Diametral tensile strength and film thickness of an experimental dental luting agent derived from castor oil


Autoria(s): Carmello, Juliana Cabrini; Grassi Fais, Laiza Maria; de Moraes Ribeiro, Ligia Nunes; Neto, Salvador Claro; Guaglianoni, Dalton Geraldo; Pereira Pinelli, Ligia Antunes
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

06/11/2013

06/11/2013

2012

Resumo

The need to develop new dental luting agents in order to improve the success of treatments has greatly motivated research. Objective: The aim of this study was to evaluate the diametral tensile strength (DTS) and film thickness (FT) of an experimental dental luting agent derived from castor oil (COP) with or without addition of different quantities of filler (calcium carbonate - CaCO3). Material and Methods: Eighty specimens were manufactured (DTS N=40; FT N=40) and divided into 4 groups: Pure COP; COP 10%; COP 50% and zinc phosphate (control). The cements were mixed according to the manufacturers' recommendations and submitted to the tests. The DTS test was performed in the MTS 810 testing machine (10 KN, 0.5 mm/min). For FT test, the cements were sandwiched between two glass plates (2 cm(2)) and a load of 15 kg was applied vertically on the top of the specimen for 10 min. The data were analyzed by means of one-way ANOVA and Tukey's test (alpha=0.05). Results: The values of DTS (MPa) were: Pure COP- 10.94 +/- 1.30; COP 10%- 30.06 +/- 0.64; COP 50%- 29.87 +/- 0.27; zinc phosphate- 4.88 +/- 0.96. The values of FT (pm) were: Pure COP- 31.09 +/- 3.16; COP 10%- 17.05 +/- 4.83; COP 50%- 13.03 +/- 4.83; Zinc Phosphate- 20.00 +/- 0.12. One-way ANOVA showed statistically significant differences among the groups (DTS - p=1.01E-40; FT - p=2.4E-10). Conclusion: The experimental dental luting agent with 50% of filler showed the best diametral tensile strength and film thickness.

FAPESP [06/02821-8, 06/00082-3, 07/02441-3]

FAPESP

Identificador

JOURNAL OF APPLIED ORAL SCIENCE, BAURU-SP, v. 20, n. 1, supl. 18, Part 2, pp. 16-20, JAN-FEB, 2012

1678-7757

http://www.producao.usp.br/handle/BDPI/42267

10.1590/S1678-77572012000100004

http://dx.doi.org/10.1590/S1678-77572012000100004

Idioma(s)

eng

Publicador

UNIV SAO PAULO FAC ODONTOLOGIA BAURU

BAURU-SP

Relação

JOURNAL OF APPLIED ORAL SCIENCE

Direitos

openAccess

Copyright UNIV SAO PAULO FAC ODONTOLOGIA BAURU

Palavras-Chave #DENTAL PROSTHESIS #BIOCOMPATIBLE MATERIALS #RICINUS COMMUNIS #CALCIUM CARBONATE #ZINC PHOSPHATE CEMENT #TENSILE STRENGTH #BONE REGENERATION #POLYURETHANE #CEMENTS #STRESS #CROWNS #DENTISTRY, ORAL SURGERY & MEDICINE
Tipo

article

original article

publishedVersion