In this presentation, Dr. Bärbel Hürzeler uses the composite material Enamel HFO to aesthetically augment tooth 11 and to cover a cervical defect on tooth 13. Once a rubber dam has been put in place, old filling material is removed. After the surfaces to be augmented are sand blasted, Dr. Hürzeler exerts great care to place the matrix bands.
The transparent matrix bands are applied interproximally, where cervically they need to be secured between rubber dam and tooth in order to keep excess material to a minimum. Additionally, they are applied in the shape aspired after restoration. The matrix bands are secured in position using a plastic provisional filling material. After etching and conditioning of the tooth surfaces to be treated, the individual layers of composite are applied.
The layer procedure begins in the cervical area, where first a flowable composite is applied to fill the space between matrix and tooth followed by the increments in the interproximal and in the palatal area. In the cervical and in the palatal area composite layers with darker shades are used to achieve a natural look. Finally a thin enamel layer is applied. During the composite application the inclusion of blisters has to be avoided. The same procedure is used for coverage of the cervical defect on the upper right canine caused by excessive exposure to acidic agents.
However, the rubber dam must be cut open in region 13 so that the cord impregnated with adrenaline can be inserted into the sulcus to staunch bleeding. A curved scalpel, Soflex discs, and green and brown rubber polishers are finally used to refine the surfaces of the composite restorations