radiopacity of calcium hydroxide cement compared with human tooth structure radiopacidade do cimento de hidróxido de cálcio comparada a das estruturas dentais humanas

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ID: 207568
2004
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Abstract
AIMS: All materials added to teeth should present an adequate radiopacity to allow the detection of secondary caries. Usually, in extensive cavities, base materials like calcium hydroxide cement are used for the purpose of protecting the pulp. In an attempt to improve the efficiency of radiographic detection of this material, this study aimed to determine the radiopacity of three calcium hydroxide cements and to compare the radiopacity of these materials with dentin and enamel. METHODS: Radiographs were taken of 1-mm thick specimens of three calcium hydroxide cements: Hydro-C, Dycal and Life, an aluminium stepwedge, a lead foil, and one 1-mm thick human tooth slice. Densitometric measurements were obtained after radiographic processing. The radiopacity values of the calcium hydroxide cements, dentin and enamel were expressed in terms of the equivalent thickness of aluminium. RESULTS: The analysis of variance indicated statistically significant difference only for Life, which presented the lowest radiopacity when compared to the other cements. However, all cements and enamel possessed a radiopacity equivalent to 2mm Al, while dentin presented a radiopacity equivalent to 1mm Al. CONCLUSION: All tested cements presented a similar radiopacity to that of enamel and they meet the ISO 4049 specifications.
OBJETIVOS: Todos os materiais adicionados aos dentes deveriam apresentar uma adequada radiopacidade para permitir a detecção de cáries secundárias. Geralmente em cavidades extensas, materiais de base, como o cimento de hidróxido de cálcio, são usados com a função de proteger a polpa. Na tentativa de melhorar a eficiência na detecção radiográfica deste material, este estudo foi realizado com o objetivo de determinar a radiopacidade de três cimentos de hidróxido de cálcio e comparar a radiopacidade destes materiais com a da dentina e do esmalte. MATERIAIS E MÉTODO: Foram radiografados corpos de prova de 1 mm de espessura de três cimentos de hidróxido de cálcio: Hydro-C, Dycal e Life, uma escala de densidade de alumínio, uma lâmina de chumbo e um corte de dente humano de 1 mm de espessura. As densidades ópticas foram obtidas após o processamento radiográfico. Os valores de radiopacidade dos cimentos de hidróxido de cálcio, dentina e esmalte foram expressos em espessuras equivalentes de alumínio. RESULTADOS: A análise de variância indicou diferença estatisticamente significativa apenas para o cimento Life que apresentou a menor radiopacidade quando comparado aos outros cimentos. Entretanto, todos os cimentos e o esmalte possuíram uma radiopacidade equivalente a 2 mm de Al, enquanto a dentina apresentava radiopacidade equivalente a 1 mm de Al. CONCLUSÃO: Todos os cimentos testados apresentaram radiopacidades semelhantes à do esmalte, estando de acordo com as especificações da ISO 4049.
Reference Key
devito2004journalradiopacity Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Karina Lopes Devito;Ana Isabel Ortega;Francisco Haiter-Neto
Journal journal of animal and plant sciences
Year 2004
DOI
10.1590/S1678-77572004000400007
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572004000400007
Keywords
enamel radiopacity dentindentistry calcium hydroxide cement

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