Impact fracture strength applied to dental modeling materials
Braz. j. oral sci
;
6(21): 1349-1352, Apr.-June 2007. ilus
Article
in English
| LILACS, BBO
| ID: biblio-850538
ABSTRACT
The aim of the present study was to analyze the impact fracture strength using plaster and resin modeling materials. The analysis was made using nine dies having plaster III bases and internal portion of laboratory-type addition silicone. Nine test specimens were produced of each following material: typeIV Durone plaster, type IV Fuji Rock plaster, type IV Rock Plus plaster, type V Durone plaster, Epoxiglass 1504 epoxy resin, epoxy resin modified with diatomite and epoxy resin modified with diatomite. The tests were performed in a Ceast testing machine. At the moment of fracture, the machine recorded avalue (Energy), using a formula to obtain the impact strength value in joules per meter. Statistical and variance analyses and Student's t test revealed that pure or silanized diatomite increased the impact fracture strength of models made of Epoxiglass 1504 epoxy resin and that silanizing the filler led toa further gain in impact fracture strength. The models made of Epoxiglass 1504 displayed greater impact fracture strength than those made of plaster types IV and V. No statistically significant differences were found among the analyzed plasters. Models prepared with epoxy resin displayed in general greater impact fracture strength than models made of plasters.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Dental Impression Materials
/
Dental Materials
/
Epoxy Resins
/
Physical Phenomena
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2007
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
São Carlos Federal University/BR
/
Vale do Rio Verde University/BR
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