CDE0111

36 I I industry report _ CLEARFIL SA CEMENT _In past years, adhesive technology has progressed substantially, especially in the area of direct, aesthetic composite restorations. The basis for enamel adhesion through acid etching was laid by Dr Michael Buonocore in the 1950s. Since then, the procedure has established itself as a safe and permanent method for adhesion in dentistry. For a long time, dentine adhesion was not able to provide even nearly as good results as enamel adhesion. Only in the 1990s were products developed that enabled reliable dentine adhesion. Owing to the great results with direct adhe- sive techniques, they were also implemented for the adhesion of indirect prosthetic restorations. The aim was to combine the simple and quick handling properties of conventional cements with the good adhesion of modern composite provisions. This first led to the further develop- ment of classic composite cements and finally to the development of self-adhesive composite cements that do not require extensive pre-treat- ment of tooth structures. The reasons for focusing on self-adhesive cements include numerous clinical trials, which prove that the bond and stability of metal-free crowns on prepared teeth are significantly higher with adhesive composite cements than with conventional cements, such as zinc phos- phate, glass ionomer or polycarboxylate ce- ments. Furthermore, most all-ceramic systems require an adhesive bond with the hard tooth substance to stabilise the ceramic framework. _CLEARFIL SA CEMENT CLEARFIL SA CEMENT is a self-adhesive, dual- curing composite cement for the cementation of indirect restorations, such as crowns and bridges; inlays and onlays made of metal, ce- ramic and composite; as well as root-canal posts. The material is applied directly from the Automix delivery syringe without prior etch- ing or bonding to the hard tooth substance. Furthermore, CLEARFIL SA CEMENT releases fluoride ions into the surrounding tooth sub- stance. Compared with other fixing cements, CLEARFIL SA CEMENT provides an excellent bonding strength to enamel (23.2 MPa) and den- tine (18.1 MPa),1 as well as mechanical stability, in addition to its easy handling properties. Owing to its self-adhesive ability, the dentine tubules are sealed and hypersensitivities thus prevented. CLEARFIL SA CEMENT mainly contains Bis- GMA, TEGDMA, hydrophobic dimethacrylate and MDP. Its self-adhesive ability is achieved reliably and effectively through the unique adhesive monomer MDP as tried and tested in CLEARFIL bonding cements and PANAVIA (both cosmeticdentistry 1_2011 Fig. 1_Initial situation. Tooth #13 with approximal caries, apical osteitis and poor cervical restoration. Prosthetic provision planned after endodontic treatment. Fig. 2_Prepared situation before insertion. Adhesive build-up fillings were placed in the cervical and disto-incisal areas. A retraction cord was used in order to ease cementation and drying. Fig. 2Fig. 1 CLEARFILSACEMENT— Easy to remove, hard to forget! Author_ Dr Jürgen Garlichs, Germany