GAP Australasian-Dentist-May June 2019

Category AustrAlAsiAn Dentist 75 packable or inverse layering technique in muffle with transparent silicone and halogen light polymerization. Finally, stain was applied in order to customize the prostheses to the patient, and it was polished with rubber and paste polishers (Figure 7). Annual reviews for 4 years were done (Figure 8, 9) without any mechanical or biological complications. Case 2. A 75 years old female, with progressive periodontal problems and partial edentulism. in this case, our final framework was made with a milled carbon fibre disc (BioCarbon tablet, MicroMedica srl, italy) and lithium disilicate crowns (iPs e.max CAD, ivoclar, lietchenstein) cemented over it. (Figure 10–15). the ti- base, in case to use a carbon fibre disc, they must be cemented with a resin cement (relyxunicem, 3M esPe, Germany) to framework. Discussion in the reported rehabilitation cases over implants, the first one was used a CFrC framework covered with composite and, the second one, with lithium disilicate crowns. CFrC shows modulus of elasticity much higher (300 Gpa) than Co-Cr alloys (208 Gpa) and zirconia (210 Gpa) and provides a flexure similar to the frameworks made of gold, which can reduce the stress transfer to the implant 38 and protect the implants from peri-implantitis when both gingival inflammation and overload exist. 6-10 Adjusting the framework to the head of the implant or to the transepithelial abutment, in both cases, are made using a pre-manufactured titanium abutment (ti- base), that ensures an optimum implant- abutment adjustment and prevents possible complications due to corrosion or to bimetallism. 11-14 On the other hand, CFrC reveals no changes in its properties after the hydrothermal cycling. 39 Menini et al. 29 showed that CFrC demonstrated optimal biocompatibility and mechanical characteristics to fabricate frameworks for implant-supported full-arch dentures. Pera et al. 30 in an in-vivo study, compared bone loss around implants in maxillary immediate loading between CFrC and metal frameworks, showing us a less marginal bone loss in CFrC prosthesis. Which would support in vitro and in vivo the clinical success achieved in our in vivo experience. Pressure induced block photo- polymerization and/or thermal- polymerization (packable composite) is particularly suited to cover the CFrC being that the composite worked with this technique has a wear resistance very lInICal Figure 2. Wax-up framework in the muffle. Figure 3b. Putting this mixture to the muffle. Figure 3c. Mixing the filaments of carbon fibre with epoxy resin before to put them into the muffle. Figure 6. Final Carbon fibre’s frameworks after polishing Figure 9. After 4 years of follow-up final rehabilitation. Figure 4. Introducing the mixture of carbon fibre filaments and epoxy resin into the muffle. Figure 7. Final carbon fibre frameworks and composite dentures. Figure 5. Muffle with filaments of carbon fibre inside ready to put into the oven. Figure 8. After 2 years of follow-up final rehabilitation. Figure 3a. Mixing the powder of carbon and epoxy resin. carbon fibre with the epoxy resin (Figure 3 a–c). Both mixtures were introduced into the muffle (Figure 4). Closing the muffle (Figure 5) the CFrC mixture joins to the ti-base screwed to the implants placing the muffle into the oven to get the final framework (Figure 6). next, wax-up was performed over the CFrC replicating all the parameters of the provisional prostheses and checking them in mouth. the wax-up was replaced by composite BioXFill (MicroMedica srl, italy) using the