Edge strength of indirect restorative materials

Ereifej, Nadia; Silikas, Nick; Watts, David C.

doi:10.1016/j.jdent.2009.06.009

Cited by 29 publications

(20 citation statements)

References 25 publications

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“…Fiber-reinforced composites (FRC) were reported to have greater strength than the maximum masticatory load expected in clinical situations, comparable strength to alloys used in fixed partial dentures and to ceramic materials, and higher strength than non-reinforced composites [3][4][5] . The addition of fibers was also found to enhance the edge strength of composites, resulting in less catastrophic failures 6) . Mechanical properties vary between different types of FRC materials, depending on many factors including the amount and diameter of fibers used, properties of the matrix polymer 7) , type of fibers used 8) , and fiber orientation or architecture 9) .…”

Section: Introductionmentioning

confidence: 99%

Fracture of fiber-reinforced composites analyzed <i>via</i> acoustic emission

2015

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This study investigated the fracture resistance of composite resins using a three-point bending test and acoustic emission (AE) analysis. Three groups of specimens (n=15) were prepared: non-reinforced BelleGlass HP composite (NRC), unidirectional (UFRC) and multidirectional (MFRC) fiber-reinforced groups which respectively incorporated unidirectional Stick and multidirectional StickNet fibers. Specimens were loaded to failure in a universal testing machine while an AE system was used to detect audible signals. Initial fracture strengths and AE amplitudes were significantly lower than those at final fracture in all groups (p<0.05). Initial fracture strength of UFRC (170.0 MPa) was significantly higher than MFRC (124.6 MPa) and NRC (87.9 MPa). Final fracture strength of UFRC (198.1 MPa) was also significantly higher than MFRC (151.0 MPa) and NRC (109.2 MPa). Initial and final fracture strengths were significantly correlated (r=0.971). It was concluded that fiber reinforcement improved the fracture resistance of composite resin materials and the monitoring of acoustic signals revealed significant information regarding the fracture process.

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Section: Introductionmentioning

confidence: 99%

Fracture of fiber-reinforced composites analyzed <i>via</i> acoustic emission

2015

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“…Isto reflete a capacidade do material para manter a integridade marginal durante o estresse oclusal 30 . Além desses fatores mencionados acima, o preparo para resinas indiretas é mais conservador e apresenta menor tendência para lascas marginais do que a cerâmica 10,11 .…”

Section: Discussionunclassified

“…Esta opção oferece também adequado desempenho mecânico e redução no encolhimento de polimerização em relação as restaurações de resina direta 9 . Além disso, existe a capacidade de adequada absorção de forças de carga mastigatória com menor risco de fraturas marginais comparadas às restaurações de cerâmica 10,11 , e ainda a vantagem estética comparada as restaurações de metal 12 . Outro fator importante a ser destacado é o baixo custo quando comparado a restaurações indiretas, por não necessitar de fase laboratorial extendida 4 .…”

Section: Introductionunclassified

Técnicas alternativas de restauração indireta em resina composta: relato de casos clínicos

Goyatá¹,

Siqueira²,

Novaes³

et al. 2018

Arch Health Invest

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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...

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“…These predictions are consistent with the onset of the observable crack extension shown in Tables 2 and 3. Ereifej et al 30) reported that the fracture strengths of indirect restorative materials measured with the Vickers indentation method decreased as the distance of loading from the free edge decreased and either cracking or chipping was observed at the ceramic edge. Changes in the crack length and direction in the present study agree with their report; however, marginal chipping did not occur.…”

Section: Ki/kimentioning

confidence: 99%

“…The resin composite bonded to the ceramics contributed to prevent chip formation. Ceramic inlays/ onlays are bonded to tooth using resin composite cement, so that the edge of the restoratives is supported by the resin composite cement 30) . Hayashi et al 31) observed marginal deterioration of ceramic inlays using replicas of clinically restored teeth and reported that cracks that induced marginal chipping were propagated near the edge of ceramic inlays following wear of the resin composite cement.…”

Section: Ki/kimentioning

confidence: 99%

Cracks formed by Vickers indentation adjacent to the interface in bonded dental ceramics with various marginal angles

et al. 2011

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The objective of this study was to assess the influence of the ceramic marginal angle on the length and nature of indentation cracks in ceramics near the ceramic/resin bonded interface. Disks of a leucite-reinforced ceramic or a diopside-based glass-ceramic bonded to a resin composite were sectioned so that the ceramic marginal angles were 45, 60, and 90°. Vickers indentations were placed in the ceramic at various distances from the bonded interface. The lengths of the indentation cracks running near parallel to the interface were measured and the orientation of crack propagation was characterized. The crack length and orientation were significantly affected by the distance from the interface and by the marginal angle, respectively. The crack length extended as the distance from the interface was shortened. Smaller marginal angles resulted in more oblique cracks. The toughness of the ceramic affected the indentation crack length, shape, and direction.

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Edge strength of indirect restorative materials

Cited by 29 publications

References 25 publications

Fracture of fiber-reinforced composites analyzed <i>via</i> acoustic emission

Fracture of fiber-reinforced composites analyzed <i>via</i> acoustic emission

Técnicas alternativas de restauração indireta em resina composta: relato de casos clínicos

Cracks formed by Vickers indentation adjacent to the interface in bonded dental ceramics with various marginal angles

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