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Malaquias P, Gutierrez MF, Hass V, Stanislawczuk R, Bandeca MC, Arrais C, Farago PV, Reis A, Loguercio AD. Two-year Effects of Chlorhexidine-containing Adhesives on the In Vitro Durability of Resin-dentin Interfaces and Modeling of Drug Release. Oper Dent 2018; 43:201-212. [PMID: 29504885 DOI: 10.2341/16-333-l] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVES To evaluate the effects of addition of diacetate chlorhexidine (CHX) at different concentrations into two etch-and-rinse adhesive systems on CHX release, as well as the immediate (IM) and two-year (2-Y) resin-dentin microtensile bond strength (μTBS) and nanoleakage (NL). METHODS CHX was added to XP Bond (XP) and Ambar (AM) at concentrations of 0.0 wt% (control); 0.01 wt%; 0.05 wt%; and 0.1 to 0.2 wt%. To assess the cumulative CHX release, adhesive disks were made in a metallic matrix and after light-curing were stored in water. Ultraviolet spectrophotometric measurements of the storage solution were performed to examine the release kinetics of CHX. For μTBS and NL, the occlusal enamel of molars was removed and the adhesives were applied to the dentin surface after acid etching. After composite resin build-up, specimens were sectioned to obtain μTBS sticks. The specimens were subjected to μTBS and NL at IM and after 2-Y. In addition, specimens underwent examination for CHX using micro-Raman spectroscopy. All data were submitted to statistical analysis (α=0.05). RESULTS With regard to CHX release, AM showed a slower and gradual release of CHX while XP released CHX more quickly ( p<0.05), and CHX was still present in the hybrid layers after 2-Y. Both adhesives showed CHX release at 2-Y water storage. Both CHX-containing adhesives showed higher μTBS values than did the control group ( p<0.05).
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Coppla FM, Rezende M, de Paula E, Farago PV, Loguercio AD, Kossatz S, Reis A. Combination of Acetaminophen/Codeine Analgesics Does Not Avoid Bleaching-Induced Tooth Sensitivity: A Randomized, Triple-Blind Two-Center Clinical Trial. Oper Dent 2018; 43:E53-E63. [PMID: 29504880 DOI: 10.2341/17-092-c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Bleaching-induced tooth sensitivity (TS) is highly prevalent. OBJECTIVE This study aimed to determine if the combination of opioids and nonopioids analgesics (Tylex) may provide a better analgesic effect. METHOD A triple-blind, parallel, randomized two-center clinical trial was conducted with 105 healthy patients who received either a placebo or a combination of acetaminophen/codeine. The first dose of Tylex 30 mg (acetaminophen 500 mg/codeine 30 mg) or placebo was administered one hour before the in-office bleaching (35% hydrogen peroxide), and extra doses were administered every six hours for 48 hours. The TS was recorded using a visual analog scale of 0 to 10 and a numeric rating scale of 0 to 4 in different periods: during bleaching, one hour up to 24 hours, and 24 hours up to 48 hours postbleaching. The color was measured before and one month after dental bleaching with a visual shade guide (Vita Classical), Vita Bleachedguide 3D-MASTER, and the spectrophotometer Vita Easyshade. The absolute risk of TS was evaluated using the Fisher exact test. Data of TS intensity with numeric rating scale of the two groups were compared with the Mann-Whitney U-test and the Friedman test, while data from the visual analog scale were evaluated by two-way repeated measures analysis of variance and the Tukey test for pairwise comparison. The color changes between groups were compared using the Student t-test (α=0.05). RESULTS No significant differences between the groups were observed in the risk and intensity of TS. The overall absolute risk of TS was approximately 96%. No significant differences between groups were observed in terms of color change ( p>0.05) for any scale. CONCLUSION The use of an acetaminophen/codeine combination prior to in-office bleaching does not reduce the risk and intensity of bleaching-induced TS.
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Antoniadis S, Häberle L, Rübner M, Büchner K, Blum S, Ekici A, Hartmann A, Hein A, Reis A, Beckmann MW, Renner SP, Fasching PA, Burghaus S. Genetic risk factors for endometriosis, endometrial and ovarian cancer in a German Case-Control Study. Geburtshilfe Frauenheilkd 2018. [DOI: 10.1055/s-0038-1670971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Cordeiro D, Toda C, Hanan S, Arnhold LP, Reis A, Loguercio AD, Bandeira MCL. Clinical Evaluation of Different Delivery Methods of At-Home Bleaching Gels Composed of 10% Hydrogen Peroxide. Oper Dent 2018; 44:13-23. [PMID: 30142037 DOI: 10.2341/17-174-c] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVES: This study aimed to compare the tooth sensitivity, gingival irritation, and bleaching efficacy of at-home whitening performed with 10% hydrogen peroxide (HP) using a conventional tray-delivered system or two different bleaching systems (strips or prefilled disposable trays). METHODS AND MATERIALS: Sixty patients, with maxillary incisors darker than A2 were selected for this single-blind, parallel randomized clinical trial. Teeth were bleached during 14 days with a 30-minute gel contact with teeth per day. The 10% HP was delivered in a bleaching tray (White Class, FGM) in strips (White Strips, Oral-B) or prefilled disposable trays (Opalescence Go, Ultradent). The color changes were evaluated by subjective (Vita Classical and Vita Bleachedguide) and objective (Easyshade Spectrophotometer) methods at baseline and 30 days after the second bleaching session. Tooth sensitivity was recorded during 14 days with a five-point numeric rating scale (NRS) and 0-10 visual analog scale (VAS). The risk of gingival irritation was also recorded during 14 days on a dichotomous scale. All data were submitted to appropriate statistical analysis (α=0.05). RESULTS: No significant difference was observed in the risks of tooth sensitivity among groups ( p>0.09). However, the conventional bleaching tray produced a higher intensity of tooth sensitivity when compared with the strips and prefilled disposable tray systems ( p<0.04). Regarding gingival irritation, the prefilled disposable tray system showed a lower risk of gingival irritation when compared with the conventional bleaching tray ( p=0.003). Significant whitening was observed in all groups after 30 days of clinical evaluation with no significant difference between them ( p>0.06). CONCLUSIONS: All 10% HP bleaching systems showed similar whitening after a 14-day use. However, the strips and prefilled disposable trays produced lower intensity of tooth sensitivity than the conventional bleaching tray system. The prefilled disposable tray produced lower risk of gingival irritation when compared to the conventional bleaching tray.
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Ferreira A, Marques P, Ribeiro B, Assemany P, de Mendonça HV, Barata A, Oliveira AC, Reis A, Pinheiro HM, Gouveia L. Combining biotechnology with circular bioeconomy: From poultry, swine, cattle, brewery, dairy and urban wastewaters to biohydrogen. ENVIRONMENTAL RESEARCH 2018; 164:32-38. [PMID: 29475106 DOI: 10.1016/j.envres.2018.02.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 02/06/2018] [Accepted: 02/07/2018] [Indexed: 06/08/2023]
Abstract
The ability of microalgae to grow in nutrient-rich environments and to accumulate nutrients from wastewaters (WW) makes them attractive for the sustainable and low-cost treatment of WW. The valuable biomass produced can be further used for the generation of bioenergy, animal feed, fertilizers, and biopolymers, among others. In this study, Scenedesmus obliquus was able to remove nutrients from different wastewaters (poultry, swine and cattle breeding, brewery and dairy industries, and urban) with removal ranges of 95-100% for nitrogen, 63-99% for phosphorus and 48-70% for chemical oxygen demand. The biomass productivity using wastewaters was higher (except for poultry) than in synthetic medium (Bristol), the highest value being obtained in brewery wastewater (1025 mg/(L.day) of freeze-dried biomass). The produced biomass contained 31-53% of proteins, 12-36% of sugars and 8-23% of lipids, regardless of the type of wastewater. The potential of the produced Scenedesmus obliquus biomass for the generation of BioH2 through batch dark fermentation processes with Enterobacter aerogenes was evaluated. The obtained yields ranged, in mL H2/g Volatile Solids (VS), from 50.1 for biomass from anaerobically digested cattle WW to 390 for swine WW, whereas the yield with biomass cultivated in Bristol medium was 57.6 mL H2/gVS.
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Gonçalves A, Costa H, Fonseca M, Boiteux L, Lopes C, Reis A. Variability and geographical distribution ofFusarium oxysporumf. sp.lycopersiciphysiological races and field performance of resistant sources in Brazil. ACTA ACUST UNITED AC 2018. [DOI: 10.17660/actahortic.2018.1207.5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Gomes A, Cruz C, Rocha J, Ricardo M, Vicente M, Melo A, Santos M, Carvalho L, Gonçalves F, Reis A. Pulmonary hypertension: Real-world data from a Portuguese expert referral centre. Pulmonology 2018; 24:231-240. [DOI: 10.1016/j.pulmoe.2018.02.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 01/24/2018] [Accepted: 02/04/2018] [Indexed: 01/07/2023] Open
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de Geus JL, Wambier LM, Boing TF, Loguercio AD, Reis A. At-home Bleaching With 10% vs More Concentrated Carbamide Peroxide Gels: A Systematic Review and Meta-analysis. Oper Dent 2018; 43:E210-E222. [DOI: 10.2341/17-222-l] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objective:
To perform a systematic review to answer the following research question: Is at-home bleaching in adults with more concentrated carbamide peroxide (CP) gels as effective and safe as bleaching performed with 10% carbamide peroxide gels?
Methods and Materials:
A comprehensive search was carried out in the MEDLINE via PubMed, Scopus, Web of Science, LILACS, BBO, Cochrane Library and SIGLE, without restrictions. IADR abstracts (1990 to 2016) and unpublished and ongoing trial registries, dissertations and theses (ProQuest Dissertations and Periodicos Capes Theses Databases) were also searched. The risk of bias of the included studies was analyzed using the Cochrane Risk of Bias tool from the Cochrane Collaboration. We meta-analyzed the data using the random effects model to compare 10% CP and more concentrated CP gels in terms of color change (ΔSGU or ΔE) and risk and intensity of tooth sensitivity (TS). The quality of the evidence was rated using the GRADE approach.
Results:
After the database screening, 182 articles remained, and this number was reduced to 17 after examination of the abstracts and/or full texts. Four articles were follow-ups of earlier studies, and thus we collected 13 studies. Ten studies were at unclear risk of bias, while three were at low risk of bias. Lower risk and intensity of TS was observed for 10% CP. The odds ratio for the risk of TS was 0.41 (95% CI 0.20 to 0.84, p=0.01), and the difference in means for TS intensity was 0.44 (95% CI 0.67 to −0.20, p=0.0003). No significant difference was observed in terms of color change in ΔSGU (difference in means 0.29; 95% CI 0.25 to 0.83, p=0.29) and for ΔE (difference in means −0.16; 95% CI 0.38 to 0.06, p=0.16). Except from the ΔSGU, for which the evidence was graded as low quality, the other outcomes were considered at moderate quality.
Conclusions:
At-home bleaching with 10% CP showed similar bleaching efficacy with lower risk and intensity of TS in comparison with more concentrated carbamide peroxide gels.
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Martins IEB, Onofre S, Franco N, Martins LM, Montenegro A, Arana-Gordillo LA, Reis A, Loguercio AD, da Silva LM. Effectiveness of In-office Hydrogen Peroxide With Two Different Protocols: A Two-center Randomized Clinical Trial. Oper Dent 2018; 43:353-361. [DOI: 10.2341/17-128-c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objectives:
The aim of this study was to compare the bleaching efficacy and tooth sensitivity (TS) of a 38% hydrogen peroxide bleaching agent used for in-office bleaching, applied under different time protocols: a 40-minute application or two 20-minute applications.
Methods and Materials:
Forty-four patients from Brazil and Colombia, with right superior canines darker than C2, were selected for this multicenter, single-blind, randomized trial. The teeth were bleached in two sessions, with a one-week interval between them, in a split-mouth design. The bleaching agent was applied in two 20-minute (2×20) applications or one 40-minute (1×40) application in each session according to the manufacturer's instructions. The color changes were evaluated by using subjective (Vita Classical and Vita Bleachedguide) and objective (Easyshade Spectrophotometer) methods at baseline and 30 days after the second session. Tooth sensitivity was recorded up to 48 hours with a 0-10 visual analog scale. Also, the pH values during the application of bleaching were recorded. Color change in shade guide units and ΔE were analyzed by using the Student t-test (α=0.05). The absolute risk and intensity of TS were evaluated with the McNemar test, the Wilcoxon signed-rank test, and the Friedman test, respectively (α= 0.05).
Results:
Significant whitening was observed in both groups after 30 days of clinical evaluation. The use of a 40-minute application did not significantly influence the absolute risk of TS (68%, 95% confidence interval [CI] = 53-80) as well as the intensity of TS compared with the acid bleaching gel (absolute risk of 82%, 95% CI = 68-91). The pH values did not differ significantly between groups and at the different assessment periods (p=0.42).
Conclusion:
The use of a 40-minute in-office bleaching agent gel application produced the same whitening degree and TS that the two 20-minute bleaching agent applications did. The former preferably should be applied because one 40-minute application does not require gel refreshing.
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Reis A, de Geus JL, Wambier L, Schroeder M, Loguercio AD. Compliance of Randomized Clinical Trials in Noncarious Cervical Lesions With the CONSORT Statement: A Systematic Review of Methodology. Oper Dent 2018; 43:E129-E151. [DOI: 10.2341/17-060-l] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
The literature was reviewed to evaluate the compliance of randomized clinical trials (RCTs) with the CONsolidated Standards of Reporting Trials (CONSORT ) and the risk of bias of these studies through the Cochrane Collaboration risk of bias tool (CCRT). RCTs were searched at Cochrane Library, PubMed, and other electronic databases to find studies about adhesive systems for cervical lesions. The compliance of the articles with CONSORT was evaluated using the following scale: 0 = no description, 1 = poor description, and 2 = adequate description. Descriptive analyses about the number of studies by journal, follow-up period, country, and quality assessments were performed with CCRT for assessing risk of bias in RCTs. One hundred thirty-eight RCTs were left for assessment. More than 30% of the studies received scores of 0 or 1. Flow chart, effect size, allocation concealment, and sample size were more critical items, with 80% receiving a score of 0. The overall CONSORT score for the included studies was 15.0 ± 4.8 points, which represents 46.9% of the maximum CONSORT score. A significant difference among countries was observed (p<0.001), as well as range of year (p<0.001). Only 4.3% of the studies were judged as at low risk; 36.2% were classified as having unclear risk and 59.4% as having high risk of bias. The adherence of RCTs evaluating adhesive systems to the CONSORT is low with unclear/high risk of bias.
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Assemany P, Marques IDP, Calijuri ML, Lopes da Silva T, Reis A. Energetic valorization of algal biomass in a hybrid anaerobic reactor. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 209:308-315. [PMID: 29306840 DOI: 10.1016/j.jenvman.2017.12.054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 12/13/2017] [Accepted: 12/20/2017] [Indexed: 06/07/2023]
Abstract
This study evaluated the operation of a hybrid anaerobic reactor fed with algal biomass cultivated in effluent from the brewery industry. Three stages of operation were distinguished during the 72 days of semi-continuous functioning of the reactor: Stage 1 (S1), in which algal biomass was used as substrate; Stage 2 (S2), in which 10% (v/v) of the algal biomass was substituted by olive mill wastewater (OMW); and Stage 3 (S3), in which algal biomass was heat pre-treated. During S1, a loss of solids was observed, with an increment of organic matter in the outlet. The substitution of 10% of the volume of algal biomass by OMW tripled the methane productivity obtained in the previous stage by digestion of pure algal biomass. Heat pre-treatment was not efficient in rupturing the cell wall, and consequently did not have any effect on the increase in biogas production. The complementarity of substrates in the assessed conditions led to better results than the pre-treatment of the algal biomass.
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Paula DM, Loguercio AD, Reis A, Feitosa VP. Avaliação do Microcisalhamento de um Cimento Resinoso na Zircônia Tratada com Primers com Diferentes Concentrações de 10-MDP. JOURNAL OF HEALTH SCIENCES 2018. [DOI: 10.17921/2447-8938.2017v19n5p118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
O trabalho teve como objetivo avaliar a resistência de união ao microcisalhamento de um cimento resinoso dual convencional sobre a zircônia tratada com com primers com diversos iniciadores e diferentes concentrações de 10-MDP. Para isso, foram preparados os primers experimentais utilizando o 10-metacriloiloxi-decilo-di-hidrogenofosfato (10-MDP) nas concentrações 5, 10 e 20% como monômero funcional ácido, além da canforoquinona /amina terciária (CQ) ou 1-fenil-1,2-propanodiona (PPD) como sistemas fotoiniciadores. O iniciador cerâmico Clearfil Ceramic Primer (Kuraray) foi utilizado como primer controle comercial. O pH dos primers foi analisado previamente. Depois da aplicação dos primers sobre a zircônia, o cimento resinoso dual (RelyX ARC, 3M) foi aplicado com o auxílio de tubo cilíndrico de borracha e foto-polimerizado. Foi avaliado também o cimento sem primer como controle negativo. Após 24 horas de armazenamento em água destilada foi realizado o teste microcisalhamento (n9). A análise estatística foi realizada por ANOVA e teste de Tukey (p<0,05). O Clearfil (14,0±1,2 MPa), CQ5 (13,4±2,1 MPa) e PPD5(12,8±1,8 MPa) apresentaram as maiores resistências de união sem diferença estatística entre si. O controle negativo apresentou a pior resitência de união. Portanto, a presença do primer para zircônia é de suma importância no protocolo de cimentação e o 10-MDP deve ser utilizado em baixas concentrações.Palavras-chave: 10-methacryloyloxydecyl Dihydrogen Phosphate. Shear Bond Strength. Zirconia.
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Cardenas AFM, Siqueira FSF, Reis A, Bandeca MC, Hass V, Gomes JC, Feitosa VP, Loguercio AD. Impacto do pH e Tempo de Aplicação do Ácido Meta-Fosfórico na Longevidade da Interface Resina-Dentina. JOURNAL OF HEALTH SCIENCES 2018. [DOI: 10.17921/2447-8938.2017v19n5p150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Avaliar o efeito de diferentes pHs do ácido meta-fosfórico 40% (MPA) em comparação com o ácido ortofosfórico convencional 37% (OPA) em diferentes tempos de aplicação na longevidade da resistência da união (µTBS), nanoinfiltração (NL) e alterações químicas (ATR-FTIR) da superfície dentinária. Molares humanos (n84) foram distribuídos aleatoriamente em 12 condições experimentais de acordo com a combinação de variáveis: Ácido [ácido ortofosfórico 37% (OPA), ácido metafosfórico 40% (MPA) em pH 0,5, 1 e 2] e Tempo de Aplicação [7, 15 e 30s]. Os dentes foram restaurados e seccionados para se obter palitos de resina-dentina para µTBS e NL testados imediatamente ou após 6 meses de armazenamento em água. Para NL, 3 palitos de cada dente/período foram analisados. 21 dentes foram utilizados para as análises químicas (ATR-FTIR) de acordo com o tempo de aplicação vs. tempo de armazenamento. Os dados foram submetidos a ANOVA de três fatores e teste de Tukey (a0,05). MPA pH 0,5 mostrou µTBS semelhante ao OPA, independentemente do tempo de aplicação (p> 0,05). Foram observadas diminuições significativas na µTBS e aumentos de NL somente para OPA após 6 meses (p0,001). OPA proporcionou valores de NL estatisticamente mais elevados do que MPA (p 0,003). Em ATR-FTIR, dentina desmineralizada representou picos de brushite e fosfato octacálcico. Contudo, os resultados de MPA foram dependentes do pH/tempo de aplicação. O uso de MPA preservou a interface resina-dentina em um período de 6 meses apresentado a presença de brushite e fosfato octacálcicoPalavras-chave: Adesivos Dentinário. Resistência à Tração. Ácidos Fosfóricos.
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Martins BC, De Paula DM, Loguercio AD, Reis A, Feitosa VP. A Falta de Neutralização de Primers com 10-MDP pela Zircônia Pode Afetar no Grau de Conversão do Cimento Resinoso. JOURNAL OF HEALTH SCIENCES 2018. [DOI: 10.17921/2447-8938.2017v19n5p92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
O objetivo deste trabalho foi avaliar diferentes concentrações de 10-MDP incluídas em primers cerâmicos experimentais e comerciais e o efeito sobre o grau de conversão (GC) de um cimento resinoso dual convencional. Os primers cerâmicos experimentais foram formulados utilizando o10-metacriloiloxi-decil-dihidrogenofosfato (10-MDP) nas concentrações 5, 10, 20 e 40% como monômero funcional ácido e canforoquinona /amina terciária (CQ) ou 1-fenil-1,2-propanodiona (PPD) como sistemas fotoiniciadores. O primer cerâmico Clearfil Ceramic Primer (Kuraray) foi utilizado como primer controle comercial. O pH dos primers foi analisado com medidor digital de pH. A espectroscopia Micro-Raman foi usada para avaliar o GC pelas razões das alturas dos picos 1639/1609 cm-1 do cimento resinoso não-polimerizado e polimerizado aplicado após os primers cerâmicos na superfície de um bloco de zircônia. A análise estatística foi realizada por ANOVA one-way e teste de Tukey (p<0,05). A alta concentração (40%) de 10-MDP em primers experimentais não foi tamponada pela ZrO2 e reduziu a GC do cimento resinoso quando utilizado o primer com CQ (63,4 ± 4,9 %) e PPD (44,6 ± 4,2 %), o que não ocorreu com 10-MDP de baixa concentração (5%) no primer comercial (88,9 ± 1,9 %) e nos experimentais CQ (94,7±1,5 %) e PPD (92,0±3,1 %). O monômero 10-MDP deve ser utilizado em baixas concentrações em primers para zircônia para evitar a redução na polimerização do cimento resinoso. Apoio: FGM. Palavras-chave: Metacrilato. Grau de Conversão. Espectroscopia Raman. Zircônia.
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Parreiras SO, Favoreto MW, Cruz GP, Cartagena AF, Gomes A, Borges CPF, Loguercio A, Reis A. Difusão do Peróxido de Hidrogênio em Dentes Submetidos a Diferentes Protocolos de Clareamento. JOURNAL OF HEALTH SCIENCES 2018. [DOI: 10.17921/2447-8938.2017v19n5p131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Objetivos: avaliar a concentração de Peróxido de Hidrogênio (PH) que alcança a câmara pulpar, utilizando géis clareadores de mesma marca comercial. Métodos: 90 pré-molares foram divididos em 9 grupos de acordo com o tratamento: Controle (sem tratamento clareador) [C], Peróxido de Carbamida (PC) 10% [PC10%], PC 16% [PC16%], PC 22% [PC22%], Peróxido de Hidrogênio (PH) 4% [PH4%], PH 6% [PH6%], PH 7 ½% [PH7 ½%], PH 10% [PH10%] e PH 35% [PH35%]. Os dentes foram seccionados e inserido tampão de acetato na câmara pulpar. Os géis clareadores foram aplicados de acordo com as recomendações dos fabricantes. A solução de tampão foi removida e adicionada a esta, soluções de leucocristal violeta e enzima peroxidase. Os dados foram submetidos a ANOVA e teste de Tukey para contraste das médias (a 0,05). Resultados: Maior quantidade de PH foi observado em protocolo de consultório [PH 35%] quando comparado com clareamento caseiro (p 0,000). Não houve diferença estatisticamente significante (p 0,649) entre os protocolos caseiros. O [PC 10%] libera aproximadamente 3,5% de PH, o qual se difunde na câmara pulpar em quantidades semelhantes ao grupo [PH 4%]. Os grupos [PC 22%] e [PH 10%] também foram similares. Conclusões: A quantidade de PH que alcança a câmara pulpar não é proporcional a concentração inicial de PH dos géis clareadores.Palavras-chave: Peróxido de Hidrogênio. Clareamento Dental. Permeabilidade do Esmalte Dentário.
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Martini EC, Loguercio AD, Szesz AL, Parreiras SO, Reis A. Efeito de Restaurações que Apresentam Resina Composta Fluida em Lesões Cervicais não Cariosas: Revisão Sistemática e Metanálise. JOURNAL OF HEALTH SCIENCES 2018. [DOI: 10.17921/2447-8938.2017v19n5p25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
O objetivo foi avaliar se a resina composta fluida em lesões cervicais não cariosas (LCNCs) melhora as taxas de retenção, descoloração marginal e adaptação, em pacientes adultos, por meio de uma revisão sistemática e metanálise. Foram pesquisadas sem restrições as bibliotecas Medline, Scopus, Web of Science, Lilacs, BBO, Cochrane Library e SIGLE (bases cinzentas), resumos do IADR e registros de ensaios clínicos (REBEC). Dissertações e teses também foram pesquisadas através das bases de dados ProQuest Dissertações e Periódicos Capes Teses. Foram incluídos apenas ensaios clínicos randomizados que compararam as restaurações com resina composta fluida e resina composta de viscosidade regular em LCNCs. A ferramenta da Cochrane Collaboration foi utilizada para avaliar o risco de viés dos estudos elegíveis. A ferramenta GRADE foi usada para avaliar a qualidade da evidência para cada estudo, de acordo com seus resultados. Após a remoção de duplicatas e avaliação por títulos e abstracts, 8 estudos mantiveram-se para a análise qualitativa. Não foi observada diferença significativa entre os grupos quanto a retenção nem descoloração marginal em todos os períodos avaliados (1 a 3 anos). Observou-se melhor adaptação marginal para as restaurações que foram realizadas com resina fluida. A qualidade da evidência foi classificada como moderada para perda ou retenção aos 3 anos e baixa e/ou muito baixa para todos os outros desfechos. Concluiu-se que a viscosidade da resina composta não influencia as taxas de retenção e descoloração marginal das restaurações em LCNCs.Palavras-chave: Lesões Cervicais. Flow. Ensaio Clínico Randomizado. Revisão Sistemática.
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Sutil E, Malaquias P, Reyes MFG, Matos T, Hanzen T, Reis A, Loguercio A, Perdigão J. Adesivos Universais de Condicionamento Total e Restaurações Indiretas em Resina com Polimerização Dual: Propriedades Adesivas. JOURNAL OF HEALTH SCIENCES 2018. [DOI: 10.17921/2447-8938.2017v19n5p282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Avaliou-se a resistência ao microcisalhamento (RUM) e a nanoinfiltração (NI) de adesivos universais aplicados como sistemas convencionais em restaurações indiretas com ou sem ativador de autopolimerização (AA) usando diferentes protocolos de polimerização. Utilizou-se dentina oclusal de 55 molares humanos. Os espécimes foram alocados aleatoriamente para: All-Bond Universal / Core Flo DC [ABU] Clearfil Universal Bond / Clearfil DC Core Plus [CFU] Prime & Bond Elect / FluoroCore 2+ [PBE] e One Coat 7 Universal / ParaCore [OCU]. O Clearfil SE Bond / Clearfil DC Core Plus [CSE] foi utilizado como controle. Para CFU, PBE e OCU, foram utilizados protocolos de fotopolimerização [FP], polimerização dual [DP] e autopolimerização [AP]. Testes ANOVA e Tukey foram utilizados (a 0,05). RUM: Modo FP - ABU resultou em RUM menor do que todos os outros adesivos FP. Modo DP - CSE mostrou resultado maior do que CBU e OCU, porém semelhante ao PBE. Modo AP - PBE resultou em RUM menores que os modos PBE / DP e FP. Para CBU e OCU, não houve diferença nos modos FP, DP e AP. NI: ABU resultou em NI menor que o modo PBE / FP, mas semelhante ao modo CBU / FP e OCU / FP. O modo CSE / DP resultou em NI maior em comparação com todos os adesivos universais DP. O modo CFU / AP resultou em NI maior que CFU / FP e modo DP. PBE / FP e DP resultaram em NI maior que o modo PBE / AP. O modo OCU / DP resultou em NI maior do que OCU / FP e modo AP. Para os adesivos universais, AA e os diferentes protocolos de polimerização influenciaram o RUM e NI todavia, esta influência foi adesivo- dependente.Palavras-chave: Microcisalhamento. Nanoinfiltração. Restaurações Indiretas.
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Araújo Neto VG, Nobre CFA, De Paula DM, Moreira MM, Loguercio AD, Reis A, Feitosa VP. Influência das Partículas de Carga na Sorção, Solubilidade, Adesão e Micropermeabilidade de Sistemas Adesivos Universais. JOURNAL OF HEALTH SCIENCES 2018. [DOI: 10.17921/2447-8938.2017v19n5p123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
O objetivo foi avaliar sorção, solubilidade, micropermeabilidade e a resistência de união de um adesivo universal comercial contendo ou não partículas de carga. O adesivo Ambar Universal (FGM) foi usado como convencional (C) ou autocondicionante (A) diferenciando-se apenas na presença (CC e AC) ou não (CS e AS) de partículas de carga. Doze terceiros molares (n3) foram restaurados com rodamina-B no adesivo e foi infiltrada fluoresceína para avaliação da micropermeabilidade por microscopia confocal. Outros vinte e quatro terceiros molares (n6) foram restaurados e cortados em palitos de resina-dentina (1 mm2) para avaliar a resistência de união à microtração (μTBS) após 24h de armazenagem em água. Sorção e solubilidade foram testadas em discos dos adesivos (ISO 4049). Os resultados foram analisados com ANOVA e teste de Tukey (p<0,05). A análise estatística revelou maior sorção de água do adesivo com carga em relação ao sem carga. Maior micropermeabilidade foi observada na interface adesivo- dentina do autocondicionante com carga e os outros apresentaram pouca micropermeabilidade. Independente da presença de carga, os adesivos autocondicionantes apresentaram maior μTBS que os convencionais (p<0,05). Em conclusão, a presença de partículas de carga no adesivo universal leva a maior sorção de água e a maior micropermeabilidade da interface em comparação ao mesmo adesivo sem carga.Palavras-chave: Adesivos Dentinários. Dentina. Microscopia Confocal.
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Siqueira FSF, Cardenas AFM, Martini EC, Reis A, Hass V, Loguercio AD, Gomes JC. Avaliação das Propriedades Adesivas de Sistemas Adesivos Universais na Interface Resina- Dentina Erosionada. JOURNAL OF HEALTH SCIENCES 2018. [DOI: 10.17921/2447-8938.2017v19n5p148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Avaliar a resistência de união (TBS) e nanoinfiltração (NL) de sistemas adesivos universais em dentina erosionada (DE) na estratégia self-etch e etch-and-rinse. Duzentos molares foram aleatoriamente distribuídos de acordo com a combinação das variáveis independentes: Superfície dentinária (dentina sadia e dentina erosionada) vs. Sistema adesivo [1) All Bond Universal 2) Ambar Universal 3) Clearfil Universal 4) Futurabond Universal 5) One Coat 7 Universal 6) Peak Universal Bond 7) Prime & Bond Elect 8) Scotchbond Universal 9) Tetric N-Bond Universal 10) Xeno Select] vs. estratégia adesiva [self-etch (SE) e etch-and-rinse (ER)]. Para desafio erosivo, foram realizados ciclos de/remineralização por 10 dias com ácido cítrico. Após aplicação e fotoativação dos sistemas adesivos de acordo as instruções do fabricante, os dentes foram restaurados, armazenados em água por 24 h, seccionados em “palitos” e submetidos ao teste de microtração sob tensão (0,5 mm/min). 3 palitos de cada dente foram imersos em solução de nitrato de prata para análise de NL por microscopia eletrônica de varredura. Os dados foram analisados por ANOVA três fatores e teste de Tukey (5%). Os valores de TBS em DE foi estatisticamente inferior à dentina sadia, independente da estratégia adesiva (p<0,01). Em DE não houve diferença entre as estratégias adesivas (p>0,61). Uma maior deposição de nitrato de prata foi observada em DE (p <0,002). A erosão diminuiu a TBS, aumentou a NL independente da estratégia adesiva e as variações na composição dos adesivos produziu diferentes desempenhos.Palavras-chave: Adesivos Dentinários. Resistência à Tração. Erosão Dentária.
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Lopes da Silva T, Passarinho PC, Galriça R, Zenóglio A, Armshaw P, Pembroke JT, Sheahan C, Reis A, Gírio F. Evaluation of the ethanol tolerance for wild and mutant Synechocystis strains by flow cytometry. ACTA ACUST UNITED AC 2018; 17:137-147. [PMID: 29556479 PMCID: PMC5856660 DOI: 10.1016/j.btre.2018.02.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/31/2018] [Accepted: 02/13/2018] [Indexed: 01/28/2023]
Abstract
Flow cytometry was used to evaluate the effect of initial ethanol concentrations on cyanobacterial strains of Synechocystis PCC 6803 [wild-type (WT), and ethanol producing recombinants (UL 004 and UL 030)] in batch cultures. Ethanol recombinants, containing one or two metabolically engineered cassettes, were designed towards the development of an economically competitive process for the direct production of bioethanol from microalgae through an exclusive autotrophic route. It can be concluded that the recombinant Synechocystis UL 030 containing two copies of the genes per genome was the most tolerant to ethanol. Nevertheless, to implement a production process using recombinant strains, the bioethanol produced will be required to be continuously extracted from the culture media via a membrane-based technological process for example to prevent detrimental effects on the biomass. The results presented here are of significance in defining the maximum threshold for bulk ethanol concentration in production media.
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Cardenas A, Siqueira F, Bandeca M, Costa S, Lemos M, Feitora V, Reis A, Loguercio A, Gomes J. Impact of pH and application time of meta-phosphoric acid on resin-enamel and resin-dentin bonding. J Mech Behav Biomed Mater 2018; 78:352-361. [DOI: 10.1016/j.jmbbm.2017.11.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 11/15/2017] [Accepted: 11/17/2017] [Indexed: 10/18/2022]
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Schroeder M, Matos TP, Hanzen T, Gutierrez M, Reis A, Loguercio A. Evaporation time: Aging adhesive properties of universal adhesives to dentin. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gutiérrez M, Mendez-Bauer L, Alegría-Acevedo L, Dávila-Sánchez A, Bermudez J, Nuñez A, Reis A, Loguercio A, Farago P, Fernandez E. Effect of zinc/copper nanoparticles on bonding to artificially caries-affected dentin. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Gutiérrez M, Alegría-Acevedo L, Mendez-Bauer L, Bermudez J, Dávila-Sánchez A, Reis A, Loguercio A, Farago P, Fernandez E. Adhesive performance of universal adhesives containing zinc-oxide and copper nanoparticles. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Sutil E, Kunstmann L, Gutiérrez M, Malaquias P, Reis A, Perdigão J, Loguercio A. Microshear bond strengths of nine CAD/CAM restoratives materials. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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