Aretha Heitor Veríssimo - Academia.edu (original) (raw)

Papers by Aretha Heitor Veríssimo

Clinical Oral Investigations, Mar 3, 2022

OBJECTIVE To investigate the incidence and risk factors for non-adaptation of the conventional ma... more OBJECTIVE To investigate the incidence and risk factors for non-adaptation of the conventional mandibular complete denture (CMCD). MATERIALS AND METHODS A total of 108 edentulous patients were rehabilitated with complete dentures (CDs) and followed up at 3- and 6-month intervals. Adaptation was confirmed based on chewing, phonetics, and comfortable swallowing with the CDs. The risk factors among sociodemographic and patient-centered factors were analyzed. Statistical analyses included the chi-square test and then a multivariate analysis. RESULTS After 3 months, 38.0% of patients showed non-adaptation to CMCDs. Non-adaptation was significantly associated with the absence of previous mandibular denture experience (p = 0.042), ulcerations after 15 days of rehabilitation (p < 0.001), and a reduced posterior mandibular ridge (p = 0.035). After 6 months, this incidence decreased to 14.1%. The factors associated with non-adaptation were ulcerative lesions after 15 (p < 0.001) and 30 (p < 0.001) days of the delivery of CDs and the non-regular use of mandibular CDs (p < 0.001). CONCLUSION The incidence of non-adaptation was higher after 3 months, with reduction after 6 months. Sociodemographic variables did not influence the adaptation. After 3 months, the absence of previous experience, traumatic ulcers, and reduced mandibular ridges hindered the adaptation of patients to mandibular CDs. After 6 months, only the occurrence of ulcerative lesions and non-regular wear of dentures were risk factors for non-adaptation. CLINICAL RELEVANCE A considerable number of patients have difficulties in adapting to the mandibular dentures. Identifying the factors of non-adaptation of the dentures will contribute to increasing the predictability of this critical adaptation period.

Journal of Adhesive Dentistry, 2020

PURPOSE To evaluate the effect of surface conditioning methods and aging on the repair bond stren... more PURPOSE To evaluate the effect of surface conditioning methods and aging on the repair bond strength between resin composite and nanoceramic CAD/CAM resin. MATERIALS AND METHODS Twenty-four blocks of nanoceramic CAD/CAM resin (NCR) (Lava Ultimate, 3M Oral Care) (10 x 5 x 2 mm3) and resin composite (Filtek Z350, 3M Oral Care) (RC) were made, embedded in acrylic resin, polished (#600, #800, #1200) and randomly divided into 8 groups (n = 12 each) according to surface conditioning methods (air abrasion with 30-μm CoJet [CJ] or air abrasion with 50-μm Al2O3 [AB]) and aging prior to repair (without aging, 24 h in water at 37°C; with aging 6 months in water at 37°C). The blocks were air abraded (20 s, 2.5 bar, 10 mm) using a standardized device. A layer of adhesive resin (Scotchbond Universal) was applied (20 s) and photopolymerized for 20 s. RC cylinders (Ø = 2 mm; h = 2 mm) were then bonded to the NCR substrates using a Teflon matrix and photopolymerized for 40 s. All specimens were thermocycled (10,000 cycles, 5°C-55°C) and submitted to the shear bond test (50 kgf, 0.5 mm/min) to measure repair strength. Data (MPa) were analyzed using 3-way ANOVA and Tukey's test (α = 0.05). Failure analysis was performed using stereomicroscopy (20X). RESULTS ANOVA revealed a significant effect of only the "material" factor (p = 0.00). The group NCR6mCJ presented bond strengths (29.37 ± 5.41) which were significantly higher than those of the NCR24hCJ (20.88 ± 5.74) and RC groups (p < 0.05). The group RC24hCJ (19.71 ± 4.21) presented the lowest shear bond strength (p < 0.05). Failure analysis revealed predominantly type B mixed failures (adhesive+cohesive in the substrate material) except for the groups NCR24hCJ and NCR6mAB, where mainly type C failure (adhesive+cohesive at the RC) was observed. CONCLUSION Air abrasion with Al2O3 particles or silicatization with CoJet followed by adhesive resin application are effective surface conditioning methods for the repair of nanoceramic CAD/CAM resin with resin composite.

PubMed, May 26, 2023

Purpose: To identify and map the scientific evidence regarding factors associated with the nonada... more Purpose: To identify and map the scientific evidence regarding factors associated with the nonadaptation of completely edentulous patients to mandibular complete dentures. Materials and methods: This scoping review followed the PRISMA-ScR statement for Scoping Reviews and was based on guidelines proposed by Arksey and O'Malley and the Joanna Briggs Institute Manual for Evidence Synthesis. The methodology was registered on the Open Science Framework. An electronic search strategy was conducted in PubMed/MEDLINE, Web of Science, Scopus, Cochrane Library, Virtual Health Library, ClinicalTrials.gov, Google Scholar, and ProQuest databases was conducted. Studies that evaluated factors associated with adaptation to and acceptance of mandibular complete dentures were included, such as sociodemographic, psychologic, patient-related, and denture-related items. Results: The search conducted in March 2022 yielded 9,978 studies. In total, 24 studies were included for data extraction. Sociodemographic factors did not interfere with adaptation to a mandibular complete denture. Psychologic factors and patient-related aspects showed greater association with nonadaptation to mandibular complete dentures than denture-reported factors. Conclusion: Although it is suggestive that psychologic and patient-related factors have higher association with the acceptance of new dentures, data must be interpreted with caution due to the variability of methodologies of the studies included in this review.

Introducao: Novos blocos CAD/CAM de materiais restauradores resinosos, hibridos e cerâmicos tem s... more Introducao: Novos blocos CAD/CAM de materiais restauradores resinosos, hibridos e cerâmicos tem sido desenvolvidos recentemente. Entretanto, a literatura ainda nao tem um protocolo de reparo para esses materiais frente a uma fratura coesiva do material restaurador. Objetivo: Avaliar a influencia do tratamento de superficie (ponta diamantada, jateamento com Al2O3, COJET, e acido hidrofluoridrico) e do envelhecimento in situ na resistencia de uniao ao cisalhamento de blocos CAD/CAM (LU: Lava Ultimate/3M, VE: Vita Enamic/VITA e VS: VITA Suprinity/VITA) a resina composta. Metodologia: 390 blocos (6 x 5 x 2,5mm) foram confeccionados, sendo 130 de cada material restaurador. Foram utilizadas 300 amostras para o teste de resistencia de uniao ao cisalhamento, as outras amostras foram utilizadas para analises extras. Cinquenta amostras de cada material restaurador foram incrustados em proteses totais em uso, e apos periodo de 60 dias (envelhecimento in situ), as 150 amostras envelhecidas e 150 nao envelhecidas foram divididas aleatoriamente (N=30/n=10) de acordo com o tratamento realizado: 1.Ponta diamantada + Single Bond Universal (SUB); 2.Ponta diamantada + silano + adesivo convencional; 3.Acido fluoridrico 10% + silano + adesivo convencional; 4.COJET + silano + adesivo convencional; 5.Jateamento com oxido de aluminio Al2O2 + silano + adesivo convencional. Em seguida, foram construidos cilindros de resina composta Z350 (3M ESPE) (: 2,37mm, altura: 2mm) na superficie dos blocos. Posteriormente, os 300 corpos de prova foram entao submetidos a termociclagem (10.000 ciclos, 50 /550C) e em seguida ao ensaio de cisalhamento (50kgf, 0,5mm/min). Apos fratura, a analise de falha foi realizada em estereomicroscopio (20X). Amostras adicionais confeccionadas de cada material restaurador foram utilizadas para as analises de microdureza Vickers e Rugosidade (n=10) mesmas amostras para os dois testes; analise da viabilidade celular fungica (n=10); analise em microscopia eletronica de varredura (MEV) dos tratamentos superficiais e analise de EDS (n=10) para caracterizacao dos materiais, mesmas amostras para os dois testes. Os dados de resistencia ao cisalhamento (MPa), analise da viabilidade celular (UFC/mL) e microdureza (HV) foram analisados estatisticamente por ANOVA e teste de Tukey (5%). Aos demais testes foram realizadas analises descritivas qualitativas. Resultados: A resistencia de uniao foi afetada pela exposicao ao envelhecimento in situ para os materiais LU e VS (p=0,0001), foi observado no LU maior resistencia de uniao para o grupo Ponta diamantada + Single Bond Universal (SUB) envelhecido (14,67MPa), para o VE o grupo HF envelhecido (17,10MPa) apresentou maior resistencia de uniao, e o VS o grupo HF sem envelhecimento (14,27MPa) apresentou maior resistencia de uniao (p=0,0001). A falha adesiva apresentou maior prevalencia em todos os tipos de bloco CAD/CAM (LU: 78%, VE: 61%, VS: 98%). O Vita Suprinity (734,31HV) exibiu a maior dureza Vikers e o Lava Ultimate (137,34HV) a menor (p=0,0001). A analise de viabilidade celular demonstrou nao haver diferenca entre a adesao fungica nos tres materiais (p=0,9064). Relativa a analise das superficies tratadas (MEV) e rugosidade observou-se que os jateamentos e asperizacao com ponta diamantada apresentaram uma maior alteracao nas superficies de todos os materiais; a analise de EDS demonstrou que os tratamentos de superficie alteram a composicao quimica superficial dos materiais. Conclusao: O envelhecimento in situ altera a resistencia de uniao dos materiais LU e VS. O tratamento de superficie mais eficaz para o LU foi asperizacao com ponta diamantada+SBU, para os VE e VS o condicionamento com HF. O VS apresentou maior dureza Vickers. Os tratamentos de superficie promovem alteracoes superficiais de topografia e rugosidade de todos os materiais testados, as maiores rugosidades por material foram LU: COJET, VE: Al2O3 e VS: Ponta diamantada, lem de alterar a composicao quimica superficial nos materiais.

The International Journal of Prosthodontics

Clinical Oral Investigations, 2022

OBJECTIVE To investigate the incidence and risk factors for non-adaptation of the conventional ma... more OBJECTIVE To investigate the incidence and risk factors for non-adaptation of the conventional mandibular complete denture (CMCD). MATERIALS AND METHODS A total of 108 edentulous patients were rehabilitated with complete dentures (CDs) and followed up at 3- and 6-month intervals. Adaptation was confirmed based on chewing, phonetics, and comfortable swallowing with the CDs. The risk factors among sociodemographic and patient-centered factors were analyzed. Statistical analyses included the chi-square test and then a multivariate analysis. RESULTS After 3 months, 38.0% of patients showed non-adaptation to CMCDs. Non-adaptation was significantly associated with the absence of previous mandibular denture experience (p = 0.042), ulcerations after 15 days of rehabilitation (p < 0.001), and a reduced posterior mandibular ridge (p = 0.035). After 6 months, this incidence decreased to 14.1%. The factors associated with non-adaptation were ulcerative lesions after 15 (p < 0.001) and 30 (p < 0.001) days of the delivery of CDs and the non-regular use of mandibular CDs (p < 0.001). CONCLUSION The incidence of non-adaptation was higher after 3 months, with reduction after 6 months. Sociodemographic variables did not influence the adaptation. After 3 months, the absence of previous experience, traumatic ulcers, and reduced mandibular ridges hindered the adaptation of patients to mandibular CDs. After 6 months, only the occurrence of ulcerative lesions and non-regular wear of dentures were risk factors for non-adaptation. CLINICAL RELEVANCE A considerable number of patients have difficulties in adapting to the mandibular dentures. Identifying the factors of non-adaptation of the dentures will contribute to increasing the predictability of this critical adaptation period.

The journal of adhesive dentistry, 2020

PURPOSE To evaluate the effect of surface conditioning methods and aging on the repair bond stren... more PURPOSE To evaluate the effect of surface conditioning methods and aging on the repair bond strength between resin composite and nanoceramic CAD/CAM resin. MATERIALS AND METHODS Twenty-four blocks of nanoceramic CAD/CAM resin (NCR) (Lava Ultimate, 3M Oral Care) (10 x 5 x 2 mm3) and resin composite (Filtek Z350, 3M Oral Care) (RC) were made, embedded in acrylic resin, polished (#600, #800, #1200) and randomly divided into 8 groups (n = 12 each) according to surface conditioning methods (air abrasion with 30-μm CoJet [CJ] or air abrasion with 50-μm Al2O3 [AB]) and aging prior to repair (without aging, 24 h in water at 37°C; with aging 6 months in water at 37°C). The blocks were air abraded (20 s, 2.5 bar, 10 mm) using a standardized device. A layer of adhesive resin (Scotchbond Universal) was applied (20 s) and photopolymerized for 20 s. RC cylinders (Ø = 2 mm; h = 2 mm) were then bonded to the NCR substrates using a Teflon matrix and photopolymerized for 40 s. All specimens were ther...

The Journal of Prosthetic Dentistry, 2021

STATEMENT OF PROBLEM Which surface treatment provides the optimal bond strength (BS) for the repa... more STATEMENT OF PROBLEM Which surface treatment provides the optimal bond strength (BS) for the repair of resin nanoceramics (RNCs) and polymer-infiltrated ceramics (PICs) is unclear. PURPOSE The purpose of this systematic review and meta-analysis of in vitro studies was to determine the best surface treatment protocols for the repair of PICs and RNCs. MATERIAL AND METHODS The PubMed, Scopus, and Web of Science electronic databases were searched to select in vitro studies in English up to March 2020. Studies with fewer than 5 specimens, those that did not evaluate the BS of PICs or RNCs, and those with aging for fewer than 30 days and 5000 cycles were excluded. Data sets were extracted, and the mean differences were analyzed by using a systematic review software program. RESULTS Among 284 potentially eligible studies, 21 were selected for full-text analysis, and 9 were included in the systematic review, of which 6 were used in the meta-analysis. The meta-analyses were performed for each treatment surface versus their respective control group and their combinations according to material: RNCs and PICs. For RNCs, airborne-particle abrasion with aluminum oxide (Al2O3) treatment was statistically higher than tribochemical silica airborne-particle abrasion (CoJet) (P=.02, I2=90%) and that in the hydrofluoric acid (HF) (P<.001, I2=0%) groups and was statistically similar to diamond rotary instrument grinding (P=.40, I2=54%). For PICs, the treatment with hydrofluoric acid (HF) was statistically significantly higher than with CoJet (P=.03, I2=62%) and airborne-particle abrasion with Al2O3 (P<.001, I2=98%). CONCLUSIONS The best surface treatment protocol for repair varied according to the restorative material. HF followed by silanization is suggested for PICs, and airborne-particle abrasion with Al2O3 or preparation with a diamond rotary instrument for RNCs.

Archives of Health Investigation, 2018

O objetivo desse estudo foi avaliar a influencia de diferentes monomeros funcionais fosfatados em... more O objetivo desse estudo foi avaliar a influencia de diferentes monomeros funcionais fosfatados em primers e sistemas de cimentacao na resistencia de uniao da zirconia a dentina. Cento e oitenta coroas de dentes bovinos tiveram a dentina da face vestibular exposta apos o desgaste com lixas (#200,400,600) em politriz. 180 cilindros (O: 3.4mm; altura: 4 mm) de zirconia (Vita In-Ceram 2000) sinterizada foram divididos em 18 grupos (n=10) de acordo com fatores: “Sistema de Cimentacao” (Panavia F –PAN; RelyX Ultimate – ULT, Multilink N - MULT) e “envelhecimento” (armazenamento 37°C/24h – C (controle), 30 dias - D ou 6 meses- M; e 5.000, 10.000 ou 20.000 mil ciclos de termociclagem - TC, 5/55°C, 30s). Apos a cimentacao e envelhecimento dos especimes, foi realizado o ensaio de cisalhamento (v=1 mm/min), grau de conversao (GC) e analise de falhas. Foi feito teste de Kruskall –Wallis, seguido do teste de Dunn (α=5%). Os cimentos Multilink N (8,00)A e RelyX Ultimate (5,30)AB foram semelhantes ...

Archives of Health Investigation, 2018

O objetivo desta revisao sistematica foi avaliar na literatura qual o melhor protocolo de reparo ... more O objetivo desta revisao sistematica foi avaliar na literatura qual o melhor protocolo de reparo de resinas nanocerâmicas e materiais hibridos em CAD/CAM, na resistencia de uniao desses materiais (em estudos in vitro). Este estudo seguiu o PRISMA. Para a busca eletronica, as bases de dados utilizadas foram PubMed, Scopus e Web of Science, incluindo artigos ate marco de 2018, em ingles. Assim, 52 artigos foram selecionados para leitura de titulos e resumos, dos quais 15 para leitura completa. Aplicando-se os criterios de elegibilidade, 6 artigos foram incluidos nesta revisao o risco de vies foi realizado, mas nenhum estudo excluido. Os maiores valores de resistencia de uniao para a cerâmica infiltrada por polimero (Vita Enamic- Vita Zahanfarbrik) foi o condicionamento com acido fluoridrico (60s) seguido pela aplicacao do silano. Para as resinas nanocerâmicas (Lava ultimate-3M ESPE e Cerasmart-GC) o Jateamento com oxido de aluminio ou sistema Cojet, como tambem a asperizacao com ponta...

Archives of Health Investigation, 2018

O objetivo deste relato de caso foi avaliar o desempenho clinico de lentes de contato em zirconia... more O objetivo deste relato de caso foi avaliar o desempenho clinico de lentes de contato em zirconia ultra-translucida cimentadas adesivamente ao esmalte. Paciente do genero feminino, A.T.T.S., 27 anos, procurou atendimento odontologico da Universidade Federal do Rio Grande do Norte (Natal, RN) queixando-se do tamanho e cor dos dentes. Foi realizado o planejamento digital do sorriso e observou-se a necessidade de melhora na forma, contorno e tamanho dos elementos 13 ao 23. Apos enceramento de diagnostico e mock-up (Systemp/Ivoclar Vivadent), os preparos minimamente invasivos em esmalte foram realizados e em seguida moldados com silicone de adicao (Express XT/ 3M ESPE). As lentes de contato foram confeccionadas em zirconia monolitica ultra-translucida (Prettau Anterior, Zirkonzahn). Para a cimentacao, condicionou-se o substrato com acido fosforico a 35% (Ultra-Etch/ Ultradent - 20 segundos) nas superficies internas das cerâmicas, jateamento (CoJet, 3M ESPE) por 20 segundos e aplicacao d...

Research, Society and Development, 2020

This present study describes an impression technique to rehabilitate patients with flabby ridge i... more This present study describes an impression technique to rehabilitate patients with flabby ridge in pre-maxilla through complete dentures. The proposed technique consists on the association of nondisplacive impression of the flabby area in the primary and functional impression. Therefore, a primary impression was performed with irreversible hydrocolloid with a dual impression. The impression material was removed at the region corresponding to the flabby area, characterizing a window, where a re-impression was conducted with the same material in a more fluid consistency. The functional impression was executed with a custom tray with perforations at the flabby area fabricated over a primary anatomic cast previously relieved. As a result, an anatomic impression with reduced compression over the flabby ridge was obtained. Moreover, an accentuated decrease of the mucosa compression was obtained through the material overflow from the custom tray perforations at the functional impression. A...

Clinical Oral Investigations, Mar 3, 2022

OBJECTIVE To investigate the incidence and risk factors for non-adaptation of the conventional ma... more OBJECTIVE To investigate the incidence and risk factors for non-adaptation of the conventional mandibular complete denture (CMCD). MATERIALS AND METHODS A total of 108 edentulous patients were rehabilitated with complete dentures (CDs) and followed up at 3- and 6-month intervals. Adaptation was confirmed based on chewing, phonetics, and comfortable swallowing with the CDs. The risk factors among sociodemographic and patient-centered factors were analyzed. Statistical analyses included the chi-square test and then a multivariate analysis. RESULTS After 3 months, 38.0% of patients showed non-adaptation to CMCDs. Non-adaptation was significantly associated with the absence of previous mandibular denture experience (p = 0.042), ulcerations after 15 days of rehabilitation (p < 0.001), and a reduced posterior mandibular ridge (p = 0.035). After 6 months, this incidence decreased to 14.1%. The factors associated with non-adaptation were ulcerative lesions after 15 (p < 0.001) and 30 (p < 0.001) days of the delivery of CDs and the non-regular use of mandibular CDs (p < 0.001). CONCLUSION The incidence of non-adaptation was higher after 3 months, with reduction after 6 months. Sociodemographic variables did not influence the adaptation. After 3 months, the absence of previous experience, traumatic ulcers, and reduced mandibular ridges hindered the adaptation of patients to mandibular CDs. After 6 months, only the occurrence of ulcerative lesions and non-regular wear of dentures were risk factors for non-adaptation. CLINICAL RELEVANCE A considerable number of patients have difficulties in adapting to the mandibular dentures. Identifying the factors of non-adaptation of the dentures will contribute to increasing the predictability of this critical adaptation period.

Journal of Adhesive Dentistry, 2020

PURPOSE To evaluate the effect of surface conditioning methods and aging on the repair bond stren... more PURPOSE To evaluate the effect of surface conditioning methods and aging on the repair bond strength between resin composite and nanoceramic CAD/CAM resin. MATERIALS AND METHODS Twenty-four blocks of nanoceramic CAD/CAM resin (NCR) (Lava Ultimate, 3M Oral Care) (10 x 5 x 2 mm3) and resin composite (Filtek Z350, 3M Oral Care) (RC) were made, embedded in acrylic resin, polished (#600, #800, #1200) and randomly divided into 8 groups (n = 12 each) according to surface conditioning methods (air abrasion with 30-μm CoJet [CJ] or air abrasion with 50-μm Al2O3 [AB]) and aging prior to repair (without aging, 24 h in water at 37°C; with aging 6 months in water at 37°C). The blocks were air abraded (20 s, 2.5 bar, 10 mm) using a standardized device. A layer of adhesive resin (Scotchbond Universal) was applied (20 s) and photopolymerized for 20 s. RC cylinders (Ø = 2 mm; h = 2 mm) were then bonded to the NCR substrates using a Teflon matrix and photopolymerized for 40 s. All specimens were thermocycled (10,000 cycles, 5°C-55°C) and submitted to the shear bond test (50 kgf, 0.5 mm/min) to measure repair strength. Data (MPa) were analyzed using 3-way ANOVA and Tukey's test (α = 0.05). Failure analysis was performed using stereomicroscopy (20X). RESULTS ANOVA revealed a significant effect of only the "material" factor (p = 0.00). The group NCR6mCJ presented bond strengths (29.37 ± 5.41) which were significantly higher than those of the NCR24hCJ (20.88 ± 5.74) and RC groups (p < 0.05). The group RC24hCJ (19.71 ± 4.21) presented the lowest shear bond strength (p < 0.05). Failure analysis revealed predominantly type B mixed failures (adhesive+cohesive in the substrate material) except for the groups NCR24hCJ and NCR6mAB, where mainly type C failure (adhesive+cohesive at the RC) was observed. CONCLUSION Air abrasion with Al2O3 particles or silicatization with CoJet followed by adhesive resin application are effective surface conditioning methods for the repair of nanoceramic CAD/CAM resin with resin composite.

PubMed, May 26, 2023

Purpose: To identify and map the scientific evidence regarding factors associated with the nonada... more Purpose: To identify and map the scientific evidence regarding factors associated with the nonadaptation of completely edentulous patients to mandibular complete dentures. Materials and methods: This scoping review followed the PRISMA-ScR statement for Scoping Reviews and was based on guidelines proposed by Arksey and O'Malley and the Joanna Briggs Institute Manual for Evidence Synthesis. The methodology was registered on the Open Science Framework. An electronic search strategy was conducted in PubMed/MEDLINE, Web of Science, Scopus, Cochrane Library, Virtual Health Library, ClinicalTrials.gov, Google Scholar, and ProQuest databases was conducted. Studies that evaluated factors associated with adaptation to and acceptance of mandibular complete dentures were included, such as sociodemographic, psychologic, patient-related, and denture-related items. Results: The search conducted in March 2022 yielded 9,978 studies. In total, 24 studies were included for data extraction. Sociodemographic factors did not interfere with adaptation to a mandibular complete denture. Psychologic factors and patient-related aspects showed greater association with nonadaptation to mandibular complete dentures than denture-reported factors. Conclusion: Although it is suggestive that psychologic and patient-related factors have higher association with the acceptance of new dentures, data must be interpreted with caution due to the variability of methodologies of the studies included in this review.

Introducao: Novos blocos CAD/CAM de materiais restauradores resinosos, hibridos e cerâmicos tem s... more Introducao: Novos blocos CAD/CAM de materiais restauradores resinosos, hibridos e cerâmicos tem sido desenvolvidos recentemente. Entretanto, a literatura ainda nao tem um protocolo de reparo para esses materiais frente a uma fratura coesiva do material restaurador. Objetivo: Avaliar a influencia do tratamento de superficie (ponta diamantada, jateamento com Al2O3, COJET, e acido hidrofluoridrico) e do envelhecimento in situ na resistencia de uniao ao cisalhamento de blocos CAD/CAM (LU: Lava Ultimate/3M, VE: Vita Enamic/VITA e VS: VITA Suprinity/VITA) a resina composta. Metodologia: 390 blocos (6 x 5 x 2,5mm) foram confeccionados, sendo 130 de cada material restaurador. Foram utilizadas 300 amostras para o teste de resistencia de uniao ao cisalhamento, as outras amostras foram utilizadas para analises extras. Cinquenta amostras de cada material restaurador foram incrustados em proteses totais em uso, e apos periodo de 60 dias (envelhecimento in situ), as 150 amostras envelhecidas e 150 nao envelhecidas foram divididas aleatoriamente (N=30/n=10) de acordo com o tratamento realizado: 1.Ponta diamantada + Single Bond Universal (SUB); 2.Ponta diamantada + silano + adesivo convencional; 3.Acido fluoridrico 10% + silano + adesivo convencional; 4.COJET + silano + adesivo convencional; 5.Jateamento com oxido de aluminio Al2O2 + silano + adesivo convencional. Em seguida, foram construidos cilindros de resina composta Z350 (3M ESPE) (: 2,37mm, altura: 2mm) na superficie dos blocos. Posteriormente, os 300 corpos de prova foram entao submetidos a termociclagem (10.000 ciclos, 50 /550C) e em seguida ao ensaio de cisalhamento (50kgf, 0,5mm/min). Apos fratura, a analise de falha foi realizada em estereomicroscopio (20X). Amostras adicionais confeccionadas de cada material restaurador foram utilizadas para as analises de microdureza Vickers e Rugosidade (n=10) mesmas amostras para os dois testes; analise da viabilidade celular fungica (n=10); analise em microscopia eletronica de varredura (MEV) dos tratamentos superficiais e analise de EDS (n=10) para caracterizacao dos materiais, mesmas amostras para os dois testes. Os dados de resistencia ao cisalhamento (MPa), analise da viabilidade celular (UFC/mL) e microdureza (HV) foram analisados estatisticamente por ANOVA e teste de Tukey (5%). Aos demais testes foram realizadas analises descritivas qualitativas. Resultados: A resistencia de uniao foi afetada pela exposicao ao envelhecimento in situ para os materiais LU e VS (p=0,0001), foi observado no LU maior resistencia de uniao para o grupo Ponta diamantada + Single Bond Universal (SUB) envelhecido (14,67MPa), para o VE o grupo HF envelhecido (17,10MPa) apresentou maior resistencia de uniao, e o VS o grupo HF sem envelhecimento (14,27MPa) apresentou maior resistencia de uniao (p=0,0001). A falha adesiva apresentou maior prevalencia em todos os tipos de bloco CAD/CAM (LU: 78%, VE: 61%, VS: 98%). O Vita Suprinity (734,31HV) exibiu a maior dureza Vikers e o Lava Ultimate (137,34HV) a menor (p=0,0001). A analise de viabilidade celular demonstrou nao haver diferenca entre a adesao fungica nos tres materiais (p=0,9064). Relativa a analise das superficies tratadas (MEV) e rugosidade observou-se que os jateamentos e asperizacao com ponta diamantada apresentaram uma maior alteracao nas superficies de todos os materiais; a analise de EDS demonstrou que os tratamentos de superficie alteram a composicao quimica superficial dos materiais. Conclusao: O envelhecimento in situ altera a resistencia de uniao dos materiais LU e VS. O tratamento de superficie mais eficaz para o LU foi asperizacao com ponta diamantada+SBU, para os VE e VS o condicionamento com HF. O VS apresentou maior dureza Vickers. Os tratamentos de superficie promovem alteracoes superficiais de topografia e rugosidade de todos os materiais testados, as maiores rugosidades por material foram LU: COJET, VE: Al2O3 e VS: Ponta diamantada, lem de alterar a composicao quimica superficial nos materiais.

The International Journal of Prosthodontics

Clinical Oral Investigations, 2022

OBJECTIVE To investigate the incidence and risk factors for non-adaptation of the conventional ma... more OBJECTIVE To investigate the incidence and risk factors for non-adaptation of the conventional mandibular complete denture (CMCD). MATERIALS AND METHODS A total of 108 edentulous patients were rehabilitated with complete dentures (CDs) and followed up at 3- and 6-month intervals. Adaptation was confirmed based on chewing, phonetics, and comfortable swallowing with the CDs. The risk factors among sociodemographic and patient-centered factors were analyzed. Statistical analyses included the chi-square test and then a multivariate analysis. RESULTS After 3 months, 38.0% of patients showed non-adaptation to CMCDs. Non-adaptation was significantly associated with the absence of previous mandibular denture experience (p = 0.042), ulcerations after 15 days of rehabilitation (p < 0.001), and a reduced posterior mandibular ridge (p = 0.035). After 6 months, this incidence decreased to 14.1%. The factors associated with non-adaptation were ulcerative lesions after 15 (p < 0.001) and 30 (p < 0.001) days of the delivery of CDs and the non-regular use of mandibular CDs (p < 0.001). CONCLUSION The incidence of non-adaptation was higher after 3 months, with reduction after 6 months. Sociodemographic variables did not influence the adaptation. After 3 months, the absence of previous experience, traumatic ulcers, and reduced mandibular ridges hindered the adaptation of patients to mandibular CDs. After 6 months, only the occurrence of ulcerative lesions and non-regular wear of dentures were risk factors for non-adaptation. CLINICAL RELEVANCE A considerable number of patients have difficulties in adapting to the mandibular dentures. Identifying the factors of non-adaptation of the dentures will contribute to increasing the predictability of this critical adaptation period.

The journal of adhesive dentistry, 2020

PURPOSE To evaluate the effect of surface conditioning methods and aging on the repair bond stren... more PURPOSE To evaluate the effect of surface conditioning methods and aging on the repair bond strength between resin composite and nanoceramic CAD/CAM resin. MATERIALS AND METHODS Twenty-four blocks of nanoceramic CAD/CAM resin (NCR) (Lava Ultimate, 3M Oral Care) (10 x 5 x 2 mm3) and resin composite (Filtek Z350, 3M Oral Care) (RC) were made, embedded in acrylic resin, polished (#600, #800, #1200) and randomly divided into 8 groups (n = 12 each) according to surface conditioning methods (air abrasion with 30-μm CoJet [CJ] or air abrasion with 50-μm Al2O3 [AB]) and aging prior to repair (without aging, 24 h in water at 37°C; with aging 6 months in water at 37°C). The blocks were air abraded (20 s, 2.5 bar, 10 mm) using a standardized device. A layer of adhesive resin (Scotchbond Universal) was applied (20 s) and photopolymerized for 20 s. RC cylinders (Ø = 2 mm; h = 2 mm) were then bonded to the NCR substrates using a Teflon matrix and photopolymerized for 40 s. All specimens were ther...

The Journal of Prosthetic Dentistry, 2021

STATEMENT OF PROBLEM Which surface treatment provides the optimal bond strength (BS) for the repa... more STATEMENT OF PROBLEM Which surface treatment provides the optimal bond strength (BS) for the repair of resin nanoceramics (RNCs) and polymer-infiltrated ceramics (PICs) is unclear. PURPOSE The purpose of this systematic review and meta-analysis of in vitro studies was to determine the best surface treatment protocols for the repair of PICs and RNCs. MATERIAL AND METHODS The PubMed, Scopus, and Web of Science electronic databases were searched to select in vitro studies in English up to March 2020. Studies with fewer than 5 specimens, those that did not evaluate the BS of PICs or RNCs, and those with aging for fewer than 30 days and 5000 cycles were excluded. Data sets were extracted, and the mean differences were analyzed by using a systematic review software program. RESULTS Among 284 potentially eligible studies, 21 were selected for full-text analysis, and 9 were included in the systematic review, of which 6 were used in the meta-analysis. The meta-analyses were performed for each treatment surface versus their respective control group and their combinations according to material: RNCs and PICs. For RNCs, airborne-particle abrasion with aluminum oxide (Al2O3) treatment was statistically higher than tribochemical silica airborne-particle abrasion (CoJet) (P=.02, I2=90%) and that in the hydrofluoric acid (HF) (P<.001, I2=0%) groups and was statistically similar to diamond rotary instrument grinding (P=.40, I2=54%). For PICs, the treatment with hydrofluoric acid (HF) was statistically significantly higher than with CoJet (P=.03, I2=62%) and airborne-particle abrasion with Al2O3 (P<.001, I2=98%). CONCLUSIONS The best surface treatment protocol for repair varied according to the restorative material. HF followed by silanization is suggested for PICs, and airborne-particle abrasion with Al2O3 or preparation with a diamond rotary instrument for RNCs.

Archives of Health Investigation, 2018

O objetivo desse estudo foi avaliar a influencia de diferentes monomeros funcionais fosfatados em... more O objetivo desse estudo foi avaliar a influencia de diferentes monomeros funcionais fosfatados em primers e sistemas de cimentacao na resistencia de uniao da zirconia a dentina. Cento e oitenta coroas de dentes bovinos tiveram a dentina da face vestibular exposta apos o desgaste com lixas (#200,400,600) em politriz. 180 cilindros (O: 3.4mm; altura: 4 mm) de zirconia (Vita In-Ceram 2000) sinterizada foram divididos em 18 grupos (n=10) de acordo com fatores: “Sistema de Cimentacao” (Panavia F –PAN; RelyX Ultimate – ULT, Multilink N - MULT) e “envelhecimento” (armazenamento 37°C/24h – C (controle), 30 dias - D ou 6 meses- M; e 5.000, 10.000 ou 20.000 mil ciclos de termociclagem - TC, 5/55°C, 30s). Apos a cimentacao e envelhecimento dos especimes, foi realizado o ensaio de cisalhamento (v=1 mm/min), grau de conversao (GC) e analise de falhas. Foi feito teste de Kruskall –Wallis, seguido do teste de Dunn (α=5%). Os cimentos Multilink N (8,00)A e RelyX Ultimate (5,30)AB foram semelhantes ...

Archives of Health Investigation, 2018

O objetivo desta revisao sistematica foi avaliar na literatura qual o melhor protocolo de reparo ... more O objetivo desta revisao sistematica foi avaliar na literatura qual o melhor protocolo de reparo de resinas nanocerâmicas e materiais hibridos em CAD/CAM, na resistencia de uniao desses materiais (em estudos in vitro). Este estudo seguiu o PRISMA. Para a busca eletronica, as bases de dados utilizadas foram PubMed, Scopus e Web of Science, incluindo artigos ate marco de 2018, em ingles. Assim, 52 artigos foram selecionados para leitura de titulos e resumos, dos quais 15 para leitura completa. Aplicando-se os criterios de elegibilidade, 6 artigos foram incluidos nesta revisao o risco de vies foi realizado, mas nenhum estudo excluido. Os maiores valores de resistencia de uniao para a cerâmica infiltrada por polimero (Vita Enamic- Vita Zahanfarbrik) foi o condicionamento com acido fluoridrico (60s) seguido pela aplicacao do silano. Para as resinas nanocerâmicas (Lava ultimate-3M ESPE e Cerasmart-GC) o Jateamento com oxido de aluminio ou sistema Cojet, como tambem a asperizacao com ponta...

Archives of Health Investigation, 2018

O objetivo deste relato de caso foi avaliar o desempenho clinico de lentes de contato em zirconia... more O objetivo deste relato de caso foi avaliar o desempenho clinico de lentes de contato em zirconia ultra-translucida cimentadas adesivamente ao esmalte. Paciente do genero feminino, A.T.T.S., 27 anos, procurou atendimento odontologico da Universidade Federal do Rio Grande do Norte (Natal, RN) queixando-se do tamanho e cor dos dentes. Foi realizado o planejamento digital do sorriso e observou-se a necessidade de melhora na forma, contorno e tamanho dos elementos 13 ao 23. Apos enceramento de diagnostico e mock-up (Systemp/Ivoclar Vivadent), os preparos minimamente invasivos em esmalte foram realizados e em seguida moldados com silicone de adicao (Express XT/ 3M ESPE). As lentes de contato foram confeccionadas em zirconia monolitica ultra-translucida (Prettau Anterior, Zirkonzahn). Para a cimentacao, condicionou-se o substrato com acido fosforico a 35% (Ultra-Etch/ Ultradent - 20 segundos) nas superficies internas das cerâmicas, jateamento (CoJet, 3M ESPE) por 20 segundos e aplicacao d...

Research, Society and Development, 2020

This present study describes an impression technique to rehabilitate patients with flabby ridge i... more This present study describes an impression technique to rehabilitate patients with flabby ridge in pre-maxilla through complete dentures. The proposed technique consists on the association of nondisplacive impression of the flabby area in the primary and functional impression. Therefore, a primary impression was performed with irreversible hydrocolloid with a dual impression. The impression material was removed at the region corresponding to the flabby area, characterizing a window, where a re-impression was conducted with the same material in a more fluid consistency. The functional impression was executed with a custom tray with perforations at the flabby area fabricated over a primary anatomic cast previously relieved. As a result, an anatomic impression with reduced compression over the flabby ridge was obtained. Moreover, an accentuated decrease of the mucosa compression was obtained through the material overflow from the custom tray perforations at the functional impression. A...