Wear of human enamel against a commercial castable ceramic restorative material

Palmer, D.S.; Barco, Martin T.; Pelleu, George B.; McKinney, John E.

doi:10.1016/0022-3913(91)90161-o

Cited by 40 publications

(19 citation statements)

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“…The amount of dental porcelain, castable ceramic and enamel wear obtained from previous in vitro studies varied from 0.03 to 0.6 mm 3 after 150,000-300,000 loading cycles [30][31][32]. In these studies, the authors assumed that 250,000 cycles simulated one year of clinical wear under normal intraoral conditions [31][32].…”

Section: Discussionmentioning

confidence: 99%

Clinical performance and wear characteristics of veneered lithia-disilicate-based ceramic crowns

et al. 2008

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Objectives-The objectives of this study were to characterize the clinical performance and wear characteristics of lithia-disilicate-based ceramic crowns.Methods-Thirty posterior crowns were made using the heat-pressing technique and lithiadisilicate-based core ceramic. Subjects were recalled annually. The quality of crowns and adjacent gingival tissues were examined using nine criteria for acceptability. All crowns were examined and ranked from 4 (Excellent) to 1 (Unacceptable) for each criterion. Impressions were made for replica models at each appointment. Wear characteristics of dental ceramic and enamel were obtained by comparing the surface of the original model with the follow-up model using a laser scanner.Results-Twenty nine subjects returned for the one-year recall examination. The maximum clenching force for the 30 subjects ranged from 125 to 815 N. All clinical criteria were ranked good to excellent at the one-year recall exam and no fractures were observed. The mean occlusal wear volumes for the ceramic crowns after one year were 0.19 (0.065) mm 3 for premolar sites and 0.34 (0.08) mm 3 for molar sites. The mean occlusal wear volumes of opposing enamel after one year were 0.21 (0.06) mm 3 for premolar teeth and 0.50 (0.22) mm 3 for molar teeth. The mean occlusal wear volume of ceramic molar crowns was significantly lower than the volume of enamel wear of the opposing teeth (p≤0.05).Conclusions-The quality of the overall prostheses and the gingival tissues were acceptable after one year. The mean occlusal wear volume of ceramic molar crowns was significantly lower than the enamel wear volume of the opposing teeth.

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Section: Discussionmentioning

confidence: 99%

Clinical performance and wear characteristics of veneered lithia-disilicate-based ceramic crowns

et al. 2008

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“…4 This result could be due to differences in the inner composition and the nature of the external surface of this ceramic. This indicates that shading surfaces should be avoided when enamel opposes the restoration, 19,22 and the use of IPS Empress on functional contacting surfaces should be avoided.…”

Section: Discussionmentioning

confidence: 99%

Esthetic Restorative Materials and Opposing Enamel Wear

Olivera¹,

Marques²

2008

Operative Dentistry

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The data obtained in this study can help practitioners with selection of the appropriate restorative materials to minimize further tooth and restoration wear, which is an important consideration during treatment planning. SUMMARYThis in vitro study compared the effects of a gold alloy (Degulor M), four dental ceramics (IPS Empress, IPS Empress 2, Duceram Plus, Duceram LFC) and a laboratory-processed composite (Targis) on the wear of human enamel. The amount of wear of the enamel (dental cusps) and restorative materials (disks) were tested in water at 37°C under standard load (20 N), with a chewing rate of 1.3 Hz and was determined after 150,000 and 300,000 cycles. Before the test, the average surface roughness of the restorative materials was analyzed using the Ra parameter. The results of this study indicate that Targis caused enamel wear similar to Degulor M and resulted in significantly less wear than all the ceramics tested. IPS Empress provoked the greatest amount of enamel wear and Degulor M caused less vertical dimension loss. Targis could be an appropriate alternative material to ceramic, because it is esthetic and produces opposing enamel wear comparable to gold alloy.

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“…Kausner, en 1982, intentó definir y comparar cualitativamente el autoglaseado y el pulido de las superficies de la porcelana. Probó cuatro secuencias de pulido no encontrando diferencias significativas entre ellas; no obstante las diferencias significativas se encontraron entre las abrasiones comparadas previamente a la secuencia de pulido: las superficies pulidas con el kit de pulido Shofu son los que crean una superficie menos rugosa 22,23 . Asi mismo, Golstein estudió varios métodos de pulido, obteniendo el kit de Shofu como clínicamente acceptable, además de verificar experimentalmente que las variables de la velocidad y presencia o no de agua no implican mejor eficacia de pulido 23 .…”

Section: Discussionunclassified

“…Palmer, en 1991, demostró como las restauraciones cerámicas maquilladas abrasionan el esmalte natural con más facilidad que la porcelana sin maquillaje, recomendando una cerámica vitrificada sin maquillaje 23 . De Long describe que el desgaste es tres veces más en las restauraciones maquilladas que los no maquillados ya que aumenta la porosidad de la superficie 24 .…”

Section: Discussionunclassified

Cambios cromáticos en la superficie cerámica

Torné-Duran

Escuin-Henar

Monreal-Nieto

2003

RCOE

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Resumen: El tallado insuficiente de un diente que va a recibir un retenedor en metal-porcelana supone confeccionar una restauración con adecuada morfología pero escaso grosor de porcelana o bien una restauración sobrecontorneada y grosor adecuado de porcelana. En este último caso, la consecución de una correcta oclusión puede obligar a un desgaste clínico intraoral de la porcelana lo que ocasiona una superficie altamente abrasiva que posteriormente requerirá un retoque por pulido mecáni-co o glaseado final. De Cualquier manera este retoque y pulido modifica la superficie de la porcelana y puede influenciar en el efecto cromático final de la restauración. Con esta base diseñamos una investigación para valorar los cambios de color ocasionados por el pulido de la porcelana. Las muestras fueron 95 especímenes de metal-porcelana combinando 2 colores, 6 aleaciones y 3 cerámicas diferentes. Todos se sometieron a un análisis colorimétrico. Los resultados muestran que existen diferencias de color entre aleaciones, cerámicas y tonos antes y después de un pulido de una superficie cerámica glaseada; siendo la aleación Cosmor la que más variación de color tiene y la aleación Wirón la que menos variación tiene. La cerámica que más ve influido su color por el pulido es la Vita VMK.Palabras Clave: Cerámica, Color, Metal,Pulido.Abstract: An insufficient tooth reduction for a subsequent PFM-retainer leads to the fabrication of either a restoration with an adequate morphology, but insufficient porcelain thickness or to an overcontoured restoration with an adequate porcelain thickness. In the last case, in order to achieve a proper occlusion it will be necessary to carry out an intraoral adjustment of the porcelain, producing a highly abrasive surface, which will need to be finished by mechanical polishing or final glazing. In both cases, these final adjustments and polishing steps will modify the porcelain surface and can have an impact on the final chromatic effect of the restoration. Based on this, we have designed a study to evaluate the colour changes associated to the polishing of the porcelain. It was carried out on 95 PFMsamples, combining two shades, six alloys and three ceramics. All were subjected to colorimetric analysis. The results show that there are differences in shade between the different alloys, ceramics and hues before and after the polishing of a glazed ceramic surface. The «Cosmor» -alloy shows the largest colour variation, while the «Wiron»-alloy exhibits the smallest variation. The ceramic whose shade is more influenced by the polishing is «Vita VMK».

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Wear of human enamel against a commercial castable ceramic restorative material

Cited by 40 publications

References 4 publications

Clinical performance and wear characteristics of veneered lithia-disilicate-based ceramic crowns

Clinical performance and wear characteristics of veneered lithia-disilicate-based ceramic crowns

Esthetic Restorative Materials and Opposing Enamel Wear

Cambios cromáticos en la superficie cerámica

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