CDE0111

I 37 industry report _ CLEARFIL SA CEMENT I cosmeticdentistry 1_2011 Kuraray). Owing to the affinity of CLEARFIL SA CEMENT to and good wettability of the tooth surface, the MDP penetrates into the tooth structure effectively and ensures even adhe- sion. Multifunctional monomers and the dual- curing catalyst system provide a high cross- linking rate and good polymerisation character- istics. The mixed, uncured cement has a mildly acidic pH value. After application, the pH value rises until it is neutral in its polymerised state. CLEARFIL SA CEMENT contains 66 wt% (45 vol%) of filler material in and below the micro- metre range with an average size of 2.5 µm, and therefore has exceptional mechanical prop- erties in combination with a thin layer of only 19 µm. Clinical case reports have proven the excel- lent material properties of CLEARFIL SA CEMENT. In an investigation, Dr Cornelis Kleverlaan at the Academic Centre for Dentistry Amsterdam recorded a flexural strength of 81 MPa for CLEARFIL SA CEMENT. A trial by Yamamoto et al. at the University of Osaka demonstrated that CLEARFIL SA CEMENT has a low linear expan- sion rate (0.26%) and low water absorption (27.7 µg/mm³).2 A survey on the quality of the margins by Sadr et al. at Tokyo Medical and Dental University found perfect margins on all samples even after 3,500 thermal cycles.3 (For complete trial results, please refer to the detailed scientific product information of the manufacturer.) Application range CLEARFIL SA CEMENT is suitable for a wide range of indications involving indirect restora- tions and a wide range of materials, such as the cementation of crowns, bridges, inlays, onlays made of ceramic (zirconia, alumina, silica-based ceramic, etc.), hybrid ceramics, composite resin and metal, as well as metal cores, resin cores, metal posts and glass-fibre posts. CLEARFIL SA CEMENT is available in Universal (A2) and White colour shades. Advantages of CLEARFIL SA CEMENT Themostsignificantclinicaladvantageisgood adhesion through the MDP monomer and the resulting secure mechanical and chemical bond to enamel and dentine. CLEARFIL SA CeMENT is a universally applicable material and, owing to the thin layer it creates, allows for an adhesion cement layer of only 19 µm and thus high dimen- sional stability. The low water resorption in com- bination with excellent margin qualities supports long-term stability. CLEARFIL SA CEMENT was developed on the basisofPANAVIA,agoldstandardadhesivecom- posite cement, whose properties have already been proven over a long period of time. The han- dlingparameterswerethemainfocusduringthe development of CLEARFIL SA CEMENT. The re- sulting advantages are undoubtedly its simple handling properties, the quick implementation of the treatment steps, the Automix application and flexible working times. CLEARFIL SA CEMENT can be applied exactly portioned into the prepared restoration or onto the prepared tooth, directly after fitting the mixing tip. According to an internal trial, the relative moisture of the hard tooth substance is of secondary importance. CLEARFIL SA CEMENT provides very good bonding values on both dry, moist and wet enamel and dentine. Thanks to the dual polymerisation mechanism, the curing time can be controlled. After a short initial polymeri- sation of two to five seconds with the curing lamp, excess material can be easily removed. After light-curing the margin for 20 seconds, the restoration will be set tight and saliva-proof Fig. 3_Bubble-free application of CLEARFIL SA CEMENT (Universal) directly from the Automix syringe into the silane-treated, lithium-disilicate glass-ceramic crown. The hard tooth structure requires no conditioning. Fig. 4_Ceramic crown directly after insertion. Excess CLEARFIL SA CEMENT can be easily squeezed out and remains at the crown margin without flowing away. Fig. 4Fig. 3