Surface Hardness of Glass Ionomer Cements used in Atraumatic Restorative Treatment
Pesqui. bras. odontopediatria clín. integr
;
16(1): 449-455, jan.-dez. 2016. tab
Article
in English
| LILACS, BBO
| ID: biblio-912901
ABSTRACT
Objective:
To evaluate the surface hardness of a national glass ionomer cement with increased powder / liquid ratio, suitable for the atraumatic restorative treatment technique. Material andMethods:
This is a study of the quantitative experimental type, in which 30 specimens were made and divided equally into 03 experimental groups (glass ionomer cement restorative Vitro Molar -DFL in the proportion specified by the manufacturer; glass ionomer cement restorative Vitro molar ratio -DFL modified with incorporation of 50% powder; and Gold Label 9 - GC Corporation in the proportion specified by the manufacturer). After handling, the materials were placed in a Teflon mold for manufacturing the cylindrical samples (5mm x 2 mm), with the aid of a Centrix syringe (Centrix, Shelton, CT, USA). Specimens were stored in liquid petroleum jelly at a temperature 37 ° ± 1 for up to 7 days. The specimens were evaluated by Vickers hardness test at time intervals of 24 hours and 7 days after manufacture. The data were subjected to the Independent Student's-t tests and analysis of variance (ANOVA), and subsequently by Tukey's test at 95% level of significance.Results:
The setting time positively influenced the hardness of the two glass ionomer cements (p<0,001). Cement Gold Label 9 showed higher hardness values than cement Vitro Molar (p<0,001), irrespective of the evaluation time interval. The latter in turn, showed improved values when manipulated with the modified powder / liquid ratio (3 2) (p<0,001).Conclusion:
Vitro Molar glass ionomer cement showed higher hardness values when manipulated with the modified powder/liquid ratio.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Dental Atraumatic Restorative Treatment
/
Glass Ionomer Cements
/
Hardness Tests
Type of study:
Evaluation studies
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Pesqui. bras. odontopediatria clín. integr
Journal subject:
Dentistry
Year:
2016
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal Institute of Education, Science and Technology of Piauí/BR
/
Federal University of Piauí/BR
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