Journal of Conservative Dentistry
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Year : 2010  |  Volume : 13  |  Issue : 2  |  Page : 65-70

In vitro comparison of the radiopacity of cavity lining materials with human dental structures

1 Department of Dental Materials and Prosthodontics, Ribeirao Preto School of Dentistry, University of São Paulo, Ribeirao Preto, SP, Brazil
2 Department of Morphology, Stomatology, and Physiology, Ribeirao Preto School of Dentistry, University of São Paulo, Ribeirao Preto, SP, Brazil

Correspondence Address:
Lucas FR Garcia
Rua Bernardino de Campos, 30 - apto. 1002, Bairro Higienópolis, 14015-130, Ribeirão Preto, SP
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-0707.66713

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Aim: To compare the optical densities (OD) of calcium hydroxide (CH) and glass ionomer cement with the same thicknesses of the dental structures. Materials and Methods: Eighteen specimens of each material, with thicknesses of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mm were made in a Teflon matrix. To compare the radiopacity of the materials with the dental structures, dental cuts of the first molars, increasing in thickness from 0.5 to 3.0 mm, were obtained. To standardize the radiographs, a transparent acrylic matrix (Standardizing Device) was developed and used. Thirty radiographs were taken, five for each tested material. Results: Statistical analysis (Two-way ANOVA - Bonferroni, P < 0.05) demonstrated that when the materials were compared, there was statistically significant difference between the ODs, only for the thickness of 1.0 mm (P < 0.05). Conclusion: The thickness of the material contributed to its radiopacity, and these materials had to be used in a thickness between 1.5 and 2.0 mm.

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