Propriedades físico-químicas de cimentos Portland e à base de MTA associados ao Aloe vera
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Data
2013-09-13
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Universidade Federal de Goiás
Resumo
The aim of this study was to determine the solution-powder ration and to
evaluate the setting time, solubility, dimensional change, pH and radiopacity of
White structural and non-structural Portland cement, ProRoot MTA®
and MTA
BIO®
associated to 2% glycolic solution of Aloe vera. Five samples of each
material were used for each test according to American National Standards
Institute/American Dental Association specification 57. Statistical analyses were
carried out using ANOVA and Tukey’s test at 5% level of significance. When
sample distribution was non-normal, nonparametric analysis of variance were
performed with Kruskal-Wallis test (α=0.05). The results revealed no statistical
difference in the water-powder ratio among the tested materials. ProRoot MTA®
had the longest setting time (116.50 ± 4.08) (P<0.05). White structural and nonstructural
Portland cements did not have means values on the radiopacity test
(109.76 ± 10.40 and 118.75 ± 15.44, respectively) in accordance with
ANSI/ADA, being significantly different from the MTA-based cements (P<0.05),
and demonstrated higher mean solubility values (2.30 ± 0.36 and 2.81 ± 0.40,
respectively) (P<0.05). The values for dimensional change of all tested materials
were considered acceptable by ANSI/ADA. There were no significant differences
between the mean pH values recorded for the materials (p>0.05). It was alkaline
from the beginning to the end of the tests. MTA BIO presented lower setting time
and lower solubility. The cements did not showed a higher solubility than 3%. All
the assessed cements showed acceptable values of dimensional variation and
high pH during the test time. MTA BIO and ProRoot MTA had adequate
radiopacity values.
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Citação
ZINA, Omar. Propriedades físico-químicas de cimentos Portland e à base de MTA associados ao Aloe vera. 2013. 101 f. Tese (Doutorado em Ciências da Saúde) - Universidade Federal de Goiás, Goiânia, 2013.