| Autor: |
Valente Vda S; Department of Restorative Dentistry, Federal University of Piaui (UFPI), Terezina, PI, Brazil., Zanetti AL, Feltrin PP, Inoue RT, de Moura CD, Pádua LE |
| Jazyk: |
angličtina |
| Zdroj: |
ISRN dentistry [ISRN Dent] 2012; Vol. 2012, pp. 730674. Date of Electronic Publication: 2012 Dec 24. |
| DOI: |
10.5402/2012/730674 |
| Abstrakt: |
Aim. The aim of the present study was to compare the dimensional accuracy of stone casts obtained with vinyl polysiloxane molds through the double-impression technique with three pours into the same mold. Methods. A stainless steel master model was constructed simulating a three-unit fixed prosthesis. Twelve impressions were taken of this master model with addition silicone, using the double-impression technique. Three pours of type IV gypsum were then made into each mold, thus producing 36 casts. The pours were made 1 hour, 6 hours and 24 hours after the impression procedure. Next, intra- and interabutment measurements were made in a coordinate measuring machine. Results. Comparative analysis of the dimensional accuracy of stone casts resulting from multiple pours was not statistically significant in pours first and second (P > 0.05). These values, however, were statistically significant at third pour in the height in abutment 1 and upper distance interabutment. Conclusion. The wait time (1 hour, and 6 hours) observed before pouring the stone into the same molds did not cause significant dimensional accuracy of the casts. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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