Aim. Marginal adaptation is one ofthe most important factors in dental reconstructions. The aim ofthe present work was to evaluate with in vivo andin vitro studies the marginal precision and the microstructure of the gold cast inlays. Methods. For the in vivo analysis 10 patients were selected, while for the in vitro study 10 extracted teeth were used. The impressions were made by Polyvinilsiloxane while the master cast was made by gypsum type IV. The inlays were cast in gold JRVT Jensen) using an experimental procedure. After cementing, the margins of each inlay was burnished. To evaluate the marginal discrepancy of in vivo inlays, the replica technique was used, while for the in vitro analysis the serial slice cut technique was performed. All samples were processed for metallograp hic analysis using SEM. Results. The measu red in vivo inlay marginal gap was 9,06±3,37 microns (mean±SD), while for in vitro inlay the marginal gap was of 10,47±2,09 microns (mean±SD). Metallographic analysis showed equiaxial grain of smal dimension. Conclusion. The results suggest that using the proposed casting technique it is possible to increase marginal adaptation and microstructural properties.

Adattamento marginale dopo cementazione di intarsi in oro fusi con una metodica sperimentale

TRAINI, TONINO;DI IORIO, DONATO
;
MURMURA, Giovanna;CAPUTI, Sergio
2004

Abstract

Aim. Marginal adaptation is one ofthe most important factors in dental reconstructions. The aim ofthe present work was to evaluate with in vivo andin vitro studies the marginal precision and the microstructure of the gold cast inlays. Methods. For the in vivo analysis 10 patients were selected, while for the in vitro study 10 extracted teeth were used. The impressions were made by Polyvinilsiloxane while the master cast was made by gypsum type IV. The inlays were cast in gold JRVT Jensen) using an experimental procedure. After cementing, the margins of each inlay was burnished. To evaluate the marginal discrepancy of in vivo inlays, the replica technique was used, while for the in vitro analysis the serial slice cut technique was performed. All samples were processed for metallograp hic analysis using SEM. Results. The measu red in vivo inlay marginal gap was 9,06±3,37 microns (mean±SD), while for in vitro inlay the marginal gap was of 10,47±2,09 microns (mean±SD). Metallographic analysis showed equiaxial grain of smal dimension. Conclusion. The results suggest that using the proposed casting technique it is possible to increase marginal adaptation and microstructural properties.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11564/137916
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