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1.
Rev. Assoc. Paul. Cir. Dent ; 70(1): 70-75, jan.-mar. 2016. ilus, tab
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-797056

ABSTRACT

Objetivo: avaliar a influencia da contaminação cavitária na adaptação marginal das restauraçõesde resina composta e a associação da lisozima ao sistema adesivo. Materiais e Métodos:Foram selecionados 40 terceiros molares permanentes e confeccionados preparos cavitários classeV com pontas diamantadas cilíndricas 1090 (4 mm de largura, 6 mm de comprimento e 1,5 mmde profundidade). Todos os dentes foram esterilizados e divididos aleatoriamente em 4 grupos(n=10): G1: sistema adesivo (SA) e restauração com resina composta (RC); G2: cavidadescontaminadas com 10 μl de Streptococcus mutans (0,5 de Mc Farland), SA e RC; G3:sistema adesivo associado com lisozima (ADL) e RC e G4: cavidades contaminadas com 10 μlde Streptococcus Mutans (0,5 de Mc Farland), ADL e RC. A lisozima foi adicionada ao SA com ummicrobrush embebido no SA e na lisozima em pó. Os dentes foram impermeabilizados e imersosem azul de metileno por 4 horas a 37ºC. Os dentes foram seccionados e fotografados. Resultados:A avaliação da microinfiltração foi feita por dois avaliadores utilizando o Programa Tpsdig. Paraavaliar a calibração entre os examinadores, foi utilizado o teste de Correlação de Pearson. As médiasdas porcentagens de fendas e bolhas foram submetidas ao teste de Kruskal Wallis com 5% designificância. Conclusão: a contaminação cavitária com Streptococcus mutans acarretou na formaçãode fendas entre a resina composta e as margens cavitárias. A lisozima associada ao sistemaadesivo não influenciou na formação de fendas e bolhas nas restaurações de resina composta.


Objective: evaluate the influence of cavity contamination on marginal adaptation of compositerestorations and the association of lysozyme to the adhesive system. Materials and Methods:Were selected 40 permanent third molars and made cavity preparations class V with cylindricaldiamond burs 1090 (4 mm wide, 6 mm long and 2 mm deep). All teeth were sterilized and randomlydivided into 4 groups (n = 10): G1: adhesive system (SA) and restoration with compositeresin (CR); G2: cavity contaminated with 10 μl of Streptococcus mutans (0.5 McFarland), SA andRC; G3: adhesive system associated with lysozyme (ADL) and RC and G4: cavity contaminated with10 μl of Streptococcus mutans (0.5 Mc Farland), ADL and RC. Lysozyme was added to the SA witha microbrush embedded in the SA and powdered lysozyme. The teeth were sealed and immersedin a methylene blue for 4 hours at 37 ° C. The teeth were sectioned and photographed. Results:The evaluation of microleakage was made by two reviewers using the Tpsdig Program. To assessthe calibration of examiners, we used the Pearson correlation test. The mean percentages of cracksand bubbles were submitted to Kruskal Wallis test at 5% significance level. Conclusion: the cavityStreptococcus mutans contamination resulted in the formation of cracks between the compositeresin and the cavity margins. Lysozyme associated with the adhesive system did not influence theformation of cracks and bubbles in the composite restorations.


Subject(s)
Humans , Male , Female , Dentin-Bonding Agents/analysis , Dentin-Bonding Agents/adverse effects , Dentin-Bonding Agents/therapeutic use , Dental Leakage/complications , Streptococcus mutans/classification , Streptococcus mutans/growth & development , Streptococcus mutans/virology
2.
Belo Horizonte; s.n; 2015. 154 p. ilus, graf, tab.
Thesis in Portuguese | LILACS, BBO - Dentistry | ID: lil-790309

ABSTRACT

O sistema de cimentação e sua fotoativação, a profundidade do condutor radicular e a morfologia da dentina podem influenciar a resistência de união de pinos cimentados ao conduto radicular. Este estudo in vitro, em caráter hipotético, avaliou o efeito de sistemas resinosos e dos níveis de acesso ao conduto na resistência de união de pinos de fibra de vidro cimentados ao conduto radicular. Foram utilizados 135 dentes bovinos, distribuídos de acordo com um delineamento em blocos completos aleatorizados. As coroas foram seccionadas na junção cemento-esmalte e as raízes receberam tratamento endodôntico, preparo e cimentação de pinos de fibra de vidro Reforpost nº3 (Angelus), usando os seguintes sistemas: RelyX ARC/Adper Scotchbond Multi-Purpose plus (3M ESPE); C&B/All-Bond 2 (Bisco) e RelyX U200 (3M ESPE). As raízes foram então divididas, de acordo com o nível de acesso ao conduto: coronal, médio e apical, formando 9 grupos em estudo (n=15). Depois da cimentação, foram obtidos dois espécimes em cada terço radicular, com 1,0 mm de espessura. Foi realizado o ensaio de resistência ao cisalhamento por extrusão, usando célula de carga de 20N e velocidade de 0,5mm/min, e registrada a força máxima (MPa) para o deslocamento do pino. Os espécimes foram examinados em estereoscópio para identificação do modo de fratura. Imagens foram obtidas por microscopia eletrônica de varredura para a avaliação da linha de cimentação. O efeito dos fatores em estudo e de sua interação sobre a resistência de união nos terços coronal, médio e apical do conduto foi verificado por ANOVA e teste de Tukey (p≤0,05). Quando o acesso ao conduto foi feito no terço coronário, o sistema d cimentação (p=0,790), o terço radicular avaliado (p=0,224), e a interação (p=0,443) não mostraram efeito significativo...


Subject(s)
Humans , Animals , Cattle , Dentin-Bonding Agents/adverse effects , Resin Cements/adverse effects , Cementation , In Vitro Techniques , Post and Core Technique , Dental Pins
3.
Braz. j. oral sci ; 11(4): 428-432, Oct.-Dec. 2012.
Article in English | LILACS, BBO - Dentistry | ID: lil-668667

ABSTRACT

The dental pulp may be exposed to several irritants that are potentially noxious to the health and functions of this tissue. Each type of irritant or injury has different effects on the pulp, which are generally characterized by acute inflammation, chronic inflammation or necrosis. Common examples of irritants are dental caries, cavity preparation procedures, traumatic injuries, and chemical substances like bleaching agents and adhesive systems. The present study aimed to review the current knowledge about the effect of bleaching agents and adhesive systems in the human dental pulp. The review covered literature from 2004 to 2009, and only relevant manuscripts were included. Hand search of the references completed the review. Based on literature review, it may be concluded that all dental procedures associated with bleaching agents or adhesive systems involve risks to cause pulp damage. However, these risks can be minimized if the causal factors were known and avoided.


Subject(s)
Dentin-Bonding Agents/adverse effects , Bleaching Agents/adverse effects , Dental Pulp , Dental Pulp/injuries
4.
Full dent. sci ; 2(8): 383-387, 20110709.
Article in Portuguese | LILACS, BBO - Dentistry | ID: biblio-850857

ABSTRACT

Considerando a importância do procedimento de cimentação adesiva para as restaurações indiretas, o propósito desse estudo foi analisar o tipo de falha ocorrida sob diferentes tratamentos de superfície e após ensaio de microtração entre dois substratos (zircônia Y-TZP e resina composta). Assim, 16 blocos (12mm X 12mm X 4mm) de uma zircônia completamente sinterizada foram polidos e divididos em 04 grupos de acordo com o tratamento de superfície a ser realizado sobre a zircônia: jateamento (G1), jateamento + “primer universal” (G2), “primer universal” (G3), e NaOH + “primer universal” (G4), previamente ao procedimento de cimentação. Os blocos de zircô-nia foram cimentados aos blocos de resina composta (12mm X 12mm X 4mm) previamente confeccionados e fotopolimerizados para em seguida serem cortados sob abundante refrigeração a fim de produzir secções de 0,8mm X 0,8mm X 8mm. Os “palitos” obtidos foram ensaiados em máquina universal de ensaios para detectar o tipo de falha ocorrida, que foi classificada em adesiva, coesiva ou mista. Os resultados evidenciaram uma maior percentagem de falhas mistas para os grupos G2 e G4 (65,2% e 67,3%, respectivamente), enquanto que o G3 apresentou maior percentagem de falhas adesivas (75,6%). Concluiu-se que o tratamento de superfície com jateamento com óxido de alumínio sobre a superfície da zircônia (G1) não é recomendado para a zircônia do tipo Y-TZP


Considering the importance of the adhesive cementation procedure for indirect restoration, the aim of this study was to analyze the failure kind met under different surface treatment and after microtensile test between two substrates (zirconia Y-TZP and resin composite). In this way, 16 blocks (12mm X 12mm X 4mm) of a zirconia completely sintering were polished and divided into 04 groups according to the surface treatment to be executed over the zirconia: sandblast (G1); sandblast + universal primer (G2); universal primer (G3); NaOH + universal primer (G4), previously to the cementation procedure. The zirconia blocks were cemented into the resin composite blocks (12mm X 12mm X 4mm) previously done and photopolimerized, to be in the sequence cut under copious refrigeration to produce sections of approximately 0.8mm x 0.8mm X 0.8mm. These obtained sticks were tested in a universal machine to detect the kind of failure, which was classified in adhesive, cohesive or mix. The results showed a higher percentage of mix failure to the group G2 and G4 (65.2% e 67.3%, respectively), while the group G3 showed a higher percentage of adhesive failure (75.6%). It was concluded that the sandblast treatment surface with aluminum oxide over the zirconia surface wasn’t recommended to the Y-TZP zirconia


Subject(s)
Dentin-Bonding Agents/adverse effects , Ceramics , Cementation/methods , Dental Bonding , Dentin-Bonding Agents , Materials Testing , Composite Resins/chemistry
5.
Quintessence Int ; 41(10): e192-9, 2010.
Article in English | MEDLINE | ID: mdl-20927415

ABSTRACT

OBJECTIVE: As resin-modified glass-ionomer cement (RMGIC) is an adhesive material, its association to dentin bonding agents (DBAs) was previously proposed. This study investigated the adjunctive behavior of an RMGIC with etch-and-rinse bonding systems under in situ/ex vivo cariogenic challenge. METHOD AND MATERIALS: Bovine enamel blocks (3 3 3 3 2 mm) were randomly assigned to group VP, Vitremer + its own primer (3M ESPE); group VSB, Vitremer + Single Bond (3M ESPE); and group VPB, Vitremer + Prime and Bond 2.1 (Dentsply). Two blocks of each group were randomly placed in an acrylic palatal appliance, so each appliance included six blocks. Volunteers (n = 10) wore these appliances according to given instructions to promote a sucrose challenge eight times/day for 15 days. After this period, the blocks were removed from the devices and cleaned, and demineralization was assessed through longitudinal microhardness analysis (Knoop indenter, 25 g/5 s). Data were submitted to three-way ANOVA and Tukey test (P < .05). RESULTS: No treatment was able to completely avoid demineralization. All materials showed a statistically significant difference in mineral loss when the microhardness on the outer enamel was compared with deeper regions (P < .05). CONCLUSION: Association of the tested RMGICs with etch-and-rinse DBAs did not seem to be more beneficial against caries than the conventional treatment with RMGIC.


Subject(s)
Cariostatic Agents/therapeutic use , Dentin-Bonding Agents/adverse effects , Glass Ionomer Cements/therapeutic use , Resin Cements/adverse effects , Tooth Demineralization/prevention & control , Acetone/adverse effects , Analysis of Variance , Animals , Bisphenol A-Glycidyl Methacrylate/adverse effects , Cattle , Composite Resins/therapeutic use , Cross-Sectional Studies , Dental Enamel , Drug Interactions , Glass Ionomer Cements/chemistry , Hardness , Humans , Polymethacrylic Acids/adverse effects , Statistics, Nonparametric
6.
Rev. Assoc. Paul. Cir. Dent ; 63(2): 112-115, mar.-abr. 2009. tab, graf
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-534144

ABSTRACT

O objetivo deste artigo foi avaliar comparativamente a resistência adesiva às forças de cisalhamento de dois sistemas adesivos, um convencional e um autocondicionante, em esmalte de dente bovino. Trinta e dois fragmentos foram usados e divididos aleatoriamente em dois grupos experimentais: G1 - adesivo convencional e G2 - autocondicionante. Para a polimerização dos corpos-de-prova e do adesivo foi usado um LED com intensidade de 1200 mW/cm2. As amostras foram estocadas por 48h e submetidas ao teste de cisalhamento na máquina de teste universal modelo (TIRAtest 2420), com a velocidade de 0.5 mm/min e carga de célula de capacidade máxima 2000 N. Os valores médios de resistência adesiva obtidos para o GI foi de 11,22 MPa e para o G2, 4,43 MPa. Após a aplicação do teste t student foi possível mostrar que havia diferença estatística entre os grupos, o grupo G1 apresentou valores de resistência adesiva maior que o grupo G2. Os adesivos convencionais apresentam adesão significantemente maior ao esmalte que o adesivo autocondicionante.


The aim of this study was to comparatively evaluate adhesive resistance of two adhesive systems, a conventional and a self-conditioning in bovine teeth enamel through shear tests. Thirty-two fragments of bovine teeth were used and divided randomly into two experimental groups: G1 with conventional adhesive and G2 with self-conditioning adhesive. To make the light-curing process in the adhesive and in resin cylinders, there was used a LED with intensity of 1200m/cm2. The proof-bodies were stored by 02 (two) days in a closed container. Subsequently they were submitted to shear test in a universal mechanic testing machine, model TIRAtest 2420, in the speed of 0.5 mm/min with a load cell of 2000N maximum capacity. The value of the average resistance obtained for the GI was 11 ,22 MPa and for G2 it was 4,43 MPa. After applying the test t student with statistical analysis of significance in which p<0.05, it was possible to conclude that this difference is statistically significant. From the results of this research it's acquirable that, the conventional adhesive system showed superior if compared to the self-conditioning.


Subject(s)
Animals , Cattle , Dentin-Bonding Agents/adverse effects , Shear Strength
7.
Arq. odontol ; 43(4): 149-154, out.-dez. 2007. tab
Article in English | LILACS, BBO - Dentistry | ID: lil-533415

ABSTRACT

This study assessed the influence of the application of bonding agents prior to or after matrix and wedge placement in the radiographic view of the adhesive layer in cervical walls of Class II composite resin restorations and correlated the findings with marginal leakage. Standard cavities were prepared in the mesial and distal faces of human molars, with cervical margins placed in dentin/cementum. Restorations were made using metallic matrix bands and wooden wedges. The microhybrid composite Filtek Z250 (3M ESPE) and two adhesive systems – Single Bond 2 (SB-3M ESPE) and Scotchbond Multi-Purpose (SMP-3M ESPE) – were used, thus defining five groups (n= 12): [SB1] and [SMP1]- matrix and wedge placed after bonding application; [SB2] and [SMP2]-matrix and wedge placed prior to bonding application; [Control] – restorations without adhesive system. Bitewing radiographs from each tooth were obtained and the view or not of the adhesive layer in the cervical wall of each restoration was observed under magnification (40x). Specimens were thermalcycled and dye penetration (0.5% basic fuchsine) evaluated under magnification (40x). Data were submitted to Kruskal-Wallis and Spearman correlation tests (p=0.05). The placement of matrix and wedge before bonding agent application increased the view of the adhesive layer only for SB (p<0.001). Matrix did not influence marginal leakage, and no significant relationship between radiographic view of adhesive layerand marginal leakage (r=-0.020; p =0.877) could be observed. In conclusion, SB presented better sealingability than SMP (p<0.01).


Subject(s)
Humans , Dentin-Bonding Agents/adverse effects , Dental Leakage/diagnosis , Composite Resins/adverse effects , Radiography, Bitewing , Dental Restoration, Permanent/adverse effects
8.
Quintessence Int ; 38(6): e348-54, 2007 Jun.
Article in English | MEDLINE | ID: mdl-17625624

ABSTRACT

OBJECTIVES: To evaluate the tissue reaction of some pulpar protecting materials. METHOD AND MATERIALS: Standardized implants of calcium hydroxide (CH), glass-ionomer cement (GIC), and light-cured dentin adhesive (LDA), surgically introduced into the dorsal connective tissue of Wistar rats, were left for 15 and 30 days. For each of the 2 experimental times, a respective sham group (S) was studied. After experimentation, animals were sacrificed, and the material from implant sites was removed and studied with light microscopy and stereology (volume density of interstitial fibrosis, Vv[f], and numerical density of mast cells per area, NA[mast cell]). The implants and the surfaces of the fibrous capsule were analyzed with scanning electronic microscopy (SEM) adapted with microanalysis. RESULTS: The CH group had the smallest value of Vv[f] and the LDA group the greatest. At day 30, the Vv[f] of the LDA group showed an increase of 30% and was different from that of the CH group in the same period (P <.05). The NA[mast cell] was smaller in both the CH and the S group than in the LDA group (P <.05). The GIC group had intermediate values for Vv[f] and NA[mast cell] between CH and LDA values. There was light fibrosis in the surgical area with few mast cells associated to vessels in the S group. SEM detected presence of silica fragments in the fibrous capsule of the LDA group and calcium in the fibrous capsule of the CH group. CONCLUSIONS: All tested materials allowed healing of the implanted area; tissue reaction was smallest in the CH group.


Subject(s)
Calcium Hydroxide/adverse effects , Dental Materials/adverse effects , Dentin-Bonding Agents/adverse effects , Fibrosis/chemically induced , Glass Ionomer Cements/adverse effects , Animals , Implants, Experimental/adverse effects , Male , Mast Cells/drug effects , Rats , Rats, Wistar
10.
Odonto (Säo Bernardo do Campo) ; 13(25): 52--58, jan.-jun. 2005. graf
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-428151

ABSTRACT

Este estudo teve como objetivo avaliar o grau de microinfiltração marginal de restaurações de resina composta. Os materiais utilizados foram resina composta Charisma e os adesivos dentinários, Scothbond Multiuso Plus, Single Bond e Prompt L-Pop. Vinte e um dentes pré-molares humanos, recém extraídos foram selecionados e divididos em três grupos, nestes foram preparadas na face vestibular e lingual cavidades padronizadas classe V, tendo a margem gengival localização em dentina e envolvidos. Os dentes restaurados foram isolados com resina epóxica (araldite/Ciba), preservando as restaurações e 2,0mm ao seu redor. Em seguida foram submetidos à ciclagem térmica e imersos em Rodamina B a 0,2%. A extensão da penetração por método não paramétrico (teste de significância para igualdade de duas proporções), com p<0,05. Os resultados de microinfiltração marginal encontrados, para cada um dos três sistemas adesivos utilizados, não mostarram diferença estatisticamente significante


Subject(s)
Dental Leakage/etiology , Composite Resins/adverse effects , Dentin-Bonding Agents/adverse effects , Dental Materials/adverse effects
11.
Arq. odontol ; 41(02): 155-162, 2005. ilus, tab
Article in Portuguese | LILACS, BBO - Dentistry | ID: biblio-849909

ABSTRACT

Este estudo avaliou in vitro a microinfiltração marginal em dentes decíduos restaurados com um sistema adesivo monocomponente e um autocondicionante. Nas faces distais de 20 molares decíduos foram confeccionadas cavidades classe II, sendo os dentes divididos em 2 grupos: G1: Prime & Bond 2.1 + Z-250 e G2: Adhese Z-250. Após ciclagem térmica (300 ciclos), impermeabilização e imersão em solução corante de azul de metileno a 0,5 por cento, as amostras foram selecionadas e avaliadas por um examinador calibrado, com lupa de 10x de aumento. Os resultados foram avaliados através do teste não paramétrico de Kruskall-Wallis. As médias dos postos foram: G1 = 27,6 e G2 = 31,5. Conclui-se que os adesivos apresentaram comportamento semelhante, não existindo diferenças estatisticamente significantes entre os grupos


Subject(s)
Humans , Male , Female , Dentin-Bonding Agents/adverse effects , Tooth, Deciduous/abnormalities , Dental Leakage/therapy
14.
Kiru ; 1(2): 81-85, 2004.
Article in Spanish | LIPECS | ID: biblio-1109039

ABSTRACT

Los agentes adhesivos constituyen un importante y necesario requisito en la odontología restauradora. Los adhesivos dentales con acondicionamiento total basan su eficacia en la formación de la capa híbrida y en la dentina. Se han evaluado distintos agentes adhesivos que utilizan diferentes solventes como vehículo de penetración: Etanol (Single Bond, 3M), Acetona (Solo Bond M, VOCO) y agua (One Coat Bond- COLTENE), para lo cual se seleccionaron 30 terceras molares humanas recientemente extraídas, almacenadas en agua destilada a 4 °C (recomendaciones de ISO TR 11405), las cuales se dividieron en tres grupos de 10 piezas cada uno, que se asignaron de acuerdo con su solvente Acetona, Grupo C: solvente agua, realizándose cavidades clase II, que fueron restauradas posteriormente con resina compuesta, (Tetric Ceram - Vivadent). De estas preparaciones se obtuvieron láminas (mesiodistal) que fueron tratadas con HCI, NAOCL para así exponer las prolongaciones de resina y luego ser observadas mediante el MEB. Los resultados nos muestran que sí existen diferencias significativas (ANOVA p menor que 0.05), concluyendo que los adhesivos destinarios con solventes orgánicos, especialmente los basados en etanol, mejoran la capacidad de penetración.


The adhesive agents constitute an important and necessary requirement in the restoring dentistry, the dental adhesives with total- etching base their effectiveness on the formation of the hybrid layer and in the penetration in the dentin, it was evaluated different adhesive agents that use different solvents, as penetration vehicle, Ethanol (Solo Bond, 3M); and water (One Coat Bond - COLTENE); for that which recently extracted human third 30 molars were selected, stored in water distilled 4 °C (recommendations of ISO TR 11405), which were divided in three groups of 10 pieces each one that you/they were assigned according to its solvent, group A: solvent ethanol, group B: acetone; group C: water, being carried out cavities class II that were restored later on with compound resin, (Tetric Ceram - vivadent). Of these preparations sheets were obtained, that were treated with HCL, NAOCL stops this way to expose the continuations of resin and then to be observed by that if significant differences exist (ANOVA p minor that 0.05), concluding that the dentin bonding with organic solvents, especially those based on ethanol improve the penetration capacity.


Subject(s)
Humans , Dentin-Bonding Agents/adverse effects , Dental Bonding/adverse effects , Solvents
15.
Braz. dent. j ; Braz. dent. j;15(1): 19-25, 2004. ilus, tab
Article in English | LILACS | ID: lil-364063

ABSTRACT

O objetivo desse estudo foi comparar o efeito de um adesivo autocondicionante e de um ácido não lavável quanto a profundidade de penetração na dentina de dentes humanos, através da observação em Microscopia Eletrônica de Varredura (MEV). Quinze terceiros molares tiveram a dentina exposta, cortando-se a face oclusal, planificados com lixa d'água 600, cortados transversalmente e distribuídos em 6 grupos de 5 cada: grupo 1 - Prime Bond NT (NT), controle negativo; grupo 2 - ácido fosfórico 37% + Prime Bond NT (PANT), controle positivo; grupo 3 - Non-Rinse Conditioner (NRC) + Prime Bond NT (NRCNT); grupo 4 - NRC + Prime Bond 2.1 (NRCPB); grupo 5 - NRC + Scotch Bond MP (NRCSB) e grupo 6 - Prompt L-Pop (PLP). Todos foram recobertos com Dyract AP. Os fragmentos dentários foram descalcificados com HCl a 10% e NaOH a 5% e as réplicas em resina examinadas em MEV. Três examinadores calibrados avaliaram as fotomicrografias e atribuíram escores de 0 = sem penetração a 3 = penetração máxima. Os testes de Kruskal-Wallis e Mann-Whitney (P<0,05) evidenciaram três grupos homogêneos {NT, NRCPB, NRCSB e PLP}; {NRCNT} e {PANT}. Os autores concluíram que o sistema adesivo autocondicionante e o ácido não lavável apresentaram menor penetração em dentina do que o sistema adesivo convencional.


Subject(s)
Humans , Dentin-Bonding Agents/adverse effects , Dentin , Acid Etching, Dental , Dentin-Bonding Agents/analysis , Microscopy, Electron, Scanning , Resins
16.
Pesqui Odontol Bras ; 17(2): 109-12, 2003.
Article in English | MEDLINE | ID: mdl-14569350

ABSTRACT

The vascular changes in the subcutaneous connective tissue of rats induced by dentin bonding systems (one step) was studied and compared to those induced by saline solution (negative control) and Furacin (positive control), during the exudative phase of the inflammatory process. Twenty mg/kg of Evan's blue were injected intravenously in the vein of the rats' penises; 0.1 ml of each substance tested was inoculated in the subcutaneous tissue. After a 3 hour period the animals were sacrificed and their skins were excised and punched out with a standard steel 2.5 cm in diameter. The specimens were immediately immersed in 8 ml of formamide and taken to a double boiler for 72 hours at 37 C, to remove the dye. The liquid containing the overflowed dye was filtered, analyzed in the spectrophotometer (620 nm) and classified according to the criteria established by Nagem-Filho, Pereira (1976). After statistical analysis, the irritative potential of the substances was ranked as follows: Furacin (severe) > Single Bond and Bond 1 (moderate - no significant differences between the dentin bonding systems tested) > saline solution (not significant as regards the irritation degree).


Subject(s)
Dentin-Bonding Agents/adverse effects , Subcutaneous Tissue/drug effects , Animals , Anti-Infective Agents, Local/adverse effects , Anti-Infective Agents, Local/pharmacokinetics , Bisphenol A-Glycidyl Methacrylate/adverse effects , Bisphenol A-Glycidyl Methacrylate/pharmacokinetics , Capillary Permeability/drug effects , Dentin-Bonding Agents/pharmacokinetics , Inflammation/metabolism , Nitrofurazone/adverse effects , Nitrofurazone/pharmacokinetics , Rats , Subcutaneous Tissue/blood supply
17.
Rev. CROMG (Impr.) ; 9(2): 101-108, 2003. ilus
Article in Portuguese | BBO - Dentistry | ID: biblio-855785

ABSTRACT

Este trabalho teve por objetivo estudar a influência exercida pela espessura dentinária nos valores obtidos em testes de cisalhamento de amálgama aderido à estrutura dentária utilizando Scotchbond Multi-Uso Plus (grupo I) e All Bond 2 (grupo II). Após os testes mecânicos, os corpos de prova foram seccionados longitudinalmente no sentido mésio-distal. Com auxílio de uma ocular cariométrica foram realizadas duas medidas referentes à maior e à menor espessura entre a superfície e a câmara pulpar, e obtida a média dos valores estabelecidos para cada grupo. Essas médias foram comparadas com os valores de cisalhamento anteriormente obtidos. Após análise estatística, verificou-se que não houve diferenças significativas na espessura dentinária e não foi observada correlação estatisticamente significativa entre a espessura...


Subject(s)
Dentin-Bonding Agents/adverse effects , Dental Amalgam/adverse effects , Data Interpretation, Statistical , Tooth, Deciduous , Dentin/anatomy & histology , Shear Strength
18.
Pesqui. odontol. bras ; Pesqui. odontol. bras;17(2): 109-112, Apr.-Jun. 2003. tab
Article in English | LILACS | ID: lil-347419

ABSTRACT

The vascular changes in the subcutaneous connective tissue of rats induced by dentin bonding systems (one step) was studied and compared to those induced by saline solution (negative control) and Furacin (positive control), during the exudative phase of the inflammatory process. Twenty mg/kg of Evan's blue were injected intravenously in the vein of the rats' penises; 0.1 ml of each substance tested was inoculated in the subcutaneous tissue. After a 3 hour period the animals were sacrificed and their skins were excised and punched out with a standard steel 2.5 cm in diameter. The specimens were immediately immersed in 8 ml of formamide and taken to a double boiler for 72 hours at 37ºC, to remove the dye. The liquid containing the overflowed dye was filtered, analyzed in the spectrophotometer (620 nm) and classified according to the criteria established by Nagem-Filho, Pereira (1976). After statistical analysis, the irritative potential of the substances was ranked as follows: Furacin (severe) > Single Bond and Bond 1 (moderate - no significant differences between the dentin bonding systems tested) > saline solution (not significant as regards the irritation degree)


Subject(s)
Animals , Rats , Dentin-Bonding Agents/adverse effects , Subcutaneous Tissue/drug effects , Anti-Infective Agents, Local/adverse effects , Anti-Infective Agents, Local/pharmacokinetics , Bisphenol A-Glycidyl Methacrylate/adverse effects , Bisphenol A-Glycidyl Methacrylate/pharmacokinetics , Capillary Permeability/drug effects , Dentin-Bonding Agents/pharmacokinetics , Inflammation/metabolism , Nitrofurazone/adverse effects , Nitrofurazone/pharmacokinetics , Subcutaneous Tissue/blood supply
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