionisnot checked at this point. After the try-in, the water-sol- uble paste is removed from the veneers in an ultra- sonicbathandthentheveneersarethoroughlydried. _Incorporation The patient was impressed with the veneers al- ready at the first try-in. Her smile, as seen in Figure 8, was an expression of her happiness and the practice team was pleased. The veneers fitted at the first go. The proximal contact points did not require any adjustments. Consequently, the restorations were incorporated immediately. As a basic principle, ceramic veneers are inserted usinganadhesivetechnique.Inpreparingthem,thein- nersurfaceswerecleanedwithwater,driedandetched with 5% hydrofluoric acid (for example IPS Ceramic Etching Gel) for 20 seconds and then carefully rinsed and dried. Next, Monobond Plus was applied and al- lowed to react for 60 seconds in order to achieve the necessarysilanisationofthelithium-disilicateveneers. The patient’s enamel was etched with 37 % phos- phoricacidfor30seconds,rinsedwithwaterandthen lightly dried. Next, the oral cavity was isolated with a rubber dam. The veneers were cemented in place using light- curing Variolink Veneer. This translucent luting com- posite is suited for anterior restorations with a thickness of less than 2 mm. The restorations have to be sufficiently translucent for the luting composite to be effectively light-cured through them. Variolink Veneer is available in a range of value shades, which cause the restoration in situ to appear brighter or darker. This luting composite ensures a strong bond and high resistance to wear. WeselectedVariolinkVeneerintheshadeMedium Value 0 for the present case. This shade is neutral and does not have any effect on the brightness of the restoration. An appropriate amount of luting com- posite was applied to the bonding surfaces of the restoration and the restoration was placed in situ using light pressure. After the surplus material had been removed, each veneer was light-cured for five seconds using a bluephase 20i curing light. Offering a reliable, high light intensity of 2,000 to 2,200 mW/cm2 , the Turbo programme eliminates the risk of insufficient polymerisation. The built-in fan ensures a consistently high light intensity. Excess composite material was removed from the margins of the restorations and then the cement joint was polished with a soft silicone polisher. Withoutadoubt,thethinnerandmoredelicatethe veneers are, the more difficult it is for the clinician to place them. As delicate and fragile the non-prep ve- neers presented in this report may appear when they are first delivered, they are highly stable and durable oncetheyhavebeeninserted.Theadhesivebondwith the enamel ensures a long-lasting high stability and optimal adhesive bond of the restoration insitu. _Looking beautiful Intermsofaesthetics,thetreatmentofthispatient is a complete success. The margins of the restorations aretaperedverythinlyandarenotdiscerniblefromthe cosmeticdentistry 2_2010 Fig. 7_The pressed veneers are individualised with IPS e.max Ceram Shades. Fig. 8_The smile of the patient at the try-in demonstrated her satisfaction with the result. Fig. 8Fig. 7

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