The Effect of Aging on Microtensile Bond Strength of Resin Cement to Two Recent CAD/CAM Hybrid Esthetic Materials
Engy Ibrahim Hassan Shohdy;
Abstract
Bonding of indirect esthetic restorations to the tooth structure remains a challenging matter, as the bonding interfaces are increased with the indirect restorative procedure. It is essential to improve the bond strength between the indirect restorative materials and cements, since they are the principal factors in the success of resin-bonded fixed dental prosthesis.
The present study was designed to assess and evaluate the effect of aging on the μTBS of resin cement to two recent CAD/CAM hybrid esthetic materials which are zirconia-reinforced lithium silicate ceramic (Celtra TM Duo) and hybrid resin nano-ceramic (Cerasmart TM) using 2 surface treatment protocols; hydrofluoric acid etching and sandblasting, both were followed by silanization.
Plates were cut from each ceramic material block. Then, the Celtra TM Duo plates were placed inside the ceramic furnace for further maturation. Then, one surface of each ceramic plate was polished using (400, 600) grit SiC paper followed by ultrasonic cleaning in distilled water for 5 minutes. A plate from each material was treated with HF-acid etching and the other plate was sandblasted according to the manufacturer’s recommendations. Then, SEM examination was carried out. Finally, all the plates received a silane coupling agent application.
A Teflon mold of dimensions similar to the cut ceramic plates was fabricated to prepare the composite plates. Another Teflon mold of 6.1 mm thickness was fabricated where the treated ceramic plate was placed inside it, followed by generous application of adhesive resin cement on the ceramic plate then the composite plate was placed above the resin cement, and finally a fixed load (500 gm) was positioned and was light cured using Blue-phase LED unit from each side to ensure optimal polymerization. The resin-ceramic blocks were stored in distilled water for 24 hours. Then, the blocks were fixed on epoxy resin cylinders.
The present study was designed to assess and evaluate the effect of aging on the μTBS of resin cement to two recent CAD/CAM hybrid esthetic materials which are zirconia-reinforced lithium silicate ceramic (Celtra TM Duo) and hybrid resin nano-ceramic (Cerasmart TM) using 2 surface treatment protocols; hydrofluoric acid etching and sandblasting, both were followed by silanization.
Plates were cut from each ceramic material block. Then, the Celtra TM Duo plates were placed inside the ceramic furnace for further maturation. Then, one surface of each ceramic plate was polished using (400, 600) grit SiC paper followed by ultrasonic cleaning in distilled water for 5 minutes. A plate from each material was treated with HF-acid etching and the other plate was sandblasted according to the manufacturer’s recommendations. Then, SEM examination was carried out. Finally, all the plates received a silane coupling agent application.
A Teflon mold of dimensions similar to the cut ceramic plates was fabricated to prepare the composite plates. Another Teflon mold of 6.1 mm thickness was fabricated where the treated ceramic plate was placed inside it, followed by generous application of adhesive resin cement on the ceramic plate then the composite plate was placed above the resin cement, and finally a fixed load (500 gm) was positioned and was light cured using Blue-phase LED unit from each side to ensure optimal polymerization. The resin-ceramic blocks were stored in distilled water for 24 hours. Then, the blocks were fixed on epoxy resin cylinders.
Other data
| Title | The Effect of Aging on Microtensile Bond Strength of Resin Cement to Two Recent CAD/CAM Hybrid Esthetic Materials | Other Titles | تأثير التعتييق على قوة رابط الشد المصغر للصق الراتنجى لمادتى كاد/كام تجميليتين مهجنتين حديثتين | Authors | Engy Ibrahim Hassan Shohdy | Issue Date | 2017 |
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