Influence of polymerization time on properties of dual-curing cements in combination with high translucency monolithic zirconia
| Autor: | Elena Farina, Allegra Comba, Mario Alovisi, Nicola Scotti, E. Manzon, Riccardo Michelotto Tempesta, Lorenzo Breschi, Milena Cadenaro, Damiano Pasqualini |
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| Přispěvatelé: | Alovisi, Mario, Scotti, Nicola, Comba, Allegra, Manzon, Elena, Farina, Elena, Pasqualini, Damiano, Michelotto Tempesta, Riccardo, Breschi, Lorenzo, Cadenaro, Milena |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Time Factors Time Factor 0206 medical engineering Composite number Dental Cements 02 engineering and technology Hardne Composite Resins Dentistry (miscellaneous)3502 Dental Assisting Polymerization 03 medical and health sciences 0302 clinical medicine Hardness Bond strength Conversion degree Curing time Dual-curing cement Zirconia Oral Surgery Dental Bonding Materials Testing Spectrophotometry Lansoprazole Resins Synthetic Zirconium Dentistry (miscellaneous) Cubic zirconia Irradiation Composite material Cement Monolithic zirconia Synthetic 030206 dentistry 020601 biomedical engineering Composite Resin Vickers hardness test Resins Dental Cement |
| Zdroj: | Journal of prosthodontic research. 62(4) |
| ISSN: | 2212-4632 |
| Popis: | Purpose The aim of this in vitro study was to assess conversion degree (DC), micro-hardness (MH) and bond strength of two dual-curing resin cements employed under translucent monolithic zirconia irradiated with different time protocols. Methods 84 square shaped samples of 1 mm thickness were prepared from high translucency zirconia blocks and divided into two groups (n = 24) according to the cement employed: (1) Rely-X Ultimate; (2) Panavia SA. Each group was further divided into 3 subgroups (n = 8) according to the irradiation time: (a) no light; (b) 20 s; (c) 120 s. Light curing was performed 60 s after the sample was placed on the diamond support of a FT-IR spectrophotometer with a high power multiLED lamp. Final DC% were calculated after 10 min. After 24 h, Vickers Test on the cement layer was performed. The same protocol was used to lute composite cylinders in order to evaluate microshear bond-strength test. ANOVA and Bonferroni tests were performed to find differences between MH and bond-strength to zirconia, while for DC% the Scheirer–Ray–Hare two-way test was used. Results The two cements reached higher DC% in subgroup (b) and (c). As concern MH, statistics showed an increase in curing time was able to improve MH significantly. Bond-strength was not affected by irradiation time only for Panavia SA. Conclusions The first null hypothesis has to be rejected since DC% and MH of the dual-cements tested were influenced by the curing time. The second null hypothesis is partially rejected since the bond strength was influenced by the curing time only for Rely-X Ultimate. |
| Databáze: | OpenAIRE |
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