Page 9 - Dental Technology 12-3

8-12-NONDAS VLACHOPOULOS-Q8_6-7-8-Ivoclar.qxd 10/6/2022 8:07 PM Page 2

prosthetic section 09
DENTAL TECHNOLOGY, JULY-SEPTEMBER 2022

FIG 9 FIG 10 FIG 11

FIG 12 FIG 13 FIG 14

FIG 15 FIG 16a FIG 16b

FIG 17a FIG 17b FIG 18

FIG 19 FIG 20 FIG 21

ity and aesthetics. The path of insertion, bar STL file is sent (exported) to the milling and additional use should be made of
available space, bar morphology, dimen- center and the titanium bar is milled. Then chemical etching with metal primer on the
sions, occlusal plane, peri-implant papilla the bar is repositioned on a manual milling bar and ceramic primer inside the zirconia
space, soft tissue areas, are all important machine in order to do the final combined frame. Important is the soft tissue contact
factors to be considered during the design milling. Two different inclinations are cho- and emergence of the prosthesis in the soft
process. sen, 0 degrees in the neck area and 4 tissue region. This area is designed as pon-
During the design process, it is important degrees on the rest of the bar. tic of a bridge to facilitate self-cleaning and
to double check and verify with the pre op This is done in order to minimize the hygiene of the area (Figures 23 & 24).
STL of the interim prosthesis, that the bar is cement space especially in the neck area, Accordingly, the peri-implant soft tissue
placed in such a position so as to ensure the but also to avoid stresses when the bar is fit should be pressure free. Finally, the final
required thickness of zirconia intraorally inside the zirconia frame (Figure 17). control and comparison with the pre op STL
(Figure 16). The final surface of the bar should be file is done, in order to verify that the
After the end of the design process, the sandblasted with 50m aluminum oxide, design is identical to the original certified