Effect of phosphate-bonded investments on titanium reaction layer and crown fit
Braz. oral res
; 24(2): 147-152, Apr.-June 2010. tab
Article
de En
| LILACS
| ID: lil-553900
Bibliothèque responsable:
BR1.1
ABSTRACT
This study analyzed the reaction layer and measured the marginal crown fit of cast titanium applied to different phosphate-bonded investments, prepared under the following conditions (liquid concentration/casting temperature) Rema Exakt (RE) - 100 percent/237°C, 75 percent/287°C, Castorit Super C (CS)-100 percent/70°C, 75 percent/141°C and Rematitan Plus (RP)- 100 percent/430°C (special to titanium cast, as the control group). The reaction layer was studied using the Vickers hardness test, and analyzed by two way ANOVA and Tukey's HSD tests (á = 0.05). Digital photographs were taken of the crowns seated on the die, the misfit was measured using an image analysis system and One-way ANOVA, and Tukey's test was applied (á = 0.05). The hardness decreased from the surface (601.17 VHN) to 150 ìm (204.03 VHN). The group CS 75 percent/141°C presented higher hardness than the other groups, revealing higher surface contamination, but there were no differences among the groups at measurements deeper than 150 ìm. The castings made with CS - 100 percent/70°C presented the lowest levels of marginal misfit, followed by RE -100 percent/237°C. The conventional investments CS (100 percent) and RE (100 percent) showed better marginal fit than RP, but the CS (75 percent) had higher surface contamination.
Mots clés
Texte intégral:
1
Indice:
LILACS
Sujet Principal:
Phosphates
/
Titane
/
Adaptation marginale (odontologie)
/
Couronnes
/
Revêtement coulée dentaire
langue:
En
Texte intégral:
Braz. oral res
Thème du journal:
ODONTOLOGIA
Année:
2010
Type:
Article
/
Project document