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Master's Dissertation
DOI
https://doi.org/10.11606/D.25.2017.tde-30112021-092421
Document
Author
Full name
Fernanda Sandes de Lucena
Institute/School/College
Knowledge Area
Date of Defense
Published
Bauru, 2017
Supervisor
Committee
Furuse, Adilson Yoshio (President)
Borges, Ana Flávia Sanches
Gonzaga, Carla Castiglia
Lisboa Filho, Paulo Noronha
Title in English
Influence of the addition of TiO2 nanotubes on the biocompatibility of Y-TZP ceramics and resin-based materials
Keywords in English
Adhesive
Biocompatibility
Resin Cement
TiO2 Nanotubes
Zirconia
Abstract in English
The aim of this in vitro study was to evaluate the biocompatibility of yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP), a resin-based cement (RelyX Ultimate) and a 10- MDP-based adhesive (Single Bond Universal) modified or not by titanium nanotubes (TiO2), by means of the MTT cell viability test and Crystal Violet. For this purpose, disks of 13 mm in diameter per 2 mm is thickness of pre-sintered Y-TZP zirconia (IPS e.max ZirCAD) were obtained. The resin-cement and a 10-MDP adhesive disks were obtained through a metal mold with the same dimensions. For Y-TZP, the incorporation of TiO2 nanotubes occured before sinterization, while for the resin-based materials 0.3wt% of nanotubes were added to the uncured materials. The specimens were divided into 8 groups (n = 8). The in vitro evaluation was carried out by means of tests in which fibroblast line NIH 3T3 cells were placed into indirect contact with these materials. For cell viability were made MTT assay tests and Crystal Violet in duplicate and after 24, 48 and 72 hours the absorbance levels were analyzed by spectrophotometry Elisa reader. The data obtained were submitted to two-way ANOVA, followed by Tukey test ( = 0.05). In the period of 72 the highest increases of absorbance happened for the groups Y-TZP without TiO2 nanotubes and adhesive with TiO2 nanotubes when compared to the other groups. In general, the incorporation of nanotubes into these materials did not interfere with cell viability in both tests.
Title in Portuguese
Influência da adição de nanotubos de TiO2 na biocompatibilidade de cerâmicas Y-TZP e de materiais a base de resina
Keywords in Portuguese
Adesivo
Biocompatibilidade
Cimento Resinoso
Nanotubos de TiO2
Zircônia
Abstract in Portuguese
O objetivo deste estudo in vitro foi avaliar a biocompatibilidade de uma zircônia tetragonal policristalina estabilizada por ítrio (Y-TZP), um cimento à base de resina (RelyX Ultimate) e um adesivo à base de 10-MDP (Single Bond Universal) modificados ou não por nanotubos de titânio (TiO2), por meio dos testes de viabilidade celular MTT e Cristal Violeta. Para este fim, foram obtidos discos de 13 mm x 2 mm de zircônia Y-TZP (IPS e.max ZirCAD). Os discos de cimento resinoso e adesivo com 10-MDP foram obtidos através de um molde metálico com as mesmas dimensões. Para Y-TZP, a incorporação de nanotubos de TiO2 ocorreu antes da sinterização, enquanto para os materiais à base de resina, 0,3% em peso de nanotubos foram adicionados antes da fotopolimerização. Os espécimes foram divididos em 8 grupos (n = 8). A avaliação in vitro foi feita através de testes nos quais as células da linhagem de fibroblastos NIH 3T3 foram colocadas em contato indireto com estes materiais. Para a viabilidade celular foram realizados MTT e Cristal Violeta em duplicata e após 24, 48 e 72 horas a absorbância foi analisada por espectrofotometria em leitora Elisa. Os dados obtidos foram submetidos a ANOVA a dois critérios, seguido do teste de Tukey ( = 0,05). Os resultados mostraram que em 24 e 48 hs todos os materiais mostraram-se biocompatíveis. No período de 72 hs os maiores aumentos de absorbância aconteceram para os grupos Y-TZP sem nanotubos de TiO2 e adesivo com nanotubos de TiO2 comparados aos demais grupos. De modo geral, a incorporação de nanotubos a estes materiais não interferiu na viabilidade celular em ambos os testes.
 
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Publishing Date
2021-11-30
 
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