Abstract
Temperature affects the polymerization behavior of dimethacrylate-based materials. This study describes the influence of pre-polymerization temperature and exposure duration on polymerization kinetics of a commercial dental photo-activated composite at the top and at 2-mm depth. We used the temperature-controlled stage of a diamond-attenuated-total-reflectance unit to pre-set composite temperature between 3° and 60°C. Composite was light-exposed by a conventional quartz-tungsten-halogen curing unit for 5, 10, 20, or 40 sec. Real-time conversion, maximum conversion rate (Rpmax), time to achieve Rpmax, and conversion at Rpmax were calculated from infrared spectra. Composite pre-warming enhanced maximal polymerization rate and overall monomer conversion (top significantly greater than 2 mm). Time when Rpmax occurred did not change with temperature, but occurred sooner at the top than at 2-mm depth. Conversion at Rp max increased with temperature, allowing more of the reaction to occur prior to vitrification than at room temperature.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 38-43 |
| Number of pages | 6 |
| Journal | Journal of Dental Research |
| Volume | 85 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 2006 |
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Keywords
- Curing temperature
- Kinetics
- Monomer conversion
- Polymerization rate
- Resin composite
ASJC Scopus subject areas
- Dentistry(all)
Cite this
Polymerization kinetics of pre-heated composite. / Daronch, M.; Rueggeberg, F. A.; De Goes, M. F.; Giudici, R.
In: Journal of Dental Research, Vol. 85, No. 1, 01.01.2006, p. 38-43.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Polymerization kinetics of pre-heated composite
AU - Daronch, M.
AU - Rueggeberg, F. A.
AU - De Goes, M. F.
AU - Giudici, R.
PY - 2006/1/1
Y1 - 2006/1/1
N2 - Temperature affects the polymerization behavior of dimethacrylate-based materials. This study describes the influence of pre-polymerization temperature and exposure duration on polymerization kinetics of a commercial dental photo-activated composite at the top and at 2-mm depth. We used the temperature-controlled stage of a diamond-attenuated-total-reflectance unit to pre-set composite temperature between 3° and 60°C. Composite was light-exposed by a conventional quartz-tungsten-halogen curing unit for 5, 10, 20, or 40 sec. Real-time conversion, maximum conversion rate (Rpmax), time to achieve Rpmax, and conversion at Rpmax were calculated from infrared spectra. Composite pre-warming enhanced maximal polymerization rate and overall monomer conversion (top significantly greater than 2 mm). Time when Rpmax occurred did not change with temperature, but occurred sooner at the top than at 2-mm depth. Conversion at Rp max increased with temperature, allowing more of the reaction to occur prior to vitrification than at room temperature.
AB - Temperature affects the polymerization behavior of dimethacrylate-based materials. This study describes the influence of pre-polymerization temperature and exposure duration on polymerization kinetics of a commercial dental photo-activated composite at the top and at 2-mm depth. We used the temperature-controlled stage of a diamond-attenuated-total-reflectance unit to pre-set composite temperature between 3° and 60°C. Composite was light-exposed by a conventional quartz-tungsten-halogen curing unit for 5, 10, 20, or 40 sec. Real-time conversion, maximum conversion rate (Rpmax), time to achieve Rpmax, and conversion at Rpmax were calculated from infrared spectra. Composite pre-warming enhanced maximal polymerization rate and overall monomer conversion (top significantly greater than 2 mm). Time when Rpmax occurred did not change with temperature, but occurred sooner at the top than at 2-mm depth. Conversion at Rp max increased with temperature, allowing more of the reaction to occur prior to vitrification than at room temperature.
KW - Curing temperature
KW - Kinetics
KW - Monomer conversion
KW - Polymerization rate
KW - Resin composite
UR - http://www.scopus.com/inward/record.url?scp=33644975962&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33644975962&partnerID=8YFLogxK
U2 - 10.1177/154405910608500106
DO - 10.1177/154405910608500106
M3 - Article
C2 - 16373678
AN - SCOPUS:33644975962
VL - 85
SP - 38
EP - 43
JO - Journal of Dental Research
JF - Journal of Dental Research
SN - 0022-0345
IS - 1
ER -