BeautiCem SA - SHOFU Dental GmbH

BeautiCem SA – All-Round Resin Cement for Easy Adhesive LutingDental professional Uwe Diedrichs on an innovation presented by Shofu at the IDSMinimally invasive and defect-oriented procedures have long since become a must indental practice, which of course also applies to indirect restorations. Besides, certainclinical factors, e.g. short or conical stump geometries, or the type of restoration assuch, may necessitate adhesive cementation. In these cases, the luting material used willhave a considerable influence on the success or failure of the restoration. A basicdistinction should be made between semi-adhesive luting, e.g. with glass ionomercements, and enamel/dentin-adhesive luting. Products designed for the latter either needseparate conditioning of the tooth and restoration surfaces to be joined or have selfadhesiveproperties. On the occasion of the 2013 IDS, Shofu Dental now presentsBeautiCem SA, a high-performance resin cement of the self-adhesive generation.BeautiCem SA is an universal, self-adhesive,UDMA-based resin cement, which releasesand recharges fluoride thanks to Shofu’sproprietary surface-modified S-PRG fillerparticles. It can be used with all indirectrestorative materials and restoration typessuitable for adhesive cementation and isavailable in two shades, “Clear” and “Ivory”,on the German market. The addition ofphosphonic acid, special carboxylic acids and2-HEMA eliminates the need to separatelycondition the tooth structure. Separateconditioning of the restoration surfaces to becemented is also unnecessary; onlyrestorations made of silicate ceramics shouldbe silanised, e.g. with Porcelain Primer byShofu Dental.In this way, BeautiCem SA greatly simplifieshighly technique-sensitive steps, and the factthat it is very easy to handle also contributesto its user-friendliness. The cement comes ina dual-chamber syringe with auto-mix tips(Fig. 1), designed to consistently mix it in thecorrect ratio and without any air inclusions.This direct application system minimises thetime required to place a restoration and mixesonly the amount of material that is actuallyneeded.(1)BeautiCem SA in dual-chamber syringe with auto-mix tipBeautiCem SA is a dual-cure material. It canbe light-cured at wavelengths of 400 to500 nm for 10 to 20 seconds, depending onthe type of curing light used, or allowed tochemically cure in five minutes. Excesscement can easily be removed “in one piece”in a rubber-like consistency after very brieftack-curing or about three minutes of chemicalcuring.

Bond StrengthsIt is remarkable that an all-in-one product likeBeautiCem SA shows excellent bondstrengths without any separate conditioning.When it comes to bonding to dentin, which isparticularly important in its field of application,BeautiCem SA even outperforms similar lutingsystems with bond strengths of approx.12 MPa (Fig. 2).instrumental functional analysis, a wax-up anda treatment plan are made, including aBranemark implant in region 36, which hasbeen “dormant” for more than 20 years. Thefirst step is a 10-week functional pre-treatmentwith the aid of a maxillary bite splint, which isfabricated in the therapeutic jaw relation.(3 a)(2)In-vitro bond strength to dentin after storage in water andthermocycling (internal data, Shofu).The bond strengths of BeautiCem SA torestoratives are still higher. After 24 h storagein water and 2000 thermocycles, it showsbond strengths of 25 MPa to non-preciousalloys, 19 MPa to silicate and oxide ceramicsand approx. 12 MPa to precious alloys. All inall, this product combines exceptional ease ofuse with physical data that absolutely meetthe clinical requirements.Clinical ApplicationThe following report on a complex prostheticcase serves to illustrate the clinical use of thisnew cement. A 67-year-old patient presents inmy practice for the replacement of an anteriorrestoration in tooth 12, which he had just lost.The initial situation is characterised by abilateral posterior bite collapse with asecondary deep overbite and a loss ofhorizontal and vertical dimensions. This hasled to considerable tooth structure defects,especially in the maxillary anterior teeth(Fig. 3a-c). Following clinical and radiographicexamination, as well as clinical and minor(3 b)(3 c)The initial situation is characterised by a loss of horizontal andvertical dimensions: a) frontal aspect, b) left side (mirrorimage) and c) right side (mirror image).

To produce a temporary restoration, which isbest done in the jaw relation established, aduplicate model of the wax-up is made andused to vacuum-form a polyethylene sheet,which then serves as a mould for thetemporary (Fig. 4a and b).(5)Completed preparation prior to impression-taking (mirrorimage)(4 a)To avoid an unnecessary increase in thenumber of alloys present in the patient’smouth (PFM bridge with unknown alloyremaining in the right lower jaw, implant in036), veneered zirconia restorations arefabricated. This choice is also supported bythe fact that only scientifically well-provenindications are treated with these eight singlecrowns and two three-unit bridges. Afterseparate framework and final try-ins, thecompleted restorations (Fig. 6 and 7) can beplaced.(4 b)Vacuum-formed sheet, made with the aid of the wax-upduplicate model (a), and temporary restoration in therapeuticjaw relation (b)During preparation, such a vacuum-formedsheet can be used as a kind of model of thefinal restorations, ideally helping to determinethe necessary tooth structure reduction,because it is often hard to say how muchocclusal or incisal material has to be removedwhen the dentition is abraded. Thepreparation step is completed (Fig. 5) andfollowed by impression-taking and temporaryrestoration.(6)Maxillary saw model

using moderate pressure. This is where theexcellent flow behaviour of the cement comesin handy: When under light pressure, it flowsand forms a film that may be as thin as11.5 µm, but when not subject to pressure, itis stackable and does not flow into areas thatare hard to reach during excess removal.(7)Veneered zirconia restorations on the maxillary model.Following the last try-in, the internal surfacesof the frameworks are carefully sandblastedwith alumina powder (particle size: 50-100 µm,pressure: 0.2-0.3 MPa) and cleaned withalcohol or acetone swabs; separateconditioning before the use of BeautiCem SA(Fig. 8) is not necessary.(9)Direct application of BeautiCem SA to the restoration(8)BeautiCem SA Ivory, ready for restoration placementIntra-orally, relative isolation is ensured usingcotton rolls and/or dry angles, and theprepared tooth surfaces are cleaned usingalcohol swabs. The tooth structure does notrequire any further conditioning, either, thanksto the self-adhesive properties of theBeautiCem SA resin cement. After gentle airdryingof the prepared stumps, BeautiCem SAis directly applied to the restorations with theauto-mix tip (Fig. 9). Then the crowns andbridges are placed on the stumps/abutmentsThe restorations can be held in position eitherby hand or by biting on cotton rolls for fiveminutes (Fig. 10). This time is definitelysufficient for the chemical curing process ofBeautiCem SA to be completed. Excessmaterial should be removed earlier, however,when the cement is not yet fully cured and hasa rubber-like consistency. This is the caseafter about three and a half minutes ofchemical curing or two seconds of light-curing.In this state, excess material is easily removed“in one piece” from interproximal spaces andaccessible marginal areas with the aid of aprobe or a scaler (Fig. 11). During this step,the restorations still have to be securely heldin place, especially if excess cement isremoved at an early point, after brief tackcuring.

References[1] Abo-Hamar S.E., Hiller K.-A., Jung H., Federlin M., Friedl K.-H., Schmalz G.: Bond strengthof a new self-adhesive resin luting cement to dentin and enamel. Clin Oral Invest 9, 161 (2005)[2] Al-Assaf K., Chakmakchi G., Palaghias A., Karanika-Kouma G.E.: Interfacial characteristicsof adhesive luting resins and composites with dentine. Dent Mater 23, 829 (2007)[3] Diedrichs U.: Eines für alles – und auch noch spezialisiert auf Zirkoniumdioxid. DZW 23 (3),15 (2009)[4] Diedrichs U.: Einfache und sichere adhäsive Befestigung ästhetischer Restaurationen ausSilikatkeramik. DZW 24 (37), 29 (2010)[5] Monticelli F., Osorio R., Mazzitelli C., Ferrari M., Toledano M.: Limited Decalcification of SelfadhesiveCements into Dentin. J Dent Res 87, 974 (2008)[6] Vrochari A.D., Eliades G., Hellwig E., Wrbas K.-T.: Curing efficiency of four self-etching, selfadhesiveresin cements. Dent Mater 25, 1104 (2009)First published (in German) in: “DZW – Die Zahnarzt Woche”, no. 10/2013, p. 36-37Zahnärztlicher Fach-Verlag GmbH, Herne, Germany