Evaluation of cracks associated with ultrasonic root-end preparation

Carol A. Layton, J (Gordon) Marshall, Leslie A. Morgan, John (Craig) Baumgartner

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

The purpose of this study was to evaluate the integrity of resected root-end surfaces of extracted human teeth after using ultrasonic tips at low or high frequencies for root-end preparation. Thirty bilaterally matched pairs of single-rooted human teeth had root-end resections using a low-speed diamond saw and were examined for root-end cracks. The matched pairs of teeth were then divided into two experimental groups, with one member of each pair being placed in each group. In group 1, root-end preparations were made with an ultrasonic tip on the lowest frequency setting. The preparations in group 2 were done on the highest power setting. Two investigators again examined the resected root-ends using a stereomicroscope at ×20 to ×63 and recorded the numbers, types, and location of the cracks. Three types of cracks were observed: canal cracks, intradentin cracks, and cemental cracks. There were significantly more root-ends with cracks after ultrasonic root-end preparation than after root-end resection only. In root-ends that had any cracks, significantly more canal cracks per root occurred when the ultrasonic tip was used on the high-frequency setting for root-end preparation than when the ultrasonic tip was used on the low power setting.

Original languageEnglish (US)
Pages (from-to)157-160
Number of pages4
JournalJournal of Endodontics
Volume22
Issue number4
StatePublished - 1996
Externally publishedYes

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Ultrasonics
Tooth
Tooth Root
Diamond
Research Personnel

ASJC Scopus subject areas

  • Dentistry(all)

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Evaluation of cracks associated with ultrasonic root-end preparation. / Layton, Carol A.; Marshall, J (Gordon); Morgan, Leslie A.; Baumgartner, John (Craig).

In: Journal of Endodontics, Vol. 22, No. 4, 1996, p. 157-160.

Research output: Contribution to journalArticle

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