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Pesquisa : D01.552.033.690.250 [Categoria DeCS]
Referências encontradas : 266 [refinar]
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[PMID]:26839288
[Au] Autor:Shih WY
[Ad] Endereço:Division of Pedodontics, Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Faculty of Dentistry, School of Dentistry, National Yang-Ming University, Taipei, Taiwan, ROC. Electronic address: wyshih@vghtpe.gov.tw.
[Ti] Título:Microleakage in different primary tooth restorations.
[So] Source:J Chin Med Assoc;79(4):228-34, 2016 Apr.
[Is] ISSN:1728-7731
[Cp] País de publicação:China (Republic : 1949- )
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Microleakage may cause tooth sensitivity, secondary caries, discoloration and even failure of the restoration. In order to overcome these potential problems, materials that are able to bind to the tooth structure have been developed, such as composite resin and glass ionomer cement. The purpose of the study was to compare microleakage arising from amalgam (Am), composite resin (CR), glass ionomer (GI), Ketac-Silver (KS), and GI filling with banding (GI+B) when these materials are used for class II restoration of a primary molar. METHODS: Fifty primary molars were collected and class II cavities were prepared on each tooth. The teeth were randomly divided into five groups (Am, CR, GI, KS, and GI+B), each of which received a different material as part of the restoration. The restored teeth then underwent 100 cycles of thermocycling that consisted of 55°C for 30 seconds, 19°C for 20 seconds, and 5°C for 30 seconds. The teeth were then immersed in 0.5% basic fuchsin solution for 24 hours. Afterwards, the teeth were embedded and sectioned mesiodistally through the center of each restoration. Dye penetration associated with the occlusal and cervical margins of each restoration was then assessed. RESULTS: Cervical leakage was greater than occlusal leakage in the CR, GI and KS groups (p < 0.05). When leakage on occlusal margin was examined, however, the Am group showed greater leakage than the CR, GI, and GI+B groups (p < 0.05). When leakage on the cervical margin was examined, the Am group showed greater leakage than the GI and GI+B groups, while the KS group showed greater leakage than the GI+B group (p < 0.05). CONCLUSION: Restorations using GI and GI+B indicated that these materials performed better than the other materials in this study overall. However, none of the materials were entirely devoid of leakage.
[Mh] Termos MeSH primário: Preparo da Cavidade Dentária/efeitos adversos
Infiltração Dentária/etiologia
Restauração Dentária Permanente/efeitos adversos
[Mh] Termos MeSH secundário: Resinas Acrílicas/química
Cimentos Cermet/química
Resinas Compostas/química
Amálgama Dentário/química
Seres Humanos
Dente Molar
Dióxido de Silício/química
Dente Decíduo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Acrylic Resins); 0 (Cermet Cements); 0 (Composite Resins); 0 (glass ionomer); 7631-86-9 (Silicon Dioxide); 8049-85-2 (Dental Amalgam)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170224
[Lr] Data última revisão:
170224
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160204
[St] Status:MEDLINE


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[PMID]:25956565
[Au] Autor:Guzman R; Fernandez-García E; Gutierrez-Gonzalez CF; Fernandez A; Lopez-Lacomba JL; Lopez-Esteban S
[Ad] Endereço:Instituto de Estudios Biofuncionales, Universidad Complutense de Madrid, Madrid, Spain.
[Ti] Título:Biocompatibility assessment of spark plasma-sintered alumina-titanium cermets.
[So] Source:J Biomater Appl;30(6):759-69, 2016 Jan.
[Is] ISSN:1530-8022
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Alumina-titanium materials (cermets) of enhanced mechanical properties have been lately developed. In this work, physical properties such as electrical conductivity and the crystalline phases in the bulk material are evaluated. As these new cermets manufactured by spark plasma sintering may have potential application for hard tissue replacements, their biocompatibility needs to be evaluated. Thus, this research aims to study the cytocompatibility of a novel alumina-titanium (25 vol. % Ti) cermet compared to its pure counterpart, the spark plasma sintered alumina. The influence of the particular surface properties (chemical composition, roughness and wettability) on the pre-osteoblastic cell response is also analyzed. The material electrical resistance revealed that this cermet may be machined to any shape by electroerosion. The investigated specimens had a slightly undulated topography, with a roughness pattern that had similar morphology in all orientations (isotropic roughness) and a sub-micrometric average roughness. Differences in skewness that implied valley-like structures in the cermet and predominance of peaks in alumina were found. The cermet presented a higher surface hydrophilicity than alumina. Any cytotoxicity risk associated with the new materials or with the innovative manufacturing methodology was rejected. Proliferation and early-differentiation stages of osteoblasts were statistically improved on the composite. Thus, our results suggest that this new multifunctional cermet could improve current alumina-based biomedical devices for applications such as hip joint replacements.
[Mh] Termos MeSH primário: Óxido de Alumínio/química
Substitutos Ósseos/síntese química
Cimentos Cermet/síntese química
Osteoblastos/fisiologia
Gases em Plasma/química
Titânio/química
[Mh] Termos MeSH secundário: Animais
Apoptose/fisiologia
Materiais Biocompatíveis/síntese química
Linhagem Celular
Proliferação Celular/fisiologia
Sobrevivência Celular/fisiologia
Dureza
Teste de Materiais
Camundongos
Osteoblastos/citologia
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biocompatible Materials); 0 (Bone Substitutes); 0 (Cermet Cements); 0 (Plasma Gases); 15FIX9V2JP (titanium dioxide); D1JT611TNE (Titanium); LMI26O6933 (Aluminum Oxide)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150510
[St] Status:MEDLINE
[do] DOI:10.1177/0885328215584858


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[PMID]:25646167
[Au] Autor:Roberts HW; Berzins DW
[Ti] Título:Early reaction kinetics of contemporary glass-ionomer restorative materials.
[So] Source:J Adhes Dent;17(1):67-75, 2015 Feb.
[Is] ISSN:1461-5185
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:PURPOSE: To investigate polyalkenoate reaction rates in conventional glass-ionomer cement (GIC) and resin-modified glass ionomer (RMGI) restorative materials using infrared spectroscopy. MATERIALS AND METHODS: Nine conventional GIC and six RMGI restorative materials were prepared according to manufacturer's directions and placed on a FTIR (Fourier transform infrared spectroscopy) diamond ATR (attenuated total reflectance) surface. FTIR spectra (700 to 1800 cm-1) were obtained each minute for 3 h. VLC specimens were light polymerized after 1 min; at 5 min, all samples were covered with gauze saturated with deionized water. Polyalkenoate reaction was determined by measuring area growth (Å/cm-1) between 1375 and 1500 cm-1. Mean peak areas were determined at 5, 15, 30, 90, and 180 min and compared using ANOVA (p = 0.05) RESULTS: For all RMGI materials, VLC polymerization inhibited the polyalkenoate reaction rate. Compared to conventional GIC, RMGI materials demonstrated less polyalkenoate reaction. Compared to dark curing, RMGI light polymerization significantly inhibited the polyalkenoate reaction rate. CONCLUSIONS: The addition of resin components to glass-ionomer products significantly retards and impedes the polyalkenoate reaction. The polyalkenoate reaction rate of RMGI products was significantly lower than that of self-curing GIC restorative materials. Furthermore, light activation of RMGI products further retards the polyalkenoate rate. When clinicians require the therapeutic benefit of a polyalkenoate product, perhaps a conventional GIC restorative product should be the first material of choice.
[Mh] Termos MeSH primário: Cimentos de Ionômeros de Vidro/química
[Mh] Termos MeSH secundário: Silicatos de Alumínio/química
Cimentos Cermet/química
Fenômenos Químicos
Resinas Compostas/química
Escuridão
Seres Humanos
Cinética
Cura Luminosa de Adesivos Dentários
Maleatos/química
Polimerização
Cimentos de Resina/química
Resinas Sintéticas/química
Espectroscopia de Infravermelho com Transformada de Fourier
Fatores de Tempo
Água/química
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Aluminum Silicates); 0 (Cermet Cements); 0 (Composite Resins); 0 (Fuji II LC cement); 0 (Fuji IX GP Fast); 0 (Glass Ionomer Cements); 0 (Ketac-Molar Quick); 0 (Maleates); 0 (Photac-Fil Quick); 0 (Resin Cements); 0 (Resins, Synthetic); 0 (Vitremer); 0 (ketac-molar); 059QF0KO0R (Water); 86438-26-8 (Chemfil); 89493-19-6 (Ketac-Fil)
[Em] Mês de entrada:1506
[Cu] Atualização por classe:161125
[Lr] Data última revisão:
161125
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:150204
[St] Status:MEDLINE
[do] DOI:10.3290/j.jad.a33526


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[PMID]:25145987
[Au] Autor:Fernandez-Garcia E; Guillem-Marti J; Gutierrez-Gonzalez CF; Fernandez A; Ginebra MP; Lopez-Esteban S
[Ad] Endereço:Nanomaterials and Nanotechnology Research Center (CINN), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Oviedo (UO), El Entrego, Spain e.fernandez@cinn.es.
[Ti] Título:Osteoblastic cell response to spark plasma-sintered zirconia/titanium cermets.
[So] Source:J Biomater Appl;29(6):813-23, 2015 Jan.
[Is] ISSN:1530-8022
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Ceramic/metal composites, cermets, arise from the idea to combine the dissimilar properties in the pure materials. This work aims to study the biocompatibility of new micro-nanostructured 3 Y-TZP/Ti materials with 25, 50 and 75 vol.% Ti, which have been successfully obtained by spark slasma sintering technology, as well as to correlate their surface properties (roughness, wettability and chemical composition) with the osteoblastic cell response. All samples had isotropic and slightly waved microstructure, with sub-micrometric average roughness. Composites with 75 vol.% Ti had the highest surface hydrophilicity. Surface chemical composition of the cermets correlated well with the relative amounts used for their fabrication. A cell viability rate over 80% dismissed any cytotoxicity risk due to manufacturing. Cell adhesion and early differentiation were significantly enhanced on materials containing the nanostructured 3 Y-TZP phase. Proliferation and differentiation of SaOS-2 were significantly improved in their late-stage on the composite with 75 vol.% Ti that, from the osseointegration standpoint, is presented as an excellent biomaterial for bone replacement. Thus, spark plasma sintering is consolidated as a suitable technology for manufacturing nanostructured biomaterials with enhanced bioactivity.
[Mh] Termos MeSH primário: Cimentos Cermet/síntese química
Osteoblastos/citologia
Osteoblastos/fisiologia
Osteogênese/fisiologia
Titânio/química
Zircônio/química
[Mh] Termos MeSH secundário: Substitutos Ósseos/síntese química
Diferenciação Celular/fisiologia
Linhagem Celular
Proliferação Celular/fisiologia
Sobrevivência Celular/fisiologia
Dureza
Temperatura Alta
Seres Humanos
Teste de Materiais
Gases em Plasma/química
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Bone Substitutes); 0 (Cermet Cements); 0 (Plasma Gases); 15FIX9V2JP (titanium dioxide); C6V6S92N3C (Zirconium); D1JT611TNE (Titanium); S38N85C5G0 (zirconium oxide)
[Em] Mês de entrada:1602
[Cu] Atualização por classe:141223
[Lr] Data última revisão:
141223
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140823
[St] Status:MEDLINE
[do] DOI:10.1177/0885328214547400


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[PMID]:25491809
[Au] Autor:Gardon M; Concustell A; Dosta S; Cinca N; Cano IG; Guilemany JM
[Ad] Endereço:Thermal Spray Centre, CPT, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain. Electronic address: mgardon@cptub.eu.
[Ti] Título:Improved bonding strength of bioactive cermet Cold Gas Spray coatings.
[So] Source:Mater Sci Eng C Mater Biol Appl;45:117-21, 2014 Dec.
[Is] ISSN:1873-0191
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The fabrication of cermet biocompatible coatings by means Cold Gas Spray (CGS) provides prosthesis with outstanding mechanical properties and the required composition for enhancing the bioactivity of prosthetic materials. In this study, hydroxyapatite/Titanium coatings were deposited by means of CGS technology onto titanium alloy substrates with the aim of building-up well-bonded homogeneous coatings. Powders were blended in different percentages and sprayed; as long as the amount of hydroxyapatite in the feedstock increased, the quality of the coating was reduced. Besides, the relation between the particle size distribution of ceramic and metallic particles is of significant consideration. Plastic deformation of titanium particles at the impact eased the anchoring of hard hydroxyapatite particles present at the top surface of the coating, which assures the looked-for interaction with the cells. Coatings were immersed in Hank's solution for 1, 4 and 7 days; bonding strength value was above 60 MPa even after 7 days, which enhances common results of HAp coatings obtained by conventional thermal spray technologies.
[Mh] Termos MeSH primário: Cimentos Cermet/química
Materiais Revestidos Biocompatíveis/química
[Mh] Termos MeSH secundário: Ligas/química
Cerâmica
Durapatita/química
Dureza
Microscopia Eletrônica de Varredura
Tamanho da Partícula
Resistência à Tração
Titânio/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Alloys); 0 (Cermet Cements); 0 (Coated Materials, Biocompatible); 91D9GV0Z28 (Durapatite); D1JT611TNE (Titanium)
[Em] Mês de entrada:1508
[Cu] Atualização por classe:151119
[Lr] Data última revisão:
151119
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141211
[St] Status:MEDLINE


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[PMID]:24171977
[Au] Autor:Tegginmani VS; Goel B; Uppin V; Horatti P; Kumar LS; Nainani A
[Ad] Endereço:Professor and Head, Department of Conservative and Endodontics ACPM Dental College, Dhule-424001, Maharashtra, India, Phone: +918888816650, e-mail: dr.viresh@gmail.com.
[Ti] Título:Comparison of antibacterial activity of glass-ionomer cement and amalgam in class two restorations by Streptococcus mutans count analysis at fixed intervals: an in vivo study.
[So] Source:J Contemp Dent Pract;14(3):381-6, 2013 May 01.
[Is] ISSN:1526-3711
[Cp] País de publicação:India
[La] Idioma:eng
[Ab] Resumo:AIM: The purpose of the present study was to determine the influence of glass ionomer cement and amalgam restoration on the level of Streptococcus mutans in the interproximal plaque at periodic intervals and also to compare these values. MATERIALS AND METHODS: Seventeen adult patients having two proximal carious lesions on any quadrant of the jaw (either opposing or contralateral) were selected for this study. Carious lesions were diagnosed clinically and from bitewing radiographs. Of the two carious lesions, one was restored with glass ionomer cermet cement and another with amalgam. Plaque samples were collected from interproximal areas before and at 1 month and 3 months post-treatment in a test tube containing 5 ml of modified Stuart's liquid transport fluid. Identification of organisms in the colony was done after Gram staining. RESULTS: Comparison of values before restoration and after restoration at 1 month interval showed a statistically significant decrease (p<0.001). Similarly, comparison of values before and after restorations at 3 months also showed statistically significant decrease (p<0.02). But comparison of restorations of 1 and 3 months intervals showed no statistical significant difference (p>0.05). CONCLUSION: Glass ionomer restorations have definite advantage over the amalgam, as the tunnel preparation is more conservative and fluoride release from the glass ionomer inhibits the growth of S. mutans in the plaque. CLINICAL SIGNIFICANCE: Glass ionomer cement should be preferred over amalgam in conservatively prepared restorations as it reduces the microbial activities due to fluoride release.
[Mh] Termos MeSH primário: Antibacterianos/farmacologia
Amálgama Dentário/farmacologia
Restauração Dentária Permanente
Cimentos de Ionômeros de Vidro/farmacologia
Streptococcus mutans/efeitos dos fármacos
[Mh] Termos MeSH secundário: Ataque Ácido Dentário/métodos
Resinas Acrílicas/química
Adulto
Carga Bacteriana/efeitos dos fármacos
Cariostáticos/química
Cimentos Cermet/química
Resinas Compostas/química
Cárie Dentária/terapia
Preparo da Cavidade Dentária/classificação
Preparo da Cavidade Dentária/instrumentação
Preparo da Cavidade Dentária/métodos
Materiais Dentários/química
Placa Dentária/microbiologia
Restauração Dentária Permanente/classificação
Fluoretos/química
Seguimentos
Cimentos de Ionômeros de Vidro/química
Seres Humanos
Bandas de Matriz
Poliuretanos/química
Radiografia Interproximal
Compostos de Prata/química
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Acrylic Resins); 0 (Anti-Bacterial Agents); 0 (Cariostatic Agents); 0 (Cermet Cements); 0 (Composite Resins); 0 (Dental Materials); 0 (Glass Ionomer Cements); 0 (Heliomolar); 0 (Polyurethanes); 0 (Silver Compounds); 117630-05-4 (Chelon Silver); 8049-85-2 (Dental Amalgam); Q80VPU408O (Fluorides)
[Em] Mês de entrada:1410
[Cu] Atualização por classe:131031
[Lr] Data última revisão:
131031
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:131101
[St] Status:MEDLINE


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[PMID]:23988173
[Au] Autor:Selimovic-Dragas M; Hasic-Brankovic L; Korac F; Dapo N; Huseinbegovic A; Kobaslija S; Lekic M; Hatibovic-Kofman S
[Ad] Endereço:Department of Preventive and Pediatric Dentistry, Faculty of Dentistry, University of Sarajevo, Bolnicka 4a, 71 000 Sarajevo, Bosnia and Herzegovina. mselimovic96@gmail.com
[Ti] Título:In vitro fluoride release from a different kind of conventional and resin modified glass-ionomer cements.
[So] Source:Bosn J Basic Med Sci;13(3):197-202, 2013 Aug.
[Is] ISSN:1840-4812
[Cp] País de publicação:Bosnia and Herzegovina
[La] Idioma:eng
[Ab] Resumo:Fluoride release is important characteristic of glass-ionomer cements. Quantity of fluoride ions released from the glass-ionomer cements has major importance in definition of their biological activity. The objectives of this study were to define the quantity of fluoride ions released from the experimental glass-ionomer cements and to define the effect of fluoride ions released from the experimental glass-ionomer cements on their cytotoxicity. Concentrations of the fluoride ions released in the evaluated glass-ionomer cements were measured indirectly, by the fluoride-selective WTW, F500 electrode potential, combined with reference R503/D electrode. Statistical analyses of F-ion concentrations released by all glass-ionomers evaluated at two time points, after 8 and after 24 hours, show statistically higher fluoride releases from RMGICs: Vitrebond, Fuji II LC and Fuji Plus, when compared to conventional glass-ionomer cements: Fuji Triage, Fuji IX GP Fast and Ketac Silver, both after 8 and after 24 hours. Correlation coefficient between concentrations of fluoride ion released by evaluated glass-ionomer cements and cytotoxic response of UMR-106 osteoblast cell-line are relatively high, but do not reach levels of biological significance. Correlation between concentrations of fluoride ion released and cytotoxic response of NIH3T3 mouse fibroblast cell line after 8 hours is high, positive and statistically significant for conventional GICs, Fuji Triage and Fuji IX GP Fast, and RMGIC, Fuji II LC. Statistically significant Correlation coefficient between concentrations of fluoride ion released and cytotoxic response of NIH3T3 cell line after 24 hours is defined for RMGIC Fuji II LC only.
[Mh] Termos MeSH primário: Cimentos Dentários/química
Fluoretos/química
Cimentos de Ionômeros de Vidro/química
[Mh] Termos MeSH secundário: Animais
Linhagem Celular
Cimentos Cermet/química
Meios de Cultura
Íons
Teste de Materiais
Camundongos
Células NIH 3T3
Ratos
Resinas Sintéticas/química
Fatores de Tempo
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cermet Cements); 0 (Culture Media); 0 (Dental Cements); 0 (Fuji II LC cement); 0 (Fuji IX GP Fast); 0 (Glass Ionomer Cements); 0 (Ions); 0 (Resins, Synthetic); 0 (fuji TRIAGE pink capsule); 126338-82-7 (Vitrabond); Q80VPU408O (Fluorides)
[Em] Mês de entrada:1403
[Cu] Atualização por classe:170921
[Lr] Data última revisão:
170921
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:130831
[St] Status:MEDLINE


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[PMID]:21903509
[Au] Autor:Hengtrakool C; Kukiattrakoon B; Kedjarune-Leggat U
[Ad] Endereço:Department of Conserative Dentistry, FAculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
[Ti] Título:Gradual surface degradation of restorative materials by acidic agents.
[So] Source:Gen Dent;59(2):e50-62, 2011 Mar-Apr.
[Is] ISSN:0363-6771
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The aim of this study was to investigate the effect of acidic agents on surface roughness and characteristics of four restorative materials. Fifty-two discs were created from each restorative material: metal-reinforced glass ionomer cement (Ketac-S), resin-modified glass ionomer cement (Fuji II LC), resin composite (Filtek Z250), and amalgam (Valiant-PhD); each disc was 12 mm in diameter and 2.5 mm thick. The specimens were divided into four subgroups (n=13) and immersed for 168 hours in four storage media: deionized water (control); citrate buffer solution; green mango juice; and pineapple juice. Surface roughness measurements were performed with a profilometer, both before and after storage media immersion. Surface characteristics were examined using scanning electron microscopy (SEM). Statistical significance among each group was analyzed using two-way repeated ANOVA and Tukey's tests. Ketac-S demonstrated the highest roughness changes after immersion in acidic agents (p<0.05), followed by Fuji II LC. Valiant-PhD and Filtek Z250 illustrated some minor changes over 168 hours. The mango juice produced the greatest degradation effect of all materials tested (p<0.05). SEM photographs demonstrated gradual surface changes of all materials tested after immersions. Of the materials evaluated, amalgam and resin composite may be the most suitable for restorations for patients with tooth surface loss.
[Mh] Termos MeSH primário: Materiais Dentários/química
Cimentos de Ionômeros de Vidro/química
[Mh] Termos MeSH secundário: Ácidos/química
Ananas
Bebidas
Tampões (Química)
Cimentos Cermet/química
Citratos/química
Resinas Compostas/química
Ligas Dentárias/química
Amálgama Dentário/química
Restauração Dentária Permanente
Seres Humanos
Imersão
Mangifera
Teste de Materiais
Microscopia Eletrônica de Varredura
Cimentos de Resina/química
Resinas Sintéticas/química
Propriedades de Superfície
Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Acids); 0 (Buffers); 0 (Cermet Cements); 0 (Citrates); 0 (Composite Resins); 0 (Dental Alloys); 0 (Dental Materials); 0 (Filtek Z250); 0 (Fuji II LC cement); 0 (Glass Ionomer Cements); 0 (Resin Cements); 0 (Resins, Synthetic); 059QF0KO0R (Water); 8049-85-2 (Dental Amalgam); 97198-18-0 (Valiant PhD)
[Em] Mês de entrada:1201
[Cu] Atualização por classe:131121
[Lr] Data última revisão:
131121
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:110910
[St] Status:MEDLINE


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[PMID]:21434732
[Au] Autor:Yilmaz Y; Kara NB; Yilmaz A; Sahin H
[Ad] Endereço:Faculty of Dentistry, Atatürk University, Erzurum, Turkey. yyilmaz25@gmail.com
[Ti] Título:Wear and repair of stainless steel crowns.
[So] Source:Eur J Paediatr Dent;12(1):25-30, 2011 Mar.
[Is] ISSN:1591-996X
[Cp] País de publicação:Italy
[La] Idioma:eng
[Ab] Resumo:AIM: The purpose of this study was to determine the wear of stainless steel crowns (SSCs) in children, and compare the extent of microleakage in SSCs that had been repaired using either a cermet glass-ionomer cement (GIC) or a packable composite resin (CR). MATERIALS AND METHODS: For the first aim, the occlusal surface thickness of 31 harvested SSCs (21 primary first and 10 second molars) and 18 unused SSCs was measured, and then examined under scanning electron microscopy. For the second aim, standardised holes were prepared on the occlusal surfaces of 20 SSCs, and then repaired using either a cermet GIC or packable CR. After their repair, the extent of microleakage was determined using 0.5% basic fuchsin and stereomicroscopy. RESULTS: The thickness of all the harvested SCCs was 5.3 µm less than that of the unused SCCs (p<0.02), and there were no significant differences between the thickness and occlusal wear rates of harvested SSCs from the first and second primary molars. Although neither of the two repair materials completely prevented microleakage, the number of specimens in which microleakage occurred after repair with a cermet GIC was significantly lower than the number of specimens in which a packable CR was used (p<0.05). CONCLUSION: We concluded that the occlusal surfaces of SSCs for first and second primary molars display wear. Although perforated SSCs can be repaired using either a cermet GIC or a packable CR, less microleakage occurs in SSCs that were repaired with a cermet GIC than those with a packable CR.
[Mh] Termos MeSH primário: Coroas
Assistência Odontológica para Crianças/instrumentação
Reparação em Prótese Dentária/métodos
Desgaste de Restauração Dentária
[Mh] Termos MeSH secundário: Cimentos Cermet/uso terapêutico
Criança
Pré-Escolar
Resinas Compostas/uso terapêutico
Colagem Dentária
Infiltração Dentária/prevenção & controle
Análise do Estresse Dentário
Seres Humanos
Dente Molar
Aço Inoxidável
Análise de Sobrevida
Dente Decíduo
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cermet Cements); 0 (Composite Resins); 12597-68-1 (Stainless Steel)
[Em] Mês de entrada:1104
[Cu] Atualização por classe:110325
[Lr] Data última revisão:
110325
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:110326
[St] Status:MEDLINE


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[PMID]:20555217
[Au] Autor:Helmi K; Menard-Szczebara F; Lénès D; Jacob P; Jossent J; Barbot C; Delabre K; Arnal C
[Ad] Endereço:Centre d'Analyses Environnementales (CAE), Veolia Environnement, Immeuble le Dufy, 1 Place de Turenne, 94417 St Maurice Cedex, France. karim.helmi@veolia.com
[Ti] Título:Adenovirus, MS2 and PhiX174 interactions with drinking water biofilms developed on PVC, cement and cast iron.
[So] Source:Water Sci Technol;61(12):3198-207, 2010.
[Is] ISSN:0273-1223
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Biofilms colonizing pipe surfaces of drinking water distribution systems could provide habitat and shelter for pathogenic viruses present in the water phase. This study aims (i) to develop a method to detect viral particles present in a drinking water biofilm and (ii) to study viral interactions with drinking water biofilms. A pilot scale system was used to develop drinking water biofilms on 3 materials (7 cm(2) discs): PVC, cast iron and cement. Biofilms were inoculated with viral model including MS2, PhiX174 or adenovirus. Five techniques were tested to recover virus from biofilms. The most efficient uses beef extract and glycine at pH = 9. After sonication and centrifugation, the pH of the supernatant is neutralized prior to viral analysis. The calculated recovery rates varied from 29.3 to 74.6% depending on the virus (MS2 or PhiX174) and the material. Applying this protocol, the interactions of virus models (MS2 and adenovirus) with drinking water biofilms were compared. Our results show that adsorption of viruses to biofilms depends on their isoelectric points, the disc material and the hydrodynamic conditions. Applying hydrodynamic conditions similar to those existing in drinking water networks resulted in a viral adsorption corresponding to less than 1% of the initial viral load.
[Mh] Termos MeSH primário: Adenoviridae/isolamento & purificação
Bacteriófago phi X 174/isolamento & purificação
Biofilmes
Levivirus/isolamento & purificação
[Mh] Termos MeSH secundário: Adsorção
Cimentos Cermet
Contaminação de Equipamentos
Seres Humanos
Concentração de Íons de Hidrogênio
Ferro
Testes de Neutralização
Projetos Piloto
Abastecimento de Água/normas
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cermet Cements); E1UOL152H7 (Iron)
[Em] Mês de entrada:1009
[Cu] Atualização por classe:131121
[Lr] Data última revisão:
131121
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:100618
[St] Status:MEDLINE
[do] DOI:10.2166/wst.2010.821



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