Publication
Slurry preparation methods affect dental porcelain reliability
| dc.contributor.author | Pelaez-Vargas, Alejandro | |
| dc.contributor.author | Dussán, Jaime A. | |
| dc.contributor.author | Restrepo, Luís F. | |
| dc.contributor.author | Paucar, Carlos | |
| dc.contributor.author | Ferreira, Jorge Amaral | |
| dc.contributor.author | Monteiro, Fernando J. | |
| dc.date.accessioned | 2015-04-11T17:34:50Z | |
| dc.date.available | 2015-04-11T17:34:50Z | |
| dc.date.issued | 2011-05 | |
| dc.description.abstract | One-step and incremental mixing procedures are currently used to produce dental ceramic pastes. In the ceramic industry, high quality is obtained using one-step mixing, but in dentistry, the best method has not been yet determined. The purpose of this study is to evaluate the effects of 2 mixing techniques on the biaxial flexural strength and microstructure of dental porcelain. Feldspathic porcelain discs (2 × 15 mm in diameter) were produced and divided according to the ceramic paste preparation method, powder-liquid incremental mixing group (n=50) or one-step mixing, as a control group (n=50). Specimens were tested for biaxial flexural strength and characterized using porosimetry, relative humidity, SEM/EDS, XRD, and FT-IR analyses. Statistical analysis was conducted using Weibull statistics. The Weibull modulus, characteristic strength and relative humidity were compared between groups, using Student's t-test and Mann-Whitney U test (a=.05). The powder-liquid incremental mixing group showed significantly higher values (SD) of Weibull modulus (6.74 (0.70), P<.001) and characteristic strength (79.87 (2.01) MPa, P<.001) when compared to the one-step mixing group (4.94 (0.94) and 75.95 (2.61) MPa). Significantly lower mean (SD) relative humidity values (P=.009) were found for powder-liquid incremental mixing group (20% (0.5%)) compared to one-step mixing group (22% (1%)). XRD spectra showed that the one-step mixing group produced higher amounts of the amorphous phase. Specimens produced by the incremental mixing technique showed higher biaxial flexural strength than one-step mixing. | por |
| dc.identifier.citation | Pelaez-Vargas, Alejandro... [et al.] - Slurry preparation methods affect dental porcelain reliability. In: The Journal of Prosthetic Dentistry, Vol. 105, Issue 5 (May 2011), p. 308-314 | por |
| dc.identifier.issn | 0022-3913 | |
| dc.identifier.uri | http://hdl.handle.net/10400.9/2713 | |
| dc.language.iso | eng | por |
| dc.subject | Cerâmica | por |
| dc.subject | Indústria cerâmica | por |
| dc.subject | Medicina | por |
| dc.title | Slurry preparation methods affect dental porcelain reliability | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.title | The Journal of Prosthetic Dentistry | por |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |