Fig.1
Patient come to the office after a trauma on the tooth 21.
After the clinical examinations and RX the vitality was compromised and the endodontic treatment had to be
made.

Fig.2
Endodontic treatment performed on the tooth 21.

Fig.3
Shade selection for the communication with the dental lab. Shade A2 Vita Classic was selected for the final
crown. The shade should be selected in the beginning of the appointment with the teeth hydrated.

Fig.4
Tooth 21 after preparation for a ceramic crown.

Fig.5
Application of the astringent retraction paste to have some deflection and space for the impression material.

Fig.6
Astringent retraction paste placed to have some deflection and space for the impression material.

Fig.7
3M Protemp 4 bis-acryl resin applied inside the silicon index.
The silicone index (Express Putty fast set) was fabricated by the previous wax-up shape.

Fig.8
The bis-acryl resin used to make the provisional crown (Protemp 4).

Fig.9
3M Protemp 4 bis-acryl resin applied inside the silicone index.
The mixing tip should be not removed from the silicone index until all the tooth space are filled, in order to avoid internal voids.
After place the index in the mouth we should wait till the gel phase to remove the excess of material. Then keep the index in the mouth for more two minutes and we can remove the silicone index and make the polishing procedures.

Fig.10
3M Protemp 4 provisional crown after polished, cemented provisional in the mouth and excess removal.

Fig.11
Zirconia crown of the tooth 21.
Lab credits to Pedro Brito CDT.

Fig.12
Zirconia crown of the tooth 21.

Fig.13
Internal sandblasting of the Zirconia crown with Cojet (silicatization).

Fig.14
Application of the Scotchbond Universal as ceramic primer in the internal surface of the Zirconia crown.

Fig.15
Application of the Resin Cement (RelyX Unicem) in the zirconia crown.

Fig.16
Insertion of the zirconia crown in the tooth preparation.

Fig.17
Insertion of the zirconia crown in the tooth preparation and excess of the resin cement.

Fig.18
Resin cement tack curing for 2 seconds.

Fig.19
Removing the resin cement excess after the tack curing.

Fig.20
Zirconia crown after cementation.
We can see the natural integration of the ceramic material with the hard and soft tissues, also due the modeling and adaptation of the provisional crown.

Conclusions

The Bis-acryl resin materials are aesthetic, fast and easy solution to fabricate provisional indirect restorations in the dental office.

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