cosmetic dentistry_ beauty & science

16 I I case report _ red-white aesthetic directions inside the tooth, lighting up the gingiva from the inside (Figs. 4c & d). The second reason for grey gingiva underneath PFM crowns is metal oxides diffusing into the soft tissue. The possibility of dark gingiva is increased by crowns with a higher ignoble metal content. _Treatment plan After preparing all the necessary paperwork and discussing the treatment plan again, we began re- moving the old crowns and finished the supragin- gival preparation in the middle of April. The stump shade of all six teeth was the same, allowing us to press the copings all at once in the same shade (IPS e.max Press LT A2; Figs. 5 & 6). The provisional was directly prepared in the office. It is important to leave enough space for the papillae so that they are not pushed away (Figs. 7 & 8). After taking the impressions using Aquasil Ultra (DENTSPLY; Fig. 9), the model work was performed (Figs. 10 & 11) and the IPS e.max copings were prepared (Fig. 12). For the pressing process, we used Vario Press 300.e (Zubler). The extremely short pressing time results in a very thin reaction layer. There is therefore no need to etch the item in hy- drofluoric acid. The advantage is the perfect fit achieved because the thin margins of the copings are not rounded by etching (Fig. 13). Afterwards, we applied layers of IPS e.max Ceram (Ivoclar Vivadent). The layering technique is not part of this article (Figs. 14 & 15). The shade and appearance of the tooth texture were copied from the mandibular anterior teeth (Fig. 16). For the first try-in, the crowns were in their final form and size (Figs. 17–19). The patient was more than satisfied with the result so far. We did not have to Figs. 25–30_An overview of the finished crowns on the control model. Figs. 31–33_Close-up image of the papillae directly after seating of the new crowns. Figs. 34–37_Final check-up one week after seating. Fig. 38_The situation five months after seating. Fig. 39_A small black triangle appeared between the central incisors when the saliva was blown away. cosmeticdentistry 2_2013 Fig. 31 Fig. 32 Fig. 33 Fig. 28 Fig. 29 Fig. 30 Fig. 25 Fig. 26 Fig. 27 Fig. 37 Fig. 38 Fig. 39 Fig. 34 Fig. 35 Fig. 36