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CDE0111

44 I I industry report _ FenderMate _Making proximal cavity fillings requires a rigorous clinical procedure that must be easily reproducible. The aim is to obtain a dental morphology that reconstructs a tight contact point and avoids future food impaction. Anotherveryimportantgoalis respecting the anatomy and physiology of the patients’ interdental papillae, as well as guaranteeing the balance and integrity of the proximal space. _Compression of the papillae It is much more difficult to obtain a good contact point with composite compared to amalgam because ofthewaycompositematerialneedstobelight-cured. If the proximal matrix does not have a good adapta- tion to the tooth, then too much compression on the composite filling material will result in cervical over- hang.Thisinturnwillcompresstheinterdentalpapillae and may cause periodontal damage to the patient’s tooth(Figs.1&2). _The matrix It is easy to understand the importance of the role of thematrixbothinformingthe filling proximately and chan- nelling the filling material to the correct position. Directa’s FenderMate matrix perfectly fulfils the clinical needs of completing Class II cavities (Figs. 3 & 4). The concept of a steel plate and plastic in- terdental wedge in one piece was initially introduced by Directa in the concept of FenderWedge, a device for protecting the adjacent tooth during preparation, and replicated under the name FenderMate as a matrix system.Theaimistofacilitatetheinsertionofawedge andananatomicallyadaptedmatrixatthesametime. The matrix can be removed in two stages. The interdental wedge, which separates from the steel matrix, can be taken out first and the steel matrix can thenberemovednext.Thematricesareavailableintwo sizes—narrow and regular—and for right and left application. They are colour-coded—green and blue— for ease of identification. FenderMate may be applied eitherbuccallyorlingually. _The contact point The interdental wedge with a flexible wing keeps the lower part of the matrix in contact with the cer- vical walls of the cavity. This causes a slight separa- tion of the teeth so that when the filling is made, it is slightly larger than usual in the proximal direction. Oncethematrixhasbeenremoved,thepatient’steeth will return to their natural position, assuring tight contact between the proximal spaces with the adja- centtooth. The matrix’s convex shape positions the inter- dental contact point in the highest third of the tooth andcreatesapapillarysplaycompatiblewiththephys- iology and the natural interdental space for cleaning. The curved shape of the combined matrix and inter- dentalwedgeformsthematrixaroundthebuccaland lingual limits of the cavity box, and the pre-shaped contact former creates a natural contact point on the patient’stooth(Figs.5–7)._ Editorial note: This article was first published in DENTO- SCOPE58/10,2009. cosmeticdentistry 1_2011 Class II fillings in everyday clinical work Author_ Dr Sylvain Mareschi, France Fig. 1_Previous amalgam filling. Fig. 2_Composite filling. Fig. 3_FenderMate matrix in place. Fig. 4_Filling before initial polish. Fig. 5_Previous amalgam restoration. Fig. 6_Class II composite restoration. Fig. 7_Completed restoration. Directa AB Box 723 194 27 UpplandsVäsby Sweden info@directadental.com www.directadental.com cosmeticdentistry _contact Fig. 3 Fig. 4 Fig. 2Fig. 1 Fig. 7 Fig. 5 Fig. 6