Influence of some factors on the fit of cemented crowns

Ishikiriama, Áquira; Oliveira, Jair de Freitas; Vieira, Dioracy Fonterrada; Mondelli, José

doi:10.1016/0022-3913(81)90100-1

Cited by 49 publications

(28 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The conventional cementing media demonstrated better marginal discrepancy than resin cement. Furthermore, we compared our results with the result of Quintas et al (12), who documented that there was no significant effect of the luting cement over the vertical marginal discrepancies of Procera ® AllCeram copings. In the same study, they presented the vertical marginal discrepancy after cementation in the reducing order, i.e., glass ionomer cement (46 μm), resin cement (45 μm) and zinc phosphate cement (41 μm).…”

Section: Discussionmentioning

confidence: 49%

Influence of Different Luting Agents on the Marginal Discrepancy of Procera® AllCeram Alumina Crown Copings – An Experimental Study

Pilathadka

Slezák

Vahaloá

et al. 2008

Acta Med. (Hradec Kralove, Czech Repub.)

View full text Add to dashboard Cite

Summary: Two maxillary first molars and two central incisor typhodont teeth were prepared with 0.8 mm chamfer, 2.0 mm occlusal reduction, and 6 degree taper. The prepared teeth were duplicated 9 times to obtain 36 die stone models and divided into three groups (n = 12). Luting agents tested were zinc phosphate, glass ionomer and resin cement. Procera ® AllCeram 0.6 mm coping was fixed with a calibrated finger force of 50 N. The absolute marginal discrepancy was measured using the scanning electron microscope on four axial walls with 4 measurements on each wall to obtain a total of 16 readings for one tooth. Mann Whitney U test was applied to find significant differences between luting cements and Kruskal Wallis tests among groups. Results The absolute marginal discrepancies of cements were in reducing order zinc phosphate (AZ) 53 μm; resin (AR) 44.5 μm, glass ionomer (AG) 29 μm. There was a significant difference among luting cements AG V/s AZ (p = 0.001) and AR V/s AG (p = 0.003), except AR V/s AZ (p = 0.213). All axial surfaces except mesial showed a significant difference. Conclusion The study concluded that different luting media have a definite effect over the final fit of AllCeram coping. Absolute marginal discrepancy was within the accepted level of 100 μm. Distal axial surface demonstrated a wider gap among all the luting agents.

show abstract

Section: Discussionmentioning

confidence: 49%

Influence of Different Luting Agents on the Marginal Discrepancy of Procera® AllCeram Alumina Crown Copings – An Experimental Study

Pilathadka

Slezák

Vahaloá

et al. 2008

Acta Med. (Hradec Kralove, Czech Repub.)

View full text Add to dashboard Cite

show abstract

“…Cada troquel recibió un alivio de 0,025mm en su superficie externa (8)(9)(10)(11)(12), también por fresado, a partir de la línea de terminación, excepto en el primer milímetro cervical, próximo a la línea de terminación.…”

Section: Materials Y Métodosunclassified

Altura de los tallados coronales en la retención de prótesis parcial fija

Nogueira

Marocho

Pavanelli

et al. 2014

Rev Estomatol Herediana.

View full text Add to dashboard Cite

IntroducciónVarios son los factores que determinan el éxito o fracaso de una prótesis fija (PPF). La retención es uno de los factores más importantes. Cuando es insuficiente, es común en volverse la primera señal detectada por el paciente, lo que sugiere que el tratamiento fracasó. En este caso, fuerzas mínimas oclusales hacen que el agente de cementación se rompa y la prótesis se disloque del diente tallado.Varios factores afectan la retención de una pieza protética y han sido agrupados en tres categorías por Kaufman et al. (1961) (1): tallado del diente, tipo de metal y material de cementación. La geometría de los tallados, en este caso, puede ser considerada como un factor que limita e influencia la cantidad de retención.La forma, conicidad del tallado y el área de dentina envuelta (altura y ancho del remanente dental), pueden hasta cierto punto ser manipulados por el criterio clínico conforme la necesidad de cada caso.La flexibilidad de la decisión del profesional es importante y deseable, porque permite muchas veces, la ejecución de procedimientos más conservadores y la preservación de las estructuras. Así, pueden ser citados los casos de prótesis unitarias, donde hay proporcionalmente menor necesidad de retención, si es comparado con las PPF extensas con varios dientes pilares (Shillingburg et al. 1998) (2). Seria temeraria una estandarización didáctica de los valores de retención necesaria, solamente considerando el tipo de tallado coronal.Parece ser más coherente que la altura final posible del tallado, sea condicionada a la altura natural del diente de soporte y que el grosor requerido para la obtención de una forma de resistencia sea adecuada al material restaurador.La literatura constata una estrecha relación entre la altura de los tallados, área de superficie de contacto diente-restauración y retención (2-6). Pero, también es común observar situaciones en la que los autores estudian una gran cantidad de variables al mismo tiempo, generando muchas veces resultados confusos.Sin embargo, parece haber concordancia que aumentar el área de contacto entre la superficie interna de la corona y la superficie dentinaria del tallado, aumenta la retención de la prótesis. Como forma de aumentarse el área de contacto, Kaufman et al. (1), en 1961, relacionaron el aumento de la altura, ancho, confección de surcos, postes y el tipo de acabado de las superficies.La altura del tallado es probable- Altura de los tallados coronales en la retención de prótesis parcial fijaNogueira JL, Salazar Marocho SM, Pavanelli AC, Zamboni Costa S, Vasconcellos LG. Altura de los tallados coronales en la retención de prótesis parcial fija. Rev Estomatol Herediana. 2008; 18(2):114-117. RESUMENLa altura y convergencia de las paredes axiales, el diámetro de los tallados, la presencia de surcos para mejorar la retención y el tipo de cemento son algunas de las condiciones que influencian el ajuste y la retención de las restauraciones fundidas. El objetivo de este trabajo fue verificar la relación de la cantidad de retención con el aumento g...

show abstract

“…[1][2] There is general agreement in the literature regarding the virtues of venting, die spacing and dynamic seating as it relates to improved crown seating, but virtually no consensus on the optimal combination to use. [3][4][5][6][7][8][9] This study investigated the effect of the routine use of die spacing with various combinations of non-static seating (tapping), static seating and dynamic seating techniques with vented and nonvented complete coverage restorations.…”

Section: Introductionmentioning

confidence: 99%

“…24 Ishikiriama and others found that the mechanical vibration of crowns at cementation promotes a better fit. 4 …”

mentioning

confidence: 99%

Effect of Venting and Seating Techniques on the Cementation of Complete Coverage Restorations

Cruz¹,

Sorenson²,

Johnson³

2008

Operative Dentistry

View full text Add to dashboard Cite

The best seating of complete crowns during cementation can be achieved by venting the crown and using a tapping cementation technique. When the crown is not vented, a dynamic seating method provides the best seating. 39 Impressions were made, stone dies fabricated, die spacer was applied and the crowns were waxed and cast in type III gold. The respective crowns were placed on the teeth and preloaded. The distance between reference marks on the tooth and crown were measured at four points around each tooth. Zinc phosphate cement was mixed and the crowns were cemented in the following groups: 1) vented, tapping the crown into place with a mallet, 2) non-vented, tapping the crown into place, 3) vented static seating with a 25 kg load, 4) non-vented dynamic seating, 5) non-vented static loading with a 25 kg load. A 25 kg load was then maintained on the crowns during the cement setting time. Distances between reference marks were then measured and the change in post-cementation distances calculated.Results. ANOVA (F=14.995, p<.0001) and multiple range tests revealed significant differences between the groups. The mean increased postcementation distances for the seating groups were (µm): 1) 132 ± 20, 2) 372 ± 26, 3) 367 ± 59, 4) 239 ± 35, 5) 537 ± 45.

show abstract

Influence of some factors on the fit of cemented crowns

Cited by 49 publications

References 4 publications

Influence of Different Luting Agents on the Marginal Discrepancy of Procera® AllCeram Alumina Crown Copings – An Experimental Study

Influence of Different Luting Agents on the Marginal Discrepancy of Procera® AllCeram Alumina Crown Copings – An Experimental Study

Altura de los tallados coronales en la retención de prótesis parcial fija

Effect of Venting and Seating Techniques on the Cementation of Complete Coverage Restorations

Contact Info

Product

Resources

About