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Clinical and microbiological performance of resin-modified glass-ionomer liners after incomplete dentine caries removal

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Abstract

The aims of this study were to evaluate clinically and microbiologically the effects of two resin-modified glass-ionomer cements (RMGICs) used as liners after incomplete dentine caries removal and to identify Streptococcus mutans and Streptococcus sobrinus strains isolated from dentine samples, before and after indirect pulp treatment. Twenty-seven primary molars with deep carious lesions, but without signs and symptoms of irreversible pulpitis, were submitted to indirect pulp treatment. Treatment consisted of incomplete excavation of the carious dentine, application of one of the RMGICs (Vitrebond or Fuji Lining LC) or calcium hydroxide cement (Dycal), and sealing for 3 months. Clinical evaluation (consistency, color, and wetness of dentine) and carious dentine collects were performed before temporary sealing and after the experimental period. Microbiological samples were cultivated in specific media for subsequent counting of mutans streptococci (MS) and lactobacilli (LB). MS colonies were selected for identification of S. mutans and S. sobrinus by polymerase chain reaction. After 3 months, the remaining dentine was hard and dry, and there was a significant decrease in the number of MS and LB, in all groups, although complete elimination was not achieved in 33% and 26% of the teeth for MS and LB, respectively. From 243 MS colonies selected, 216 (88.9%) were identified as S. mutans and only 2 (0.8%) as S. sobrinus. The use of resin-modified glass-ionomer liners after incomplete caries removal, as well as a calcium hydroxide cement, promoted significant reduction of the viable residual cariogenic bacteria in addition to favorable clinical changes in the remaining carious dentine.

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Acknowledgements

The authors gratefully thank Andréia Cristina Celi and Carina Bento Luis Macera for laboratorial assistance. This work was supported by the Brazilian research agencies Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP; grant 04/00677-1) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq; grant 520079/00-0).

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The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Department of Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, São Paulo State University (UNESP), Rua Humaitá, 1680, Araraquara, São Paulo, Brazil

    Cristiane Duque, Nancy Tomoko Sacono & Josimeri Hebling

  2. Department of Physiology and Pathology, Araraquara School of Dentistry, São Paulo State University (UNESP), Rua Humaitá, 1680, Araraquara, São Paulo, Brazil

    Thais de Cássia Negrini, Denise Madalena Palomari Spolidorio & Carlos Alberto de Souza Costa

  3. São Paulo State University/UNESP, Rua Humaitá, 1680, 14.801-903, Araraquara, São Paulo, Brazil

    Josimeri Hebling

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  1. Cristiane Duque
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  2. Thais de Cássia Negrini
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  3. Nancy Tomoko Sacono
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  5. Carlos Alberto de Souza Costa
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  6. Josimeri Hebling
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Correspondence to Josimeri Hebling.

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Duque, C., Negrini, T.C., Sacono, N.T. et al. Clinical and microbiological performance of resin-modified glass-ionomer liners after incomplete dentine caries removal. Clin Oral Invest 13, 465–471 (2009). https://doi.org/10.1007/s00784-009-0304-2

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  • DOI: https://doi.org/10.1007/s00784-009-0304-2

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