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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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The production of a root surface smear layer by instrumentation and its removal by citric acid.

The purpose of this study was to characterize, using the scanning electron microscope, the nature of root surfaces denuded by (1) root planing alone or (2) root planing plus citric acid treatment. Six teeth were extracted from three squirrel monkeys, and the coronal half of the root surface was planed to remove attached periodontal ligament fibers and cementum. Citric acid, pH 1, was topically applied to the denuded surfaces of 3 teeth. The surface of only root-planed specimens had an irregular surface which corresponded to a smear layer. Root surfaces that had received acid treatment after root planing exhibited funnel-shaped orifices of dentinal tubules, and intertubular zones with a fibrillar, mat-like morphology. The implications of the different root-surface characteristics are discussed.[1]

References

  1. The production of a root surface smear layer by instrumentation and its removal by citric acid. Polson, A.M., Frederick, G.T., Ladenheim, S., Hanes, P.J. J. Periodontol. (1984) [Pubmed]
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