Depth and distribution of the cure in a resin-based composite cured in a simulated Class II cavity

Robert L. Erickson, Wayne W. Barkmeier

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose: To examine the effect that a stainless steel (SS) matrix band has on the depth and distribution of cure of a resin-based composite (RBC) in a simulated Class II cavity. Methods: RBC was cured for 20 seconds in a simulated Class II cavity with and without a SS matrix band, and after 24 hours the specimens were scraped back and ground to expose a vertical central plane where Knoop micro-hardness (KHN) mapping was conducted from 0.05 - 1.5 mm from the band and in 0.5 mm intervals from the top of the specimens. The effect of different angles of the light guide on the distribution of hardness was also examined. Results: KHN values near the SS matrix band were significantly lower (P<0.05) than within the bulk of the specimen and were lower than those found without the matrix band. Angles of incidence for the curing light-guide produced changes in the distribution of KHN within the specimens, but particularly near the matrix band, and with a 35° angle of incidence, the depth of cure was significantly different from that of normal incidence of the light.

Original languageEnglish
Pages (from-to)51-57
Number of pages7
JournalAmerican Journal of Dentistry
Volume29
Issue number1
StatePublished - Feb 1 2016

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Matrix Bands
Composite Resins
Hardness
Stainless Steel
Light
Incidence

All Science Journal Classification (ASJC) codes

  • Dentistry(all)
  • Medicine(all)

Cite this

Depth and distribution of the cure in a resin-based composite cured in a simulated Class II cavity. / Erickson, Robert L.; Barkmeier, Wayne W.

In: American Journal of Dentistry, Vol. 29, No. 1, 01.02.2016, p. 51-57.

Research output: Contribution to journalArticle

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