39 results on '"Feitosa, Sabrina"'
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2. Stepwise stress testing of different CAD-CAM lithium disilicate veneer application methods applied to lithium disilicate substructures
- Author
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May, Jaren T., Arata, Anelyse, Cook, Norman B., Diefenderfer, Kim E., Lima, Nelson B., Borges, Alexandre L.S., and Feitosa, Sabrina
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- 2022
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3. Iron cellular uptake from almond and coconut beverages using an in vitro intestinal cell model
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Silva, Joyce Grazielle Siqueira, Feitosa, Sabrina, Pallone, Juliana Azevedo Lima, Greiner, Ralf, and Briviba, Karlis
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- 2022
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- View/download PDF
4. Teoria e Prática Multidisciplinar em Saúde - Volume 2
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CASTRO, Antonia T B, primary, MESQUITA, Anna L M, additional, SILVA, Maria A M da, additional, RODRIGUES, Antônio B do N, additional, UCHÔA, Lucas R, additional, ALMEIDA, Caroline R de, additional, SOARES, Thalia M de S, additional, ANANIAS, Lucas, additional, BARROS, Antonio C M, additional, AMORIM, Marineide R do, additional, BORGES, Maria A A, additional, GUIMARÃES, Kayra C, additional, SANTOS, José M da S, additional, SANTOS, Almir O dos, additional, MONTEIRO, Rayane M M, additional, COSTA, Davi J S da, additional, SAMPAIO, Fernanda M A, additional, MELO, Eveny S, additional, BACELOR, Rafael G A, additional, NASCIMENTO, Maria da P S do, additional, S JÚNIOR, João F de, additional, LIMA, Isabel C da P, additional, TÔRRES, Victor L F, additional, MURATORI, Maria C S, additional, IANIEILI, Juliane A, additional, S FILHO, José H, additional, SANTOS, Eldo J R dos, additional, DIAS, Gilmara F, additional, LIMA, Cristiane E G, additional, COSTA, Artur de S, additional, RODRIGUES, Karina dos S, additional, SOUSA, Marília da S, additional, PACHECO, Gabriella, additional, TÔRRES, Gislene C M, additional, S JÚNIOR, Francisco E da, additional, COSTA, Mara J M, additional, ROCHA, Simone R, additional, LIMA, Lara R, additional, LIRA, Larissa R, additional, OLIVEIRA, Ana K S de, additional, OLIVEIRA, Maria G de S, additional, MOURA, Rita de C D, additional, BORGES, Francisca E de S, additional, MESQUITA, Nerley P, additional, MACEDO, Glauber B, additional, LUZ, Alyne L de A, additional, MACEDO, Juliana B, additional, CARVALHO, Maria A M de, additional, A NETO, Napoleão M, additional, RODRIGUES, HuannaW S, additional, BEZERRA, Dayseanne O, additional, SILVA, Elis R D de F S, additional, LEITE, Yulla K de C, additional, SILVA, Lucilene dos S, additional, CARVALHO, Marina S, additional, MELO, Wanderson G G de, additional, SOUSA, Ingridy R S e, additional, PEREIRA, Kaliny V dos Santos Alves, additional, LIMA, Nadiela F da S, additional, LIMA, Maria L A, additional, SANTOS, Thaís A G dos, additional, SOUSA, Antônia S de J, additional, MOREIRA, Thereza M M, additional, RANGEL, Pedro F de A, additional, MAIA, Rodrigo da S, additional, OLIVEIRA, Milena F de, additional, NASCIMENTO, Radames C do, additional, NASCIMENTO, Davi D de S do, additional, COUTO, Ricardo N, additional, SILVA, Paulo G N da, additional, CARVALHO, Thayro Andrade, additional, LIMA, Rafaela P, additional, LIMA, Emanuel W C, additional, OLIVEIRA, Lairton B de, additional, SILVA, Antonia F R da, additional, SOARES, Raynnã da S, additional, GUEDES, Raíssa F, additional, GUEDES, Ravena F, additional, SILVA, Janicélia A da, additional, SILVA, Jackeline R da, additional, SILVA, Cássia B, additional, MACHADO, Felicianna C F, additional, AMORIM, Hugo de A de, additional, SOUSA, Denise C de, additional, M JUNIOR, Antônio A N, additional, GONÇALVES, Larissa M F, additional, LIMA, Wagner C, additional, S FILHO, Manoel L da, additional, LOURENÇO, Maria L M C, additional, COSTA, Samily M da, additional, BORGES, Kelly P, additional, CASTRO, Larissa L, additional, SOUZA, Sara C de, additional, MASCARENHAS, Márcio D M, additional, GOMES, Luan E P A, additional, GOMES, Artur B, additional, CASTRO, Ana J R de S, additional, S JÚNIOR, Jorge R dos, additional, BARRETO, Jaderson D, additional, SOUSA, Jailton de C, additional, MOURA, Maria N de S, additional, MOREIRA, Nádia K G, additional, SOARES, Tiago, additional, SANTOS, Ardilles J C A dos, additional, CELESTINO, Luane da S, additional, MOTA, Ana C G, additional, VIANA, Jacihelen de F F, additional, CALOU, Irma B P, additional, RODRIGUES, Raissa A L, additional, OLIVEIRA, Amanda P de, additional, FERREIRA, Jacyara A F, additional, SANTOS, Camila C, additional, SAMPAIO, Juciele A, additional, SOUZA, Renato D S, additional, MOURA, Ana B de M, additional, GALLAS, ANA KELMA CUNHA, additional, RIBEIRO, Jhonata de C, additional, LIMA, Eduardo B A de, additional, MELO, Antonia T B de, additional, ALCÂNTARA, Priscila L, additional, SILVA, Eliakim A da, additional, SANTOS, Beatriz G F dos, additional, SOUSA, João B de C, additional, BARROS, Kamilla A dos S, additional, A JÚNIOR, José da S, additional, CAMPELO, Lany L de C R, additional, ALENCAR, Rayane da S, additional, SILVA, Mariana R, additional, VIEIRA, Camilla A L, additional, FURTADO, Luis Achilles Rodrigues, additional, SANTOS, Pamella S B G, additional, NEVES, Nara A, additional, BRITO, Matheus G M, additional, RABELO, Bruno A S, additional, S NETO, Benedito M da, additional, LIMA, Anali L, additional, REIS, THAIS SILVA DOS, additional, CARVALHO, Maria de L, additional, FERREIRA, Raquel, additional, JACINTO, Jaciane S, additional, SOUZA, Thaynara N, additional, SILVA, Jéssica B, additional, TEIXEIRA, Ana L Soares, additional, PONTES, Orleandra P, additional, BOGEA, Eduarda G, additional, NOGUEIRA, Ana L A, additional, AMORIM, Thiago E de, additional, ANDRADE, Felipe J da C, additional, CASTRO, Vanessa, additional, SANTOS, Leticya R dos, additional, MINEIRO, Ana L B B, additional, SANTOS, Allan S da S, additional, SILVA, Ravena C, additional, NÓBREGA, Maria M G P, additional, B JÚNIOR, Aloísio S de, additional, ROSA, Vitória J P, additional, SILVA, Karlla E de O, additional, SILVA, Aline de C, additional, SIPAÚBA, Alana J C, additional, RODRIGUES, Lareska S, additional, SOUSA, Maria V A de, additional, BRITO, Maria I, additional, SOUSA, Luis F A, additional, PEREIRA, Amanda L N, additional, RODRIGUES, Adna A, additional, BRITO, Josiana A B, additional, SILVA, Lívia M de O, additional, AGUIAR, Mary K de S, additional, GUIMARÃES, Milena B, additional, MAGALHÃES, Lívia M S L, additional, MARINHO, Vitória D B, additional, MATIAS, Mara R de S S, additional, CARDOSO, Ester N, additional, CUNHA, Nayra C S, additional, FEITOSA, Sabrina F de S, additional, BEZERRA, Thalisson W de A, additional, COSTA, Maria S A, additional, VASCONCELOS, Ana D B de, additional, SOUSA, Antonio M B de, additional, COSTA, Alexia L, additional, LUCAS, Yandra C dos R, additional, ALENCAR, Victória Y C, additional, BEZERRA, Juliana B, additional, BORGES, Ana C do N, additional, DUARTE, Ennya C P dos S, additional, SILVA, Baldomero A K da, additional, FARIAS, Raynara V, additional, AMÉRICO, Priscila da S, additional, NASCIMENTO, Eliane C do, additional, AGUIAR, Leiliane C de, additional, LIMA, Cleison B M, additional, REI, Cinthia M dos, additional, RODRIGUES, Lauanne C, additional, GONÇALVES, Ludmila O, additional, ALBUQUERQUE, Kelson L B de, additional, MACHADO, Maria das G da S, additional, SILVA, Viviane O da, additional, ARAUJO, Ana G S de, additional, FERNANDES, Nelciane de S, additional, GALIZA, Francisca T de, additional, SANTANA, Raissa de, additional, SILVA, Tátila D de S, additional, LEAL, Evaldo S, additional, CARVALHO, Luiza S A C, additional, COSTA, Daynara D de O, additional, LULA, Carlos E O, additional, ALVES, Emmanuele de J B S, additional, CABRAL, Nithelly O, additional, CARVALHO, Amanda A M de, additional, CABRAL, Natália de S, additional, SILVA, Maria A F da, additional, LIMA, Iasmim M, additional, OLIVEIRA, Josiane da S, additional, CABRAL, Maria F de S O, additional, LIMA, Ana R N, additional, LIMA, Monica N de, additional, BRITO, Rayane M, additional, SOUZA, Francisca T P de, additional, SOUSA, Francisca C de, additional, SILVA, Danielle P da, additional, ALMEIDA, Márcio A de, additional, P JÚNIOR, Murilo R, additional, LUCENA, Valéria G, additional, ROCHA, Tainá A, additional, CAROLINO, Paula H F, additional, LEAL, Nara M P, additional, MARTINS, Francisco O da S, additional, RAMOS, Maria A de S, additional, ANDRADE, Lorena M V de, additional, NASCIMENTO, Maria D A do, additional, IANICELI, Juliana A, additional, NÓBREGA, Maria M G P, additional, SOUSA, Paulo Cilas de C, additional, SILVA, Ana Roberta V da, additional, EVERTON, Tomazia D Ewerton e, additional, LOPES, Everton M, additional, OLIVEIRA, Beatris G S, additional, BÓGEA, Brenda V, additional, OLIVEIRA, Conceição N D de, additional, SOARES, Elaine de S, additional, FARAH, Emanuelli I, additional, TORRES JUNIOR, Francisco das C S, additional, SIMAS, Gislayne S, additional, SILVA, Guilherme S de Morais, additional, PIRES, Hellen C V, additional, OLIVEIRA, Isma B de, additional, OLIVEIRA, Jullyana O G de, additional, VERAS, Keila de Brito, additional, ARAÚJO, Laíme A N de, additional, L, Larissa da S, additional, SILVA, Luana T da, additional, ALMEIDA, Lynlanda M C de, additional, MARTINS, Maria do L, additional, SILVA, Maria J da, additional, NASCIMENTO, Maria P S, additional, SANTOS, Mariana P A, additional, RIPARDO, Maynara L, additional, GUIMARÃES, Milenna B, additional, MEDEIROS, Natalee da S, additional, CRUZ, Priscila M da, additional, CARVALHO, Rebeca de Jesus M de, additional, DAMASCENO, Sabrina G B, additional, ROCHA, Sheila M R, additional, LIMA, Tayane A, additional, and COSTA, Dayana Dourado de Oliveira, additional
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- 2020
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5. Clindamycin-modified Triple Antibiotic Nanofibers: A Stain-free Antimicrobial Intracanal Drug Delivery System
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Karczewski, Ashley, Feitosa, Sabrina A., Hamer, Ethan I., Pankajakshan, Divya, Gregory, Richard L., Spolnik, Kenneth J., and Bottino, Marco C.
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- 2018
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6. CONTRIBUIÇÕES DAS PRÁTICAS INTEGRATIVAS E COMPLEMENTARES NO TRABALHO DE PARTO E PARTO: REVISÃO INTEGRATIVA DA LITERATURA
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ARAUJO, Dannyele Dias, primary, SOBRAL, Karynne Santos, additional, FEITOSA, Sabrina Arruda Campos, additional, and COSTA, Sandra Helena de Lima Pereira, additional
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- 2023
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7. Physical, Mechanical, and Anti‐Biofilm Formation Properties of CAD‐CAM Milled or 3D Printed Denture Base Resins: In Vitro Analysis
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Freitas, Rodrigo Falcão Carvalho Porto de, primary, Duarte, Simone, additional, Feitosa, Sabrina, additional, Dutra, Vinicius, additional, Lin, Wei‐Shao, additional, Panariello, Beatriz Helena Dias, additional, and Carreiro, Adriana da Fonte Porto, additional
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- 2022
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8. Influence of convergence angle of tooth preparation on the fracture resistance of Y-TZP-based all-ceramic restorations
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Corazza, Pedro Henrique, Feitosa, Sabrina Alves, Borges, Alexandre Luiz Souto, and Della Bona, Alvaro
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- 2013
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9. Physical, Mechanical, and Anti‐Biofilm Formation Properties of CAD‐CAM Milled or 3D Printed Denture Base Resins: In Vitro Analysis.
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Freitas, Rodrigo Falcão Carvalho Porto de, Duarte, Simone, Feitosa, Sabrina, Dutra, Vinicius, Lin, Wei‐Shao, Panariello, Beatriz Helena Dias, and Carreiro, Adriana da Fonte Porto
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DENTURES ,CAD/CAM systems ,CONTACT angle ,COMPLETE dentures ,COMPUTER-aided design - Abstract
Purpose: To investigate surface characteristics (roughness and contact angle), anti‐biofilm formation, and mechanical properties (mini‐flexural strength) of computer‐aided design and computer‐aided manufacturing (CAD‐CAM) polymethylmethacrylate (PMMA) polymer, and three‐dimensional (3D) printed resin for denture base fabrication compared with conventional heat polymerized denture base resins. Materials and methods: A total of 60 discs and 40 rectangular specimens were fabricated from one CAD‐CAM (AvaDent), one 3D printed (Cosmos Denture), and two conventional heat polymerized (Lucitone 199 and VipiWave) materials for denture base fabrication. Roughness was determined by Ra value; the contact angle was measured by the sessile drop method. The biofilm formation inhibition behavior was analyzed through Candida albicans adhesion, while mini‐flexural strength test was done using a three‐point bending test. The data were analyzed using descriptive and analytical statistics (α = 0.05). Results: The CAD‐CAM PMMA group showed the lowest C. albicans adhesion (log CFU/mL: 3.74 ± 0.57) and highest mini‐flexural strength mean (114.96 ± 16.23 MPa). 3D printed specimens presented the highest surface roughness (Ra: 0.317 ± 0.151 μm) and lowest mini‐flexural strength values (57.23 ± 9.07 MPa). However, there was no statistical difference between CAD‐CAM PMMA and conventional groups for roughness, contact angle, and mini‐flexural strength. Conclusions: CAD‐CAM milled materials present surface and mechanical properties similar to conventional resins and show improved behavior in preventing C. albicans adhesion. Nevertheless, 3D printed resins present decreased mini‐flexural strength. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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10. Fracture Resistance Behaviors of Titanium‐Zirconium and Zirconia Implants
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Hanes, Brenda, primary, Feitosa, Sabrina, additional, Phasuk, Kamolphob, additional, Levon, John A., additional, Morton, Dean, additional, and Lin, Wei‐Shao, additional
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- 2021
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11. Influence of Toothbrush Abrasion and Surface Treatments on Roughness and Gloss of Polymer-Infiltrated Ceramics
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Labban, Nawaf, primary, Al Amri, Mohammad D., additional, Alnafaiy, Sarah M., additional, Alhijji, Saleh M., additional, Alenizy, Mohammad A., additional, Iskandar, Mounir, additional, and Feitosa, Sabrina, additional
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- 2021
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12. Effect of a chlorhexidine-encapsulated nanotube modified pit-and-fissure sealant on oral biofilm
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FEITOSA, Sabrina, primary, CARREIRO, Adriana F. P., additional, MARTINS, Victor M., additional, PLATT, Jeffrey A., additional, and DUARTE, Simone, additional
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- 2021
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13. Fracture Resistance Behaviors of Titanium‐Zirconium and Zirconia Implants.
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Hanes, Brenda, Feitosa, Sabrina, Phasuk, Kamolphob, Levon, John A., Morton, Dean, and Lin, Wei‐Shao
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DENTAL crowns ,ZIRCONIUM oxide ,COMPRESSION loads ,DEAD loads (Mechanics) ,PEAK load - Abstract
Purpose: To evaluate the fracture resistance behaviors of titanium‐zirconium, one‐piece zirconia, and two‐piece zirconia implants restored by zirconia crowns and different combinations of abutment materials (zirconia and titanium) and retention modes (cement‐retained and screw‐retained zirconia crowns). Material and Methods: Three research groups (n=12) were evaluated according to combinations of abutment material, retention mode, and implant type. In the control group (TTC), titanium‐zirconium implants (∅ 4.1 mm RN, 12 mm, Roxolid; Straumann USA, Andover, MA) and prefabricated titanium abutments (RN synOcta Cementable Abutment, H 5.5 mm; Straumann USA) were used to support cement‐retained zirconia crowns. In the second group (ZZC), one‐piece zirconia implants (PURE Ceramic Implant Monotype, ∅ 4.1 mm RD, 12 mm, AH 5.5 mm; Straumann USA) were used to support cement‐retained zirconia crowns. In the third group (ZTS), two‐piece zirconia implants (PURE Ceramic Implant, ∅ 4.1 mm RD, 12 mm) and prefabricated titanium abutments (CI RD PUREbase Abutment, H 5.5 mm) were used to support screw‐retained zirconia crowns. All zirconia crowns were manufactured in the same anatomic contour with a 5‐axis dental mill and blended 3 and 5 mol% yttria‐stabilized zirconia (LayZir A2). Implants were inserted into specimen holders made of epoxy resin‐glass fiber composite. All specimens were then subject to artificial aging in an incubator at 37°C for 90 days. Fracture resistance of specimen assemblies was tested under static compression load using the universal testing machine based on ISO14801 specification. The peak fracture loads were recorded. All specimens were examined at the end of the test microscopically at 5× and 10× magnification to detect any catastrophic failures. Comparisons between groups for differences in peak fracture load were made using Wilcoxon Rank Sum tests and Weibull and Kaplan‐Meier survival analyses (α = 0.05). Results: The TTC group (942 ± 241 N) showed significantly higher peak fracture loads than the ZZC (645 ± 165 N) and ZTS (650 ± 124 N) groups (p < 0.001), while there was no significant difference between ZZC and ZTS groups (p = 0.940). The survival probability based on the Weibull and Kaplan‐Meier models demonstrated different failure molds between titanium‐zirconium and zirconia implants, in which the TTC group remained in the plastic strain zone for a longer period before fracture when compared to ZZC and ZTS groups. Catastrophic failures, with implant fractures at the embedding level or slightly below, were only observed in the ZZC and ZTS groups. Conclusions: Cement‐retained zirconia crowns supported by titanium‐zirconium implants and prefabricated titanium abutments showed superior peak fracture loads and better survival probability behavior. One‐piece zirconia implants with cement‐retained zirconia crowns and two‐piece zirconia implants with screw‐retained zirconia crowns on prefabricated titanium abutment showed similar peak fracture loads and survival probability behavior. Titanium‐zirconium and zirconia implants could withstand average intraoral mastication loads in the incisor region. This study was conducted under static load, room temperature (21.7°C), and dry condition, and full impacts of intraoral hydrothermal aging and dynamic loading conditions on the zirconia implants should be considered and studied further. [ABSTRACT FROM AUTHOR]
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- 2022
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14. Resin-based dental materials containing 3-aminopropyltriethoxysilane modified halloysite-clay nanotubes for extended drug delivery
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Karczewski, Ashley, primary, Kalagi, Sara, additional, Viana, Ítallo Emídio Lira, additional, Martins, Victor Mota, additional, Duarte, Simone, additional, Gregory, Richard L., additional, P. Youngblood, Jeffrey, additional, Platt, Jeffrey A., additional, and Feitosa, Sabrina, additional
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- 2021
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15. Influence of toothbrush abrasion and surface treatments on the color and translucency of resin infiltrated hybrid ceramics
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Labban, Nawaf, primary, Al Amri, Mohammad, additional, Alhijji, Saleh, additional, Alnafaiy, Sarah, additional, Alfouzan, Afnan, additional, Iskandar, Mounir, additional, and Feitosa, Sabrina, additional
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- 2021
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16. Effect of the addition of silanated silica on the mechanical properties of microwave heat-cured acrylic resin
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da Silva, Lucas H., Feitosa, Sabrina A., Valera, Marcia C., de Araujo, Maria A.M., and Tango, Rubens N.
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- 2012
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17. Chlorhexidine-modified nanotubes and their effects on the polymerization and bonding performance of a dental adhesive
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Kalagi, Sara, primary, Feitosa, Sabrina A., additional, Münchow, Eliseu A., additional, Martins, Victor M., additional, Karczewski, Ashley E., additional, Cook, N. Blaine, additional, Diefenderfer, Kim, additional, Eckert, George J., additional, Geraldeli, Saulo, additional, and Bottino, Marco C., additional
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- 2020
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18. Novel fluoride and stannous -functionalized β-tricalcium phosphate nanoparticles for the management of dental erosion
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Viana, Ítallo Emídio Lira, primary, Lopes, Raquel Marianna, additional, Silva, Flávia Rodrigues Oliveira, additional, Lima, Nelson Batista, additional, Aranha, Ana Cecília Corrêa, additional, Feitosa, Sabrina, additional, and Scaramucci, Taís, additional
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- 2020
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19. Contributors
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Bennett, Jeffrey D., Bojrab, Mathew David, Chin, Judith, Cortes-Pona, Lilly, Dean, Jeffrey A., Donly, Kevin, Edelstein, Burton L., Emhardt, John D., Feitosa, Sabrina, Ferguson, Donald J., Ferneini, Elie M., Flores, Roberto, Hall, Tasha, Hartsfield, James Kennedy, Jr., Hege, Kerry, Hughes, Christopher V., John, Vanchit, Jones, James Earl, Kattadiyil, Mathew Thomas, Klene, Carrie, Kowolik, Joan Elizabeth, Krull, George, Krull, John T., Manaloor, John J., Martinez Mier, E. Angeles, Maxey, Hannah L., Morford, Lorri Ann, Nakar, Charles, Platt, Jeffrey A., Romito, Laura Marie, Sanders, Brian, Saxen, Mark, Scully, Allison, Shapiro, Amy D., Shin, Daniel, Soltanzadeh, Pooya, Spolnik, Kenneth J., Stigers, Jenny, Stoeckel, Dan, Thompson, Shannon, Turner, Erwin G., Ureña-Cirett, Jose Luis, Walker Vinson, LaQuia, Walsh, John, Weir, Julie, Yassen, Ghaeth, and Yepes, Juan Fernando
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- 2022
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20. Effects of different storage conditions on the oxidative stability of crude and refined palm oil, olein and stearin (Elaeis guineensis)
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ALMEIDA, Deusdélia Teixeira de, primary, VIANA, Thaís Vieira, additional, COSTA, Mariana Melo, additional, SILVA, Cintia de Santana, additional, and FEITOSA, Sabrina, additional
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- 2019
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21. Pressable Feldspathic Inlays in Premolars: Effect of Cementation Strategy and Mechanical Cycling on the Adhesive Bond Between Dentin and Restoration.
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Alves Feitosa, Sabrina, Corazza, Pedro Henrique, Cesar, Paulo Francisco, Bottino, Marco Antonio, and Valandro, Luiz Felipe
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INLAYS (Dentistry) ,BICUSPIDS ,DENTAL cements ,DENTIN ,DENTAL bonding ,FINITE element method ,STRESS concentration ,HYDROFLUORIC acid - Abstract
Purpose: To evaluate the effect of the cementation strategy and mechanical cycling (MC) on the microtensile bond strength (MTBS) of feldspathic inlays cemented to premolars. Materials and Methods: Forty-eight human premolars were prepared and porcelain inlays were produced. Specimens were allocated into 3 groups, based on the cementation strategy: 1) conventional adhesive cementation (RelyX ARC, 3M ESPE): application of etch-and-rinse single bottle adhesive to dentin / ceramic surface treated with hydrofluoric acid (HF) and silane (S) / cementation with resin cement; 2) simplified cementation using a self-adhesive resin cement (RelyX U100, 3M ESPE); 3) modified simplified cementation using a self-adhesive resin cement (RelyX U100, 3M ESPE) with HF+S treatment. Half of the specimens from each group were submitted to MC (2x10
6 pulses, frequency = 4 Hz, load = 100 N). Each specimen was serially sliced for MTBS and the failures were classified. The stress distribution analysis using FEA was verified. Results: All of the bar-samples from G2 were lost during cutting of the specimens. Mechanical-cycling had no significant effect on bond strength, whereas cementation strategy significant affected MTBS results. The most common type of failure was cohesive of cement. FEA showed that stresses were concentrated mainly at the loading region going up to the root fixation. Conclusion: Porcelain inlays cemented with conventional resin cement or self-adhesive resin cement should be associated with ceramic surface treatment. FEA showed the most critical zone for failure is located in the cement region close to the marginal crest. [ABSTRACT FROM AUTHOR]- Published
- 2014
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22. Fatigue Failure Load of Lithium Disilicate Restorations Cemented on a Chairside Titanium‐Base.
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Kaweewongprasert, Peerapat, Phasuk, Kamolphob, Levon, John A., Eckert, George J., Feitosa, Sabrina, Valandro, Luiz F., Bottino, Marco C., and Morton, Dean
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RARE earth oxides ,ONE-way analysis of variance ,HYDROFLUORIC acid ,STRUCTURAL reliability - Abstract
Purpose: To evaluate the fatigue failure load of distinct lithium disilicate restoration designs cemented on a chairside titanium base for maxillary anterior implant‐supported restorations. Materials and Methods: A left‐maxillary incisor restoration was virtually designed and sorted into 3 groups: (n = 10/group; CTD: lithium disilicate crowns cemented on custom‐milled titanium abutments; VMLD: monolithic full‐contour lithium disilicate crowns cemented on a chairside titanium‐base; VCLD: lithium disilicate crowns bonded to lithium disilicate customized anatomic structures and then cemented onto a chairside titanium base). The chairside titanium base was air‐abraded with aluminum oxide particles. Subsequently, the titanium base was steam‐cleaned and air‐dried. Then a thin coat of a silane agent was applied. The intaglio surface of the ceramic components was treated with 5% hydrofluoric acid (HF) etching gel, followed by silanization, and bonded with a resin cement. The specimens were fatigued at 20 Hz, starting with a 100 N load (5000× load pulses), followed by stepwise loading from 400 N up to 1400 N (200 N increments) at a maximum of 30,000 cycles each. The failure loads, number of cycles, and fracture analysis were recorded. The data were statistically analyzed using one‐way ANOVA, followed by pairwise comparisons (p < 0.05). Kaplan‐Meier survival plots and Weibull survival analyses were reported. Results: For catastrophic fatigue failure load and the total number of cycles for failure, VMLD (1260 N, 175,231 cycles) was significantly higher than VCLD (1080 N, 139,965 cycles) and CDT (1000 N, 133,185 cycles). VMLD had a higher Weibull modulus demonstrating greater structural reliability. Conclusion: VMLD had the best fatigue failure resistance when compared with the other two groups. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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23. Effect of the bonding strategy on the tensile retention of full-contour zirconia crowns
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Feitosa, Sabrina A., primary, Campos, Fernanda, additional, Yoshito, Walter Kenji, additional, Lazar, Dolores R.R., additional, Ussui, Valter, additional, Valandro, Luiz Felipe, additional, Bottino, Marco A., additional, and Bottino, Marco C., additional
- Published
- 2018
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24. Physicochemical and biological properties of novel chlorhexidine‐loaded nanotube‐modified dentin adhesive
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Feitosa, Sabrina A., primary, Palasuk, Jadesada, additional, Geraldeli, Saulo, additional, Windsor, Lester Jack, additional, and Bottino, Marco C., additional
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- 2018
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25. Effect of Traditional Household Processes on Iron, Zinc and Copper Bioaccessibility in Black Bean (Phaseolus vulgaris L.)
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Feitosa, Sabrina, primary, Greiner, Ralf, additional, Meinhardt, Ann-Katrin, additional, Müller, Alexandra, additional, Almeida, Deusdélia, additional, and Posten, Clemens, additional
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- 2018
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26. Fatigue Failure Load of Lithium Disilicate Restorations Cemented on a Chairside Titanium‐Base
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Kaweewongprasert, Peerapat, primary, Phasuk, Kamolphob, additional, Levon, John A., additional, Eckert, George J., additional, Feitosa, Sabrina, additional, Valandro, Luiz F., additional, Bottino, Marco C., additional, and Morton, Dean, additional
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- 2018
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27. INFLUÊNCIA DA CONCENTRAÇÃO E DO TEMPO DE CONDICIONAMENTO COM ÁCIDO HIDROFLUORÍDRICO NA RUGOSIDADE E MORFOLOGIA SUPERFICIAL DE UMA ZIRCÔNIA GLAZEADA
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CAMPOS, Fernanda, primary, PEREIRA, Sarina Maciel Braga, additional, FEITOSA, Sabrina Alves, additional, VALANDRO, Luiz Felipe, additional, BOTTINO, Marco Antonio, additional, and SOUZA, Rodrigo Othavio de Assunção, additional
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- 2018
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28. Bonding strategies to full-contour zirconia: Zirconia pretreatment with piranha solution, glaze and airborne-particle abrasion
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Feitosa, Sabrina A., primary, Lima, Nelson B., additional, Yoshito, Walter K., additional, Campos, Fernanda, additional, Bottino, Marco A., additional, Valandro, Luiz F., additional, and Bottino, Marco C., additional
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- 2017
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29. EFEITO DA FRITURA DE ACARAJÉ NA COMPOSIÇÃO DE CAROTENOIDES E ATIVIDADE ANTIOXIDANTE DE ÓLEO DE PALMA BRUTO
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Correia, Luciana Conceição Argôlo, primary, Feitosa, Sabrina, additional, De Matos, Débora Bahia, additional, and De Almeida, Deusdélia Teixeira, additional
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- 2017
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30. Caracterização de uma cerâmica 3Y-TZP e avaliação do efeito de tratamentos de superfície na adesão da cerâmica ao glaze ou cimento resinoso
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Feitosa, Sabrina Alves [UNESP], Universidade Estadual Paulista (Unesp), and Bottino, Marco Antonio [UNESP]
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Dental materials ,Adesão ,Materiais dentários ,Cimentos de resina ,Cisalhamento - Abstract
Made available in DSpace on 2015-06-17T19:33:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-02-12. Added 1 bitstream(s) on 2015-06-18T12:48:09Z : No. of bitstreams: 1 000827138.pdf: 1409159 bytes, checksum: 0b9d93f3a376f761231d70d0d839d707 (MD5) O objetivo do presente estudo foi avaliar os parâmetros de adesão entre glaze e full-contour zirconia (FCZ) e FCZ glazeada e cimento resinoso. Zircônia e glaze tiveram as suas propriedades caracterizadas. Amostras de FCZ foram divididas em 5 grupos: (GL) aplicação de glaze; (AL+GL) jateamento com óxido de alumínio + glaze; (CJ+GL) partículas de óxido de alumínio modificada por sílica (Cojet®) + glaze; (SP+GL) tratamento químico com solução piranha + glaze; (CJ) Cojet. Microscopia eletrônica de varredura (MEV) e de força atômica (MFA) foram realizadas para avaliar a topografia das amostras. Scratch test foi realizado para avaliar o tipo de união entre zircônia e glaze após os diferentes tratamentos [(GL), (AL), (CJ) e (SP). Durante a cimentação, os grupos glazeados [(GL), (AL+GL), (CJ+GL) e (SP+GL)] foram tratados com ácido fluorídrico (HF) e silano; e o grupo não glazeado (CJ) apenas com silano. O cimento resinoso foi unido à zircônia utilizando um dispositivo específico para o teste de cisalhamento (SBS). Para a realização do teste SBS, metade dos espécimes de cada tratamento foi ensaiada 24 h após a cimentação e a outra metade foi envelhecida (armazenagem e termociclagem). Para a avaliação da retenção, foram confeccionados coroas FCZ e preparos para coroa total em substrato de resina epóxica (G10) (simulando um dente). Os grupos que receberam tratamento na superfície interna da coroa [(GL), (CJ+GL), (SP+GL) e (CJ)] foram cimentados com cimento resinoso sem MDP (Multilink Automix, 3M). O grupo que não recebeu tratamento na superfície interna (PF) foi cimentado utilizando um cimento resinoso contendo MDP (Panavia F, Kuraray). Os dados de adesão foram analisados estatisticamente (ANOVA e Tukey test). A full-contour zirconia apresentou alta densidade, microestrutura homogênea e propriedades mecânicas comparáveis à zircônia tradicional. O glaze ... The aim of the present study was to evaluate the adhesive parameters between glaze and full-contour zirconia (FCZ) and overglazed FCZ and resin cement. Zirconia and glaze were tested to determined theirs properties. FCZ samples were divided into 5 groups: (GL) glaze application; (AL+GL) sandblasting with aluminum oxide + glaze; (CJ+GL) tribochemical silica coating (Cojet®) + glaze; (SP+GL) chemical surface treatment with piranha solution+glaze; (CJ) Cojet. Electron scanning microscopy (SEM) and atomic force microscopy (MFA) were performed to evaluate the FCZ topography. Scratch test was executed to evaluate the bonding between FCZ and glaze after the different surface pretreatment. For the bonding procedures the glazed groups [(GL), (AL+GL), (CJ+GL) and (SP+GL)] were etched with hydrofluoric acid (HF) and treated with a silane coupling agent and the group without glaze (CJ) was treated only with a silane. The resin cement was bonded to the zirconia surface using a dedicated device for the shear test (SBS). For the SBS test, half of the samples were tested after 24 h and the other half after storage and thermocycling. To evaluate the tensile retention of FCZ crowns cemented on epoxy resin (G10) specimens simulating fullcontour crowns were made. Pretreated groups [(GL), (CJ+GL), (SP+GL) and (CJ)] were bonded with a resin cement without MDP (Multilink Automix, 3M). The group without surface pretreatment (PF) was bonded with a MDP-based resin cement (Panavia F, Kuraray). The adhesive data were statistically analysed (ANOVA e Tukey test). FCZ showed high density, homogeneous microstructure and mechanical properties similar to the traditional zirconia. FCZ glaze was characterized as a leucite with irregular shape and size morphology. The scratch test pattern was similar for all the evaluated groups and classified as a cohesive failure of the glaze. The shear data suggested that the chemicall ...
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- 2015
31. Physicochemical and biological properties of novel chlorhexidine‐loaded nanotube‐modified dentin adhesive.
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Feitosa, Sabrina A., Palasuk, Jadesada, Geraldeli, Saulo, Windsor, Lester Jack, and Bottino, Marco C.
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A commercially available three‐step (etch‐and‐rinse) adhesive was modified by adding chlorhexidine (CHX)‐loaded nanotubes (Halloysite®, HNT) at two concentrations (CHX10% and CHX20%). The experimental groups were: SBMP (unmodified adhesive, control), HNT (SBMP modified with HNT), CHX10 (SBMP modified with HNT loaded with CHX10%), and CHX20 (SBMP modified with HNT loaded with CHX20%). Changes in the degree of conversion (DC%), Knoop hardness (KHN), water sorption (WS), solubility (SL), antimicrobial activity, cytotoxicity, and anti‐matrix metalloproteinase [MMP‐1] activity (collagenase‐I) were evaluated. In regards to DC%, two‐way ANOVA followed by Tukey's post‐hoc test revealed that only the factor "adhesive" was statistically significant (p < 0.05). No significant differences were detected in DC% when 20 s light‐curing was used (p > 0.05). For Knoop microhardness, one‐way ANOVA followed by the Tukey's test showed statistically significant differences when comparing HNT (20.82 ± 1.65) and CHX20% (21.71 ± 2.83) with the SBMP and CHX10% groups. All adhesives presented similar WS and cytocompatibility. The CHX‐loaded nanotube‐modified adhesive released enough CHX to inhibit the growth of S. mutans and L. casei. Adhesive eluates were not able to effectively inhibit MMP‐1 activity. The evaluation of higher CHX concentrations might be necessary to provide an effective and predictable MMP inhibition. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res B Part B, 2018. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 868–875, 2019. [ABSTRACT FROM AUTHOR]
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- 2019
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32. Influence of drying time of adhesive systems on the bond strength between resin cement and feldspathic ceramic
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Feitosa, Sabrina Alves, primary, Moura, Isabela Gomes, additional, Corazza, Pedro Henrique, additional, Bergolli, Cesar Dalmolin, additional, Pagani, Clóvis, additional, Souza, Rodrigo Othavio A, additional, and Valandro, Luiz Felipe, additional
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- 2016
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33. Synthesis and characterization of novel halloysite-incorporated adhesive resins
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Feitosa, Sabrina A., primary, Münchow, Eliseu A., additional, Al-Zain, Afnan O., additional, Kamocki, Krzysztof, additional, Platt, Jeffrey A., additional, and Bottino, Marco C., additional
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- 2015
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34. Restaurações inlays em cerâmicas feldspáticas injetadas em pré-molares: efeito da estratégia de cimentação e da ciclagem mecânica na resistência adesiva entre dentina e restauração
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Feitosa, Sabrina Alves [UNESP], Universidade Estadual Paulista (Unesp), and Bottino, Marco Antonio [UNESP]
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Restaurações intracoronárias ,Dental materials ,Dental cements ,Inlays ,Materiais dentários ,Dentin ,Finite element analysis ,Análise de elemento finito ,Cimentos dentarios ,Dentina ,Restauração (Odontologia) ,Resistência à tração ,Tensile strength - Abstract
Made available in DSpace on 2014-06-11T19:28:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-07-01Bitstream added on 2014-06-13T18:35:09Z : No. of bitstreams: 1 feitosa_sa_me_sjc.pdf: 1379753 bytes, checksum: 43ae15bd352aa2e18e8da1fc027dae7f (MD5) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) O estudo avaliou o efeito da estratégia de cimentação e da ciclagem mecânica na resistência de união entre dentina e restauração. O tipo de falha dos espécimes foi classificado e a distribuição de tensões foi analisada pela simulação utilizando o método de análise por elementos finitos (MEF). Quarenta e oito (N= 48) pré-molares superiores foram preparados (cavidade tipo MOD) e 48 restaurações inlays de cerâmica feldspática foram obtidas. Os espécimes foram alocadas em 3 grupos, considerando a estratégia de cimentação (N= 16): 1- convencional (Grupos 1 e 2): sistema adesivo condicionamento total de passo único (tratamento da dentina), tratamento da superfície cerâmica com ácido fluorídrico (HF) e silano (S), e cimentação com cimento resinoso; 2- estratégia simplificada (grupos 3 e 4) utilizando o cimento resinoso autoadesivo RelyX U100 (3M) sem tratamento das superfícies da dentina e da cerâmica; 3- estratégia simplificada modificada (grupos 5 e 6) utilizando o cimento resinoso RelyX U100 associado ao tratamento de superfície com HF+S. Os dentes dos grupos 2, 4 e 6 não foram ciclados, enquanto que aqueles dos grupos 1, 3 e 5 foram submetidos a ciclagem mecânica (CM): 2.000.000 pulsos, carga de 100N sobre as cúspides (a restauração não recebeu carga), a 37 oC. Cada espécime foi seccionado de forma seriada para produzir corpos de prova em forma de barras dente-restauração-dente para serem submetidas ao teste de microtração. A região da fratura de cada espécime foi analisada e classificada. A distribuição de tensões em um modelo virtual simulando as condições do estudo in vitro, pelo método de elementos finitos, foi verificada. A Análise de Variância mostrou que: o efeito interação dos fatores não foi estatisticamente significante (a alteração da resistência de união em razão da ciclagem mecânica (CM) para a Estratégia... The study evaluated the effect of the bonding strategy and mechanical cycling on the bond strength between dentin and inlay restoration. The specimens failure mode and stress distribution (Finite element analysis FEA) was analyzed. Forty-eight (n = 48) pre-molars were prepared (MOD cavity) and 48 feldspathic ceramic inlays restorations were obtained. Specimens (tooth-restoration) were allocated into three groups considering the bonding strategy (n = 16): 1 - Conventional (groups 1 and 2): one-step total etch adhesive system (dentin treatment), hydrofluoric acid (HF) and silane (S) ceramic surface treatment, cementation with resin cement, 2 - Simplified (groups 3 and 4): RelyX U100 (3M) adhesive resin cement without dentin and ceramic surface treatment; 3 - Simplified modified (groups 5 and 6): RelyX U100 associated with HF + surface treatment. Specimens from groups 1, 3 and were subjected to mechanical cycling (CM) - 2,000,000 pulses, 100N on the cusp, 37ºC. Each specimen was sectioned to produce tooth-restoration-tooth bars specimens (cross-sectional area: 1mm2) that were submitted to microtensile bond strength test. The fractured area of each specimen was analyzed. Stress distribution was analyzed by a virtual model simulating the in vitro study by FEA. Variance analysis showed that: factors effect interaction was not statistically significant (there was no statistically differences between strength bond values with CM from groups 1 and 3). Strategy effect was statistically significant (strategy 3 mean strength bond [5.59 MPa] was significantly higher than the strategy 1strength bond [3.44 MPa]). Predominant failure mode was cement-cohesive-type. Von Mises analysis showed stress concentration at cement near the marginal ridge
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- 2011
35. UNATI/FOSJC/UNESP: promoting the citizenship and the health of the aged citizens
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Dantas, Fernando Henrique [UNESP], Feitosa, Sabrina Alves [UNESP], Massagardi, Tamara Nishijima Pupo [UNESP], Souza, Luciane Navarro de [UNESP], Marques, Juliana Barbosa [UNESP], Rodrigues, José Roberto [UNESP], Molina, Vera Lúcia Ignácio [UNESP], and Universidade Estadual Paulista (Unesp)
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Salud colectiva bucal ,Aging ,Envelhecimento ,Envejecimiento ,Educação em saúde bucal ,Biológicas ,Saúde ,Buccal collective health ,Educación de la salud bucal ,Education in bucal health ,Universidade da terceira idade ,Saúde coletiva bucal ,University of the third age ,Universidad de la tercera edad - Abstract
Made available in DSpace on 2016-08-24T12:43:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2006. Added 1 bitstream(s) on 2016-08-24T13:16:56Z : No. of bitstreams: 1 ISSN1679-4605-2006-03-01-53-69.pdf: 144687 bytes, checksum: 9cc957c1838f0ed719d5a11443e7bc6b (MD5) Objetivou-se avaliar a autopercepção dos idosos pertencentes à UNATI/FOSJC/UNESP quanto as condições da saúde bucal, por meio da entrevista semidiretiva e da aplicação do Índice de Gohai. O resultado obtido mostra uma condição bucal considerada de “regular” para “boa”. Esse resultado deriva da autopercepção que os entrevistados têm da própria boca, gengivas e dentes, e que justificam pelo fato de 59,26% não usarem próteses totais, apenas 20,40% portarem próteses parciais e 55,56% manterem, por seus critérios, boas condições das gengivas. Quando se relaciona a condição bucal à classe social a qual o idoso pertence, reafirma-se que ela é satisfatória, assim como relatam os diferentes estudos revisados. Apenas 5,26% dos pertencentes à classe média se auto-avaliam como “excelente”, enquanto 34,22% dessa classe e 10,53% dos pertencentes à chamada classe trabalhadora se auto-avaliam com “boa” condição bucal. Quanto ao perfil do entrevistado, 16,67% pertencem ao gênero masculino e 83,33% ao feminino e 51,85% são casados. Com relação à UNATI, 40,74% dos idosos a reconhecem como um centro de convivência, como espaço de atualização do conhecimento e rede de auxílio para novas amizades. Concluiu-se que: (1) o conhecimento sobre a autopercepção dos idosos da UNATI se revela pelo Índice de Gohai como “satisfatória”, segundo os critérios subjetivos, e pela ausência de qualquer incômodo nos últimos meses, devido a bons hábitos bucais, higienização e escolha do creme e da escova dental; (2) é necessário o conhecimento dos fatores epidemiológicos, por meio de exames clínicos, para colaborar na compreensão da auto-avaliação e também para identificar qualquer discrepância entre os critérios subjetivos e os técnicos e, assim, facilitar a elaboração de um programa e de ações educativas direcionando ao autodiagnóstico e autocuidado. The objective was to evaluate the self-perception of the elderly pertaining ones tothe UNATI/FOSJC/UNESP regarding buccal health, by means of the half-directiveinterview and of the application of the Index of Gohai. The result is that the oralhealth was considered as between regular and good. This result comes fromthe self-perception that the interviewed ones have of their own mouths, gingivasand teeth and justified by the fact that 59,26% do not to use complete denture, only20.40% to carry partial dentures; 55,56% to keep, at their discretion, goodcondition of gingiva. Regarding to oral health to the social classroom which theelderly belongs, it is reaffirmed that it is satisfactory, as well as tell the differentrevised studies. But 5.26% of the pertaining ones to the middle classes if selfassessmentas being excellent, while 34.22% in these classrooms and 10.53% ofpertaining to the calls the diligent classrooms if auto-assessment as having goodoral health. As of the profile of the interviewed ones, 16.67% are from male genderand 83.33% to the female, and 51.85% are married. With relation to UNATI,40.74% of elder consider it as a aging center, as space of update of theirknowledge and network for new friendships. One concluded that: (1) theknowledge on the self-perception of the aged ones of the UNATI is consideredsatisfactory according to the Index of Gohai, subjective criteria, and for theabsence of any bother in the last months, for the factors as good buccal habits, forthe hygienic cleaning and the choice of the dental cream and the dental brush; (2)the epidemiologistic factors knowledge by means of clinical examinations isnecessary to help understanding of the self-assessment, as well to identify anydiscrepancies between subjective and technician criteria, thus to facilitate theelaboration of a program and educative actions directing to the self-diagnosis andself-care. El objetivo es evaluar la autopercepción de las personas de la tercera edad, pertenecientes a UNATI/FOSJC/UNESP, en relación a las condiciones de la salud bucal, realizado por médio de una entrevista semidirecta y de la aplicación del Índice de Gohai. El resultado obtenido muestra una condición bucal considerada de regular para buena. Ese resultado deriba de la autopercepción que los entrevistados tienen de la propia boca, encias y dientes, y justifican por el hecho de que 59.26% no usaron prótesis total, apenas 20.4% usaron prótesis parcial y 55.56% mantubieron, por sus propios criterios buenas condiciones de las encias. Cuando se relaciona la condición bucal a la clase social a la cual el idoso pertenece, se afirma que ella es satisfactoria, como describen los diferentes estudios analisados. Apenas 5.26% de los pertenecientes a la clase media se autoevaluan como excelentes, en cuanto que 34.22% de esa clase y 10.53% delos pertenecientes a la llamada clase trabajadora se autoevaluan como condición bucal buena. En relación al perfil del entrevistado, 16.67% pertenecen al género masculino y 83.33% al femenino y 51.85% son casados. En relación al UNATI, 40,74% de los de la tercera edad lo reconocen como un centro de convivência, como espacio de actualización del conocimiento y red de auxilio para nuevas amistades. Concluimos que: (1) el conocimiento sobre la autopercepción de los dela tercera edad de la UNATI se rebela por el índice de Gohai como satisfactoria, según los criterios subjetivos, y por la ausencia de cualquier incómodo en los últimos meses, debido a buenos hábitos bucales, higiene y elección de la crema dental y cepillo de dientes; (2) es necesario el conocimiento de los factores epidemiológicos por medio de exames clínicos, para colaborar en la comprensiónde la auto-avaliación y tambien para identificar cualquier conflicto entre los criterios subjetivos y los técnicos y, facilitar la colaboración de un programa y de acciones educativas direccionadas al autodiagnóstico y autocuidado. Universidade Estadual Paulista, Departamento de Odontologia Restauradora, Instituto de Ciência e Tecnologia de São José dos Campos Universidade Estadual Paulista, Departamento de Odontologia Social e Clínica Infantil, Instituto de Ciência e Tecnologia de São José dos Campos
- Published
- 2006
36. Effect of preparation practices and the cowpea cultivar Vigna unguiculata L.Walp on the quality and content of myo-inositol phosphate in akara (fried bean paste)
- Author
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Rogério, Walison Fabio, primary, Greiner, Ralf, additional, Nunes, Itaciara Larroza, additional, Feitosa, Sabrina, additional, Furtunato, Dalva Maria da Nóbrega, additional, and Almeida, Deusdélia Teixeira de, additional
- Published
- 2014
- Full Text
- View/download PDF
37. Qualidade do óleo de palma bruto (Elaeis guineensis): matéria-prima para fritura de acarajés
- Author
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Curvelo, Fabiana Martins, primary, Almeida, Deusdélia Teixeira de, additional, Nunes, Itaciara Larroza, additional, and Feitosa, Sabrina, additional
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- 2011
- Full Text
- View/download PDF
38. Influence of CAD-CAM diamond bur deterioration on surface roughness and maximum failure load of Y-TZP-based restorations.
- Author
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CORAZZA, PEDRO HENRIQUE, DE CASTRO, HUMBERTO LAGO, FEITOSA, SABRINA ALVES, KIMPARA, ESTEVÃO TOMOMITSU, and DELLA BONA, ALVARO
- Subjects
DETERIORATION of materials ,COMPUTER-aided design ,PORCELAIN ,SCANNING electron microscopy ,CAD/CAM systems ,COMPUTER integrated manufacturing systems - Abstract
Purpose: To investigate the influence of CAD-CAM diamond bur deterioration on surface roughness (Ra) and maximum failure load (Lf) of Y-TZP-based ceramic (YZ) substructures (SB) veneered with a feldspathic porcelain. Methods: Two sets of burs (B1 and B2) were used to fabricate 30 YZ SB each in a CAD/CAM system (Cerec InLab). The SB were identified (1-30) according to the milling sequence (MS). SEM images of the burs were recorded before milling, and after milling 15 and 30 SB. The SB Ra was measured. All SB were veneered, cemented onto a fiber reinforced epoxy resin die, and loaded to failure. Specimens from B1 group were cyclic fatigued (106 cycles) before loading to failure. Fractographic analysis was performed. Data were statistically analyzed using Student's t-test, Weibull analysis, Pearson's correlation and ANOVA (α= 0.05). Results: The mean Ra value of B1 specimens was statistically greater than B2. Weibull modulus of B1 and B2 were statistically similar. The correlation between MS and Lf was not statistically significant for the groups. MS and Ra had significant correlation for both groups (B1: r= -0.514, P= 0.015; B2: r= -0.462, P= 0.03). Although the visual aspect (SEM) of the burs was similar after 30 millings, the mean Ra values were significantly different after 27 millings for B1 and 24 millings for B2. [ABSTRACT FROM AUTHOR]
- Published
- 2015
39. Pressable feldspathic inlays in premolars: effect of cementation strategy and mechanical cycling on the adhesive bond between dentin and restoration.
- Author
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Feitosa SA, Corazza PH, Cesar PF, Bottino MA, and Valandro LF
- Subjects
- Acid Etching, Dental methods, Adhesiveness, Bisphenol A-Glycidyl Methacrylate chemistry, Composite Resins chemistry, Computer-Aided Design, Dental Cavity Preparation methods, Elastic Modulus, Finite Element Analysis, Humans, Hydrofluoric Acid chemistry, Materials Testing, Phosphoric Acids chemistry, Polyethylene Glycols chemistry, Polymethacrylic Acids chemistry, Resin Cements chemistry, Silanes chemistry, Stress, Mechanical, Surface Properties, Tensile Strength, Aluminum Silicates chemistry, Bicuspid ultrastructure, Cementation methods, Dental Bonding methods, Dental Porcelain chemistry, Dentin ultrastructure, Inlays, Potassium Compounds chemistry
- Abstract
Purpose: To evaluate the effect of the cementation strategy and mechanical cycling (MC) on the microtensile bond strength (MTBS) of feldspathic inlays cemented to premolars., Materials and Methods: Forty-eight human premolars were prepared and porcelain inlays were produced. Specimens were allocated into 3 groups, based on the cementation strategy: 1) conventional adhesive cementation (RelyX ARC, 3M ESPE): application of etch-and-rinse single bottle adhesive to dentin / ceramic surface treated with hydrofluoric acid (HF) and silane (S) / cementation with resin cement; 2) simplified cementation using a self-adhesive resin cement (RelyX U100, 3M ESPE); 3) modified simplified cementation using a self-adhesive resin cement (RelyX U100, 3M ESPE) with HF+S treatment. Half of the specimens from each group were submitted to MC (2x106 pulses, frequency = 4 Hz, load = 100 N). Each specimen was serially sliced for MTBS and the failures were classified. The stress distribution analysis using FEA was verified., Results: All of the bar-samples from G2 were lost during cutting of the specimens. Mechanical-cycling had no significant effect on bond strength, whereas cementation strategy significant affected MTBS results. The most common type of failure was cohesive of cement. FEA showed that stresses were concentrated mainly at the loading region going up to the root fixation., Conclusion: Porcelain inlays cemented with conventional resin cement or self-adhesive resin cement should be associated with ceramic surface treatment. FEA showed the most critical zone for failure is located in the cement region close to the marginal crest.
- Published
- 2014
- Full Text
- View/download PDF
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