Influence of light-curing sources on polymerization reaction kinetics of a restorative system

Paulo H.P. D'Alpino, Nádia R. Svizero, José Carlos Pereira, Frederick Rueggeberg, Ricardo M. Carvalho, David Henry Pashley

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Purpose: To determine the effect of using a variety of commercial light-curing units on polymerization of a dentin-bonding agent (Adper Single Bond) and of a resin composite (Filtek Z250). Methods: Infrared (IR) spectra were obtained kinetically at one scan/second at 2 cm-1 resolution for a period of 5 minutes and were analyzed for: maximum conversion rate (%/s), time into exposure when maximum rate occurred (seconds), conversion at maximum rate (%), and total conversion (%) at 300 seconds by comparison of aliphatic-to-aromatic absorption IR peak ratios, before and after polymerization. Light units used were: QTH 540 mW/cm2 (XL3000); LED 750 mW/cm2 (Elipar FreeLight 2); PAC 2,130 mW/cm2 (ARC II). Exposure followed manufacturers' recommendations: dentin bonding agent for 10 seconds, RC for 20 seconds (QTH), and 10 seconds (LED and PAC). Polymerization kinetics was evaluated at the bottom surface (2.5 mm thick) for the resin composite and as a thin film for the dentin bonding agent on the diamond surface of an attenuated total reflectance accessory in the IR spectrometer. Values (n=5) were compared using ANOVA and Tukey's pairwise post-hoc test: pre-set alpha 0.05. Results: PAC produced the highest total conversion and conversion rate for the resin composite (P< 0.05). Total conversion was lower for dentin bonding adhesive using PAC than with LED or QTH (P< 0.05). LED provided the highest proportion of conversion at the maximum rate with respect to conversion at 300 seconds for both materials. QTH demonstrated the lowest maximum rate value that occurred at a longer time into exposure (P< 0.05). Polymerization kinetic parameters varied greatly between the restorative materials as well as among light-curing unit types when compared to values observed when using a QTH light as control.

Original languageEnglish (US)
Pages (from-to)46-52
Number of pages7
JournalAmerican journal of dentistry
Volume20
Issue number1
StatePublished - Feb 1 2007

Fingerprint

Dentin-Bonding Agents
Polymerization
Light
Composite Resins
AIDS-Related Complex
Diamond
Dentin
Adhesives
Analysis of Variance

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

D'Alpino, P. H. P., Svizero, N. R., Pereira, J. C., Rueggeberg, F., Carvalho, R. M., & Pashley, D. H. (2007). Influence of light-curing sources on polymerization reaction kinetics of a restorative system. American journal of dentistry, 20(1), 46-52.

Influence of light-curing sources on polymerization reaction kinetics of a restorative system. / D'Alpino, Paulo H.P.; Svizero, Nádia R.; Pereira, José Carlos; Rueggeberg, Frederick; Carvalho, Ricardo M.; Pashley, David Henry.

In: American journal of dentistry, Vol. 20, No. 1, 01.02.2007, p. 46-52.

Research output: Contribution to journalArticle

D'Alpino, PHP, Svizero, NR, Pereira, JC, Rueggeberg, F, Carvalho, RM & Pashley, DH 2007, 'Influence of light-curing sources on polymerization reaction kinetics of a restorative system', American journal of dentistry, vol. 20, no. 1, pp. 46-52.
D'Alpino, Paulo H.P. ; Svizero, Nádia R. ; Pereira, José Carlos ; Rueggeberg, Frederick ; Carvalho, Ricardo M. ; Pashley, David Henry. / Influence of light-curing sources on polymerization reaction kinetics of a restorative system. In: American journal of dentistry. 2007 ; Vol. 20, No. 1. pp. 46-52.
@article{e06781130a44443da92eb62c746ce689,
title = "Influence of light-curing sources on polymerization reaction kinetics of a restorative system",
abstract = "Purpose: To determine the effect of using a variety of commercial light-curing units on polymerization of a dentin-bonding agent (Adper Single Bond) and of a resin composite (Filtek Z250). Methods: Infrared (IR) spectra were obtained kinetically at one scan/second at 2 cm-1 resolution for a period of 5 minutes and were analyzed for: maximum conversion rate ({\%}/s), time into exposure when maximum rate occurred (seconds), conversion at maximum rate ({\%}), and total conversion ({\%}) at 300 seconds by comparison of aliphatic-to-aromatic absorption IR peak ratios, before and after polymerization. Light units used were: QTH 540 mW/cm2 (XL3000); LED 750 mW/cm2 (Elipar FreeLight 2); PAC 2,130 mW/cm2 (ARC II). Exposure followed manufacturers' recommendations: dentin bonding agent for 10 seconds, RC for 20 seconds (QTH), and 10 seconds (LED and PAC). Polymerization kinetics was evaluated at the bottom surface (2.5 mm thick) for the resin composite and as a thin film for the dentin bonding agent on the diamond surface of an attenuated total reflectance accessory in the IR spectrometer. Values (n=5) were compared using ANOVA and Tukey's pairwise post-hoc test: pre-set alpha 0.05. Results: PAC produced the highest total conversion and conversion rate for the resin composite (P< 0.05). Total conversion was lower for dentin bonding adhesive using PAC than with LED or QTH (P< 0.05). LED provided the highest proportion of conversion at the maximum rate with respect to conversion at 300 seconds for both materials. QTH demonstrated the lowest maximum rate value that occurred at a longer time into exposure (P< 0.05). Polymerization kinetic parameters varied greatly between the restorative materials as well as among light-curing unit types when compared to values observed when using a QTH light as control.",
author = "D'Alpino, {Paulo H.P.} and Svizero, {N{\'a}dia R.} and Pereira, {Jos{\'e} Carlos} and Frederick Rueggeberg and Carvalho, {Ricardo M.} and Pashley, {David Henry}",
year = "2007",
month = "2",
day = "1",
language = "English (US)",
volume = "20",
pages = "46--52",
journal = "American Journal of Dentistry",
issn = "0894-8275",
publisher = "Mosher and Linder, Inc",
number = "1",

}

TY - JOUR

T1 - Influence of light-curing sources on polymerization reaction kinetics of a restorative system

AU - D'Alpino, Paulo H.P.

AU - Svizero, Nádia R.

AU - Pereira, José Carlos

AU - Rueggeberg, Frederick

AU - Carvalho, Ricardo M.

AU - Pashley, David Henry

PY - 2007/2/1

Y1 - 2007/2/1

N2 - Purpose: To determine the effect of using a variety of commercial light-curing units on polymerization of a dentin-bonding agent (Adper Single Bond) and of a resin composite (Filtek Z250). Methods: Infrared (IR) spectra were obtained kinetically at one scan/second at 2 cm-1 resolution for a period of 5 minutes and were analyzed for: maximum conversion rate (%/s), time into exposure when maximum rate occurred (seconds), conversion at maximum rate (%), and total conversion (%) at 300 seconds by comparison of aliphatic-to-aromatic absorption IR peak ratios, before and after polymerization. Light units used were: QTH 540 mW/cm2 (XL3000); LED 750 mW/cm2 (Elipar FreeLight 2); PAC 2,130 mW/cm2 (ARC II). Exposure followed manufacturers' recommendations: dentin bonding agent for 10 seconds, RC for 20 seconds (QTH), and 10 seconds (LED and PAC). Polymerization kinetics was evaluated at the bottom surface (2.5 mm thick) for the resin composite and as a thin film for the dentin bonding agent on the diamond surface of an attenuated total reflectance accessory in the IR spectrometer. Values (n=5) were compared using ANOVA and Tukey's pairwise post-hoc test: pre-set alpha 0.05. Results: PAC produced the highest total conversion and conversion rate for the resin composite (P< 0.05). Total conversion was lower for dentin bonding adhesive using PAC than with LED or QTH (P< 0.05). LED provided the highest proportion of conversion at the maximum rate with respect to conversion at 300 seconds for both materials. QTH demonstrated the lowest maximum rate value that occurred at a longer time into exposure (P< 0.05). Polymerization kinetic parameters varied greatly between the restorative materials as well as among light-curing unit types when compared to values observed when using a QTH light as control.

AB - Purpose: To determine the effect of using a variety of commercial light-curing units on polymerization of a dentin-bonding agent (Adper Single Bond) and of a resin composite (Filtek Z250). Methods: Infrared (IR) spectra were obtained kinetically at one scan/second at 2 cm-1 resolution for a period of 5 minutes and were analyzed for: maximum conversion rate (%/s), time into exposure when maximum rate occurred (seconds), conversion at maximum rate (%), and total conversion (%) at 300 seconds by comparison of aliphatic-to-aromatic absorption IR peak ratios, before and after polymerization. Light units used were: QTH 540 mW/cm2 (XL3000); LED 750 mW/cm2 (Elipar FreeLight 2); PAC 2,130 mW/cm2 (ARC II). Exposure followed manufacturers' recommendations: dentin bonding agent for 10 seconds, RC for 20 seconds (QTH), and 10 seconds (LED and PAC). Polymerization kinetics was evaluated at the bottom surface (2.5 mm thick) for the resin composite and as a thin film for the dentin bonding agent on the diamond surface of an attenuated total reflectance accessory in the IR spectrometer. Values (n=5) were compared using ANOVA and Tukey's pairwise post-hoc test: pre-set alpha 0.05. Results: PAC produced the highest total conversion and conversion rate for the resin composite (P< 0.05). Total conversion was lower for dentin bonding adhesive using PAC than with LED or QTH (P< 0.05). LED provided the highest proportion of conversion at the maximum rate with respect to conversion at 300 seconds for both materials. QTH demonstrated the lowest maximum rate value that occurred at a longer time into exposure (P< 0.05). Polymerization kinetic parameters varied greatly between the restorative materials as well as among light-curing unit types when compared to values observed when using a QTH light as control.

UR - http://www.scopus.com/inward/record.url?scp=33947390380&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33947390380&partnerID=8YFLogxK

M3 - Article

C2 - 17380808

AN - SCOPUS:33947390380

VL - 20

SP - 46

EP - 52

JO - American Journal of Dentistry

JF - American Journal of Dentistry

SN - 0894-8275

IS - 1

ER -