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 language | English |
|---|---|
| Pages (from-to) | 51-57 |
| Number of pages | 7 |
| Journal | American Journal of Dentistry |
| Volume | 29 |
| Issue number | 1 |
| State | Published - Feb 1 2016 |
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All Science Journal Classification (ASJC) codes
- Dentistry(all)
- Medicine(all)
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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 journal › Article
}
TY - JOUR
T1 - Depth and distribution of the cure in a resin-based composite cured in a simulated Class II cavity
AU - Erickson, Robert L.
AU - Barkmeier, Wayne W.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - 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.
AB - 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.
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M3 - Article
VL - 29
SP - 51
EP - 57
JO - American Journal of Dentistry
JF - American Journal of Dentistry
SN - 0894-8275
IS - 1
ER -