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Evaluating the effect of different combination of impression and pouring materials on marginal and internal adaptation of zirconia crowns / Evaluación del efecto de diferentes combinaciones de materiales de impresión y vertido en la adaptación marginal e interna de las coronas de circonio
Ghodsi, Safoura; Mogharrabi, Sara; Jalali, Samane; Ahmadzadeh, Asadallah; Valizadeh, Sara.
  • Ghodsi, Safoura; Tehran University of Medical Sciences. School of Dentistry. Department of Prosthodontics. Tehran. IR
  • Mogharrabi, Sara; Ahvaz Jundishapur University of Medical sciences. School of Dentistry. Prosthodontics department. Ahvaz. IR
  • Jalali, Samane; Ahvaz Jundishapur University of Medical sciences. School of Dentistry. Prosthodontics department. Ahvaz. IR
  • Ahmadzadeh, Asadallah; Ahvaz Jundishapur University of Medical sciences. School of Dentistry. Prosthodontics department. Ahvaz. IR
  • Valizadeh, Sara; Tehran University of Medical Sciences. School of Dentistry. Department of Operative Dentistry. Tehran. IR
J. oral res. (Impresa) ; 9(5): 414-422, oct. 31, 2020. ilus, tab
Article in English | LILACS | ID: biblio-1179033
ABSTRACT

Purpose:

Two important factors in dental prosthesis are making an accurate impression and producing a suitable cast which represents the exact relationship between prepared tooth and oral structures. This study, aimed to investigate the effects of different combinations of impression and pouring materials on marginal and internal adaptation of premolar zirconia crowns. Material and

Methods:

Forty maxillary premolars were prepared considering round shoulder finish line. The impressions were made either by additional (Panasil) or condensation (Speedex) silicon, and poured by two different types of gypsum materials (Siladent or GC gypsum) (N=10). Zirconia crowns were fabricated using a CAD-CAM system. The crowns were cemented, and the samples were cut in bucco-lingual direction. Marginal and internal gaps were measured by stereomicroscope (×25).

Results:

The mean marginal gaps for Pansil-Siladent, Panasil-GC, Speedex-Siladent, and Speedex-GC were 141 µm, 143 µm, 131 µm, and 137 µm respectively. The internal gaps were 334 µm, 292 µm, 278 µm, and 257 µm respectively. The independent T-Student test showed no significant differences in average marginal or internal gap among various impression and gypsum materials or their interactions (p>0.05). Two-way ANOVA test showed no significant differences in maximum marginal or internal gap among various impression and gypsum materials and their interactions (p>0.05).

Conclusion:

The present study revealed no statistically significant difference in marginal/internal gap among crowns prepared using different combinations of impression-pouring materials evaluated.
RESUMEN

Introducción:

Dos factores importantes en la prótesis dental son hacer una impresión precisa y la producción de un modelo adecuado que represente la relación exacta entre el diente preparado y las estructuras orales. Este estudio, tuvo como objetivo investigar los efectos de diferentes combinaciones de materiales de impresión y vertido sobre la adaptación marginal e interna de coronas de zirconio premolar. Material y

Métodos:

Se prepararon cuarenta premolares maxilares considerando la línea de meta del hombro redondo. Las impresiones se realizaron con silicio adicional (Panasil) o de condensación (Speedex) y se vertieron con dos tipos diferentes de materiales de yeso (yeso Siladent o GC) (N = 10). Las coronas de zirconio se fabricaron utilizando el sistema CAD-CAM. Las coronas se cementaron y las muestras se cortaron en dirección buco-lingual. La brecha marginal e interna se midió con estereomicroscopio (×25).

Resultados:

Las brechas marginales medias para Pansil-Siladent, Panasil-GC, Speedex-Siladent y Speedex-GC fueron de 141µm, 143µm, 131µm y 137µm, respectivamente. Las brechas internas fueron 334µm, 292µm, 278µm y 257µm, respectivamente. La prueba de T-Student independiente no mostró diferencias significativas en la brecha marginal o interna promedio entre varios materiales de impresión y yeso o sus interacciones (p>0.05). La prueba ANOVA bidireccional no mostró diferencias significativas en el espacio marginal o interno máximo entre varios materiales de yeso y de impresión y sus interacciones (p>0.05).

Conclusión:

El presente estudio no reveló diferencias estadísticamente significativas en la brecha marginal/interna entre las coronas preparadas con diferentes combinaciones de materiales de impresión y vertido evaluados.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Dental Prosthesis / Crowns / Dental Impression Materials Type of study: Prognostic study Limits: Humans Language: English Journal: J. oral res. (Impresa) Journal subject: Dentistry Year: 2020 Type: Article Affiliation country: Iran Institution/Affiliation country: Ahvaz Jundishapur University of Medical sciences/IR / Tehran University of Medical Sciences/IR

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Full text: Available Index: LILACS (Americas) Main subject: Dental Prosthesis / Crowns / Dental Impression Materials Type of study: Prognostic study Limits: Humans Language: English Journal: J. oral res. (Impresa) Journal subject: Dentistry Year: 2020 Type: Article Affiliation country: Iran Institution/Affiliation country: Ahvaz Jundishapur University of Medical sciences/IR / Tehran University of Medical Sciences/IR