Os autores relatam a experiência de adoção de ações interdisciplinares no processo de ensino-aprendizagem no curso de Odontologia da Universidade Severino Sombra (USS), as quais foram realizadas com fomento do Pró-Saúde. O objetivo do trabalho é descrever as etapas da construção da proposta, a metodologia adotada, as dificuldades e resistências enfrentadas, assim como os resultados e seus desdobramentos. A partir do relato é possível concluir que as ações interdisciplinares podem ser praticadas no ensino superior desde que haja uma diretriz no projeto pedagógico, uma equipe docente comprometida com a inovação metodológica e gestores institucionais empenhados em efetuar mudanças.
A valorização dos aspectos que regem os conceitos de estética na sociedade tornou cada vez mais comum a procura por tratamentos estéticos funcionais. O clareamento dental associado às restaurações diretas são alternativas eficazes para devolver estética e função em tempo clínico curto associado ao baixo custo. Este caso clínico tem por objetivo apresentar a remodelação estética e o fechamento de diastema em região anterior de paciente adulto jovem, com a associação das técnicas de clareamento dental e remodelação/restauração com resina composta. A metodologia clínica desenvolvida neste caso foi eficaz em restabelecer a função e estética aos dentes anteriores da paciente de forma a promover um sorriso mais harmônico.Descritores: Resinas Compostas; Estética Dentária; Dentística Operatória; Clareamento Dental.
BackgroundThe purpose of this in vitro study was to evaluate the effect of conventional surface treatment with acid solutions on the surface roughness of a zirconia-based ceramic.Material and MethodsSpecimens of yttrium-tetragonal zirconia polycrystal (Y-TZP) -based ceramic were fabricated (5.0 x 5.0 x 2.0 mm, n=40). The specimens were submitted to the tested surface treatment method and divided into 4 groups (n=10): no treatment-control (GI), airborne 110 µm aluminum oxide particle abrasion for 1 minute-conventional method (GII); etching with 48% hydrofluoric acid for 2 minutes (GIII), and nitric acid/hydrofluoric acid etching for 2 minutes (GIV). The surface roughness (Ra) test was performed, followed by AFM analysis. The results were analyzed by ANOVA and the Tukey test, with the level of significance set at a=.05.ResultsThe surface treatment with acid solutions (0.16 ± 0.02-GIII; 0.11 ± 0.01-GIV) promoted a significant increase in roughness, with higher mean Ra values of Y-TZP (μm) compared to control (0.06 ± 0.01-GI) (p >.05), and lower values compared to the conventional method (0.21 ± 0.06-GII). The aluminum oxide particle treatment resulted in deep microretentions forming sharp Y-TZP peaks compared to only microretentions with acid solution treatments.ConclusionsAll Y-TZP treatments effectively promoted microretention in the ceramic. Hydrofluoric acid (48%) proved to be more effective in increasing the Ra of Y-TZP than the nitric acid/hydrofluoric acid treatment. Atomic force microscopy images revealed that both acid solutions modified the surface of the Y-TZP in a uniform manner. Key words:Zirconia, surface modification, roughness, yttria-stabilized tetragonal zirconia polycrystal.
A evolução das resinas compostas aliado a maior exigência estética dos pacientes, em restaurações diretas tanto em dentes posteriores como em dentes anteriores, podem ser alternativa clínica de melhor custo-benefício quando comparadas às restaurações indiretas em cerâmica. Este caso clínico tem por objetivo discorrer sobre uma técnica restauradora direta em resina composta associada ao uso de fibra de vidro para restauração de um primeiro molar superior vital com grande destruição coronária. A utilização de resina composta com fibra de vidro permitiu melhorar as propriedades mecânicas do material restaurador favorecendo a obtenção de um resultado estético e funcional satisfatório e funcionalmente eficaz em relação aos anseios do paciente e com ótima relação custo-benefício.Descritores: Resinas Compostas; Dentística Operatória; Dente Molar; Vidro.
The aim of the present report was to describe a case of direct composite resin restoration in tooth 46, with emphasis on the importance of polishing. A 21-year-old female patient dissatisfied with the aesthetic amalgam restoration of her tooth 46 came to the our institution for correction of the situation. The procedure performed consisted of registration of occlusal contacts, selection of resin color, removal of amalgam restoration, coronal reconstruction with composite resin, occlusal adjustment, finishing and polishing, with the use of atomic force microscopy of the resin before and after polishing. A correct clinical protocol for the posterior composite resins is fundamental for the optimization of aesthetic results, for clinical performance and for consequent restorative longevity. The atomic force microscopy images of the resin used before and after polishing emphasize the necessity and clinical importance of this operative step.Descriptors: Dental Materials; Dental Restoration, Permanent; Dental Polishing; Microscopy.ReferencesFrese C, Staehle HJ, Wolff D. The assessment of dentofacial esthetics in restorative dentistry: a review of the literature. J Am Dent Assoc. 2012;143(5):461-66.Moraschini V, Fai CK, Alto RM, dos Santos GO. Amalgam and resin composite longevity of posterior restorations: A systematic review and meta-analysis. J Dent. 2015;43(9):1043-50.Kovarik RE. Restoration of posterior teeth in clinical practice: evidence base for choosing amalgam versus composite. Dent Clin North Am. 2009;53(1):71-6.Kanzow P, Wiegand A, Schwendicke F. Cost-effectiveness of repairing versus replacing composite or amalgam restorations. J Dent. 2016;54:41-7.Lynch CD, Opdam NJ, Hickel R, Brunton PA, Gurgan S, Kakaboura A, et al. Guidance on posterior resin composites: Academy of Operative Dentistry - European Section. J Dent. 2014;42(4):377-83.Fernández E, Martín J, Vildósola P, Oliveira Junior OB, Gordan V, Mjor I et al. Can repair increase the longevity of composite resins? Results of a 10-year clinical trial. J Dent. 2015;43(2):279-86.Sabbagh J, McConnell RJ, McConnell MC. Posterior composites: Update on cavities and filling techniques. J Dent. 2017;57:86-90.Constantinescu DM, Apostol DA, Picu CR, Krawczyk K, Sieberer M. Mechanical properties of epoxy nanocomposites reinforced with functionalized silica nanoparticles. Proc Struct Integ. 2017;5:647-52.Yadav RD, Raisingani D, Jindal D, Mathur R. A comparative analysis of different finishing and polishing devices on nanofilled, microfilled, and hybrid composite: a scanning electron microscopy and profilometric study. Int J Clin Pediatr Dent. 2016;9(3):201-8.Fernandes ACBCJ, Assunção IV, Borges BCD, Costa GFA. Impact of additional polishing on the roughness and surface morphology of dental composite resins. Rev Port Estomatol Med Dent Cirur Maxilofac. 2016;57(2):74-81.Antonson SA, Yazici AR, Kilinc E, Antonson DE, Hardigan PC. Comparison of different finishing/polishing systems on surface roughness and gloss of resin composites. J Dent. 2011;39(Suppl 1):e9-17.Kumari CM, Bhat KM, Bansal R. Evaluation of surface roughness of different restorative composites after polishing using atomic force microscopy. J Conserv Dent. 2016;19(1):56-62.Pimentel PEZ, Goyatá FR, Cunha LG. Influência da técnica de polimento na lisura superficial de resinas compostas. Clin int j braz dent. 2012;8(2):226-34.Chour RG, Moda A, Arora A, Arafath MY, Shetty VK, Rishal Y. Comparative evaluation of effect of different polishing systems on surface roughness of composite resin: An in vitro study. J Int Soc Prev Community Dent. 2016;6(Suppl 2):166-70.Lins FC, Ferreira RC, Silveira RR, Pereira CN, Moreira AN, Magalhaes CS. Surface roughness, microhardness, and microleakage of a silorane-based composite resin after immediate or delayed finishing/polishing. Int J Dent. 2016;2016:8346782.
ResumoAs restaurações diretas em resina composta são amplamente utilizadas pelos cirurgiões dentistas. As várias técnicas descritas na literatura enfatizam e ratificam a natureza conservadora e minimamente invasiva. Porém, quando há grande destruição coronária, envolvendo mais de dois terços da distância intercuspídea, ou até mesmo o comprometimento de uma ou mais cúspides, a melhor alternativa é realizar o procedimento restaurador de forma indireta (com restaurações do tipo inlay ou onlay). Estas restaurações podem ser confeccionadas, em laboratório, com materiais de metal, cerâmica ou resina. Este trabalho tem por objetivo relatar três casos clínicos que utilizaram a resina composta de forma indireta e termopolimerização adicional em autoclave. Para todos os casos foram realizados preenchimento morfológico da cavidade com resina composta microhíbrida, e preparo para onlay com pontas diamantadas em alta rotação. Para os três casos clínicos os moldes dos preparos dentais foram obtidos com elastômeros. Em dois casos os modelos foram obtidos com silicone polimerizado por adição monofásico de consistência regular. O terceiro caso o modelo foi obtido com gesso pedra tipo IV. As restaurações foram elaboradoras pela técnica incremental com resina composta microhíbrida sobre os modelos e finalizadas com termopolimerização adicional em autoclave por 20 minutos. A cimentação preconizada foi adesiva realizada com cimento resinoso autoadesivo sob isolamento absoluto e após isso ajuste oclusal. A finalização seguiu-se com acabamento e polimento. As técnicas restauradoras descritas constituem-se alternativa clínica viável do ponto de vista funcional e estético, possibilitando aos profissionais da área oferecer tratamento eficaz e de baixo custo. Descritores: Resinas Compostas; Estética; Restauração Dentária Permanente; Polimerização. AbstractDirect composite resin resorations are extensively used by dental surgeons. The various techniques described in the literature emphasize and confirm the conservative and minimally invasive nature of these techniques. However, in the presence of extensive crown destruction involving more than two thirds of the intercuspal distance or even one or more cusps, the best alternative is to perform the procedure indirectly using inlay or onlay restorations. These restorations can be made in the laboratory with metal, ceramic or resin materials. The objective of the present paper is to report three clinical cases in which composite resin was used in an indirect manner with additional autoclave heath polymerization. Morphological filling of the cavity with microhybrid composite resin and preparation for onlay with high rotation diamond tips was performed in all three cases. The dental preparation models were botained with elastomers in all three cases. In two cases, the models were obtained with silicone polymerized by monophasic addition of regular consistency. In the third case, the model was obtained with type IV gypsum stone. The restorations were elaborated by the incremental technique with m...
This clinical report describes the treatment of a patient dissatisfied with the esthetics of the smile due to the presence of narrow teeth, yellow and the presence of diastema between teeth 11 and 21. Clinical examination revealed absence of the disocclusion guides. The treatment plan consisted in obtaining study casts, assembly in a semi-adjustable articulator and diagnostic waxing, to evaluate the possibilities of a restorative treatment. After the approved the viability of the procedure, dental bleaching was started in-office with 38% hydrogen peroxide associated with at-home bleaching with 15% carbamide peroxide, in order to reduce the yellowing of the teeth. Afterwards, the functional evaluation of the restorative procedure was carried out through the prior preparation of the mock-up. After functional approval of the mock-up, lip frenectomy was performed, since the frenulum is the cause of the diastema between the teeth 11 and 21. After 4 weeks was carried out the restorative procedure of teeth 13 to 23, with direct composite resin, improving the aesthetics of the smile and restoring the disocclusion guides.
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