Banca de QUALIFICAÇÃO: APARECIDA THARLLA LEITE DE CALDAS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : APARECIDA THARLLA LEITE DE CALDAS
DATE: 26/08/2020
TIME: 16:30
LOCAL: PLATAFORMA REMOTA
TITLE:

SEMI-DIRECT RESTORATIONS MADE WITH COMPOSITE RESINS WITH ADDITION OF ZIRCONIA AND DIATOMITE: IN VITRO EVALUATION OF MECHANICAL PROPERTIES

KEY WORDS:

 

 

Composite Resins, Mechanical Stress, Mouth Rehabilitation, Dental Restoration Failure.

 

PAGES: 32
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUBÁREA: Clínica Odontológica
SUMMARY:

INTRODUCTION: The incorporation of filler particles in composite resins has the role of improving their physical and mechanical properties, providing greater resistance to restorations. Many composites have nanoparticles incorporated into their composition, such as quartz, zirconia, silica and, more recently, diatomite, which is a sedimentary rock rich in silica. The addition of these nanoparticles seeks to increase the surface area and promote greater interaction with the organic matrix. OBJECTIVES: This study aimed to evaluate bond strength (RU), failure pattern (PF), polymerization depth (PP), flexural strength (RF) and elastic modulus (ME) of conventional and single-increment composite resins with addition zirconia and diatomite in semi-direct restorations. METHODS: Trunk-cone cavities with high C-factor (2.2) were created in dentin of bovine incisors (N = 68). Semi-direct restorations (n= 17) were made using resins: Bulk Fill (BF) (3M ESPE®), Z250 XT Resin (Z250XT) (3M ESPE®), Zirconfill Resin (ZF) (BM4®) and Z350 XT Resin ( Z350XT) (3M ESPE®), cemented with RelyX Ultimate self-etching dual resin cement (3M ESPE®), then the RU and PP tests were performed. For the RF and ME tests, using a silicone matrix, standard toothpicks (10mm x 1mm high x 2mm) were made for each tested resin (n = 10). RESULTS: For RF and ME Z250XT obtained a statistically higher value than ZF. For RU and PP, no statistically significant differences were found between the study groups. CONCLUSION: The addition of zirconia and diatomite nanoparticles did not influence the RU and PP of conventional and single-increment composite resins, however in the RF and ME tests there was a difference between the resins, where the resin with diatomite added lower values.

BANKING MEMBERS:
Presidente - 2292784 - ISAUREMI VIEIRA DE ASSUNCAO
Externo ao Programa - 1645492 - ALEX JOSE SOUZA DOS SANTOS
Externo à Instituição - ISABELA PINHEIRO CAVALCANTI LIMA - UERN