Banca de DEFESA: ANA MARGARIDA DOS SANTOS MELO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANA MARGARIDA DOS SANTOS MELO
DATA : 27/06/2018
HORA: 09:00
LOCAL: Departamento de Odontologia
TÍTULO:

Use of dual-cured adhesive systems and its impact on degree of conversion in situ, marginal adaptation, bond strength and nanoleakage of composites in dentin cavities

PALAVRAS-CHAVES:

Composite resin. Polimerization. Dental marginal adaptation. Dentin-bonding agents.

PÁGINAS: 20
GRANDE ÁREA: Ciências da Saúde
ÁREA: Odontologia
RESUMO:

The proper polymerization of adhesive system influences the mechanical properties and longevity of restoration. The effect of irradiance on the adhesive layer in deep cavities is still unknown, in which dual-cure adhesives may be a viable alternative. Objective: To evaluate the influence of the use of dual-cured adhesive systems cured in different ways on the degree of conversion on hybrid layer (GC), marginal adaptation (AM), bond strength (RU), failure pattern (PF) and nanoleakage (NN) of adhesive interfaces of restorations with composite resin in dentin cavities. Methods: High C-factor dentin cavities were prepared on 120 bovine incisors with maxicut burs in custom-made preparation, creating cavities with 4 mm of depth, which were then restored with the composites Filtek Z250 XT [XT], Filtek Bulk Fill [FB] and Filtek Bulk Fill Flow [FF] with the adhesives Single Bond Universal [SB], Adper Scotchbond Multiuso Plus cured [MPa] and the last one without photo-activation [MPd]. The GC analysis was performed in micro Raman, the AM with Caries Detector product and software Image J, the RU in a universal testing machine, the PF by eteroscopic magnifying glass and the NN in Scanning Electron Microscopy (MEV). GC, AM and RU data were analyzed by two-way analysis of variance and Tukey tests (p<0.05).  The other tests were qualitatively analyzed through descriptive statistics. Results: GC, unlike AM, did not change due to the region analyzed. In addition, MPf obtained the best performance for the GC and the worst for the AM and intermediate for the RU, while the MPd had balanced results for GC and AM and excellent performance in the RU. The predominant PF was adhesive failure. All the adhesive strategies used presented nanoinfiltration. Conclusions: The strategy without immediate photoactivation had balanced results, evidencing the value of this adhesive strategy to establish good physical properties to the final restoration.

MEMBROS DA BANCA:
Presidente - 2292784 - ISAUREMI VIEIRA DE ASSUNCAO
Interno - 1459400 - ADRIANA DA FONTE PORTO CARREIRO
Externo à Instituição - EMANUELLE DAYANA VIEIRA DANTAS - UNP