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cosmetic dentistry_ beauty & science

20 I I clinical technique _ SDR cosmeticdentistry 4_2011 Fig. 2_Initial cavity preparation after removal of the defective composite restoration. Fig. 3_SONICflex air-driven scaler and SONIC- flex prep ceram tips (both KaVo) that were used to redefine the margins of the proximal boxes. Fig. 4_Final cavity preparation after caries removal and preparation of the enamel margins of the proximal surfaces with the SONICflex prep ceram tips to ensure removal of any unsupported enamel. Fig. 5_Angulated view of final cavity prepara- tion.Notetheextendeddepthofthedistalgingival margin from the occlusal surface. Fig. 6_HaweContouredTofflemire-Bands(Kerr) were used in a Tofflemire holder to ensure correct contour of the definitive restoration. A circular matrix rather than a sectional matrix was selected because of the missing upper first molar. Fig. 7_V-Ring (Triodent) was utilised to create separation between the canine and premolar in ordertoensureatightinterproximalcontactpoint. Fig. 8_Wave-Wedges (Triodent) of various sizes were utilised to seal the matrix band against the mesial gingival cavity margin to gain a tight marginal seal, reducing the possibility of contami- nation to ensure the establishment of an uncom- promised bond strength. Fig. 9_Matrix assemblage: Hawe Contoured Tofflemire-Band in a Tofflemire holder, activated V-Ring and small Wave-Wedge (white). Note the inadequate adaptation of the matrix band to the mesial gingival margin on the buccal aspect of the cavity preparation. The small wedge was re- placed with a larger Wave-Wedge (pink; Fig. 12) to achieve improved adaptation of the matrix band to the gingival enamel margin. Fig. 10_Enamel and dentine surfaces were etched for 15 seconds with 36 % phosphoric acid, rinsed with water and lightly air-dried. Two coats of XP BOND (DENTSPLY) were applied to the etched enamel and dentine surfaces, agitated withamicro-brushfor15seconds,lightlyair-dried and light-cured for 20 seconds with a VALO light- curing unit (ULTRADENT). Fig. 11_The SDR Compula Tip has a fine tip for precise dispensing of the material with the at- tached macro-dispensing tip. Fig. 12_After the bonding protocol, the SDR material was dispensed using slow, steady pres- sure from the deepest portions of the mesial and Fig. 10Fig. 9 Fig. 11 Fig. 13Fig. 12