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88 rev port estomatol med dent cir maxilofac . 2024;65(2):85-93

Figure 4. CAD of the lower occlusion baseplate. Figure 6. Digital cast in centric relation.

Figure 5. Maxillomandibular relationship record. Figure 7. Teeth were selected from a digital library and
set using the wax rim as a reference.

On the third appointment, the patient’s labial fullness and Using another 3D printer (Nextdent LCD1, Nextdent B.V.,
occlusal plane were determined, the aesthetic lines were The Netherlands), a teeth try-in was made with a light-cure
drawn on the wax rim, and the occlusal vertical dimension and resin (NextDent Try-In, 3D SYSTEMS, The Netherlands). After
jaw relation were recorded (Figure 5). The teeth try-in was sent printing, the try-in was ultrasonically cleaned with 99.5% iso-
to the laboratory, where the jaw relation record was scanned propyl alcohol (AGA, Portugal) for 15 minutes and put into the
using the Zirkonzhan scanner (S600, Zirkonzahn, Italy). Then, LC-3D Print Box (Nextdent B.V., The Netherlands) for the final
teeth were selected from a digital library (AIDA, Zirkonzhan photopolymerization (10 minutes) (Figure 10). The gingival
library, Italy), according to the patient’s older dentures and the area of the single-color try-in was then covered with a thin
lines drawn on the wax rims, and set using a modulation soft- layer of pink wax to define the gingiva/teeth line and help the
ware program (Modellier by Zirkonzhan, Italy) (Figures 6, 7, and clinician better perceive tooth length, tooth shape, and the
8). Additionally, a facial scan of the patient was obtained using gingival contour (Figures 11 and 12). This layer of wax was
a facial scanner (Face hunter, Zirkonzahn, GmbH) with the pa- applied only on the vestibular flap from one second premolar
tient at rest, smiling, and in occlusion. The facial scan gives to the other.
the tooth size and shape, the amount of tooth exposure, the On the fourth appointment, the try-in was evaluated in the
midline, and the correct buccal corridor (Figure 9). After the patient, and a few minor clinical adjustments were made, par-
facial scans, the master casts and the jaw relation records were ticularly in occlusion (prematurity in the lower second molars’
superimposed. distal cusps). Once the try-in was aesthetically and function-