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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

September 2007
Volume 38 , Issue 8

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Root surfaces after ultrasonic instrumentation with a polishing fluid

Andreas Braun, DDS, PhD / Anna Cichocka, DDS / Enas Semaan, DDS / Felix Krause, DDS / Soren Jepsen, DDS, MS, PhD / Matthias Frentzen, DDS, PhD

PMID: 17823673

Objective: The recently introduced Vector system is recommended to be used in conjunction with a polishing fluid containing hydroxylapatite granules (< 10 m). The aim of the present study was to assess morphologic alterations of the root surface after ultrasonic treatment with the polishing fluid. Method and Materials: Cementum of 30 freshly extracted human teeth was removed to a level of 4 mm below the cementoenamel junction. Surfaces were root-planed and conditioned with citric acid to remove the smear layer. Teeth were divided into 5 groups, with group 1 as the untreated control. Group 2 was solely treated with the ultrasonic system. In group 3, the ultrasonic system was used in conjunction with the polishing fluid. Group 4 was treated with a medium-hard toothbrush and the polishing fluid. Group 5 was treated only with the toothbrush. Specimens were evaluated by both light and scanning electron microscopy. Results: Dentinal tubules were not covered by a smear layer in the control group, whereas in group 2, a smear layer could be observed in some specimens. In group 3 dentinal tubules were always covered by a layer consisting of granules of about 2 m. In group 4 all samples showed a layer containing granules of about 5 m, and in group 5 a thin smear layer could be observed. Conclusion: The use of a polishing fluid containing hydroxylapatite granules during treatment of the root surface results in a granular layer covering the dentinal tubules. This layer may reduce hypersensitivity after ultrasonic subgingival scaling. (Quintessence Int 2007; 38:708.e490496)

Key words:hydroxylapatite, hypersensitivity, smear layer, toothbrush, ultrasonic periodontal treatment, Vector system

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