Three methods to measure the photopolymerization kinetics for different radiant emittance and composite type

Photopolymerization kinetics affects the curing time, degree of conversion, polymerization shrinkage, and mechanical properties of composites. The aim of this study was to compare three methods (temperature, heat flow, and polymerization shrinkage) for photopolymerization kinetics measurement of com...

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Bibliographic Details
Published inDental Materials Journal Vol. 43; no. 2; pp. 207 - 215
Main Authors LEE, Chang-Ha, LEE, In-Bog
Format Journal Article
LanguageEnglish
Japanese
Published Japan The Japanese Society for Dental Materials and Devices 25.03.2024
Japanese Society for Dental Materials and Devices
Japan Science and Technology Agency
Subjects
Composite materials
Composite photopolymerization kinetics
Composite Resins
Differential scanning calorimeter
Emittance
Heat flow
Heat transfer
Heat transmission
Hot Temperature
Infrared thermometer
Kinetics
Materials Testing
Measurement methods
Mechanical properties
Photopolymerization
Polymerization
Polymerization shrinkage
Radiant emittance
Temperature
Time measurement
Composite photopolymerization kinetics
Infrared thermometer
Polymerization shrinkage
Radiant emittance
Differential scanning calorimeter
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Summary:Photopolymerization kinetics affects the curing time, degree of conversion, polymerization shrinkage, and mechanical properties of composites. The aim of this study was to compare three methods (temperature, heat flow, and polymerization shrinkage) for photopolymerization kinetics measurement of composites. The photopolymerization kinetics of four composites (2 packable and 2 flowable) were measured with an LED light for 20 s (radiant emittance: 2,100 mW/cm2). For the two packable composites, photopolymerization kinetics was measured with varying the radiant emittance and exposure time. For each measurement method, peak times were determined as the time when maximum temperature rise, heat flow, and shrinkage rate occurred, respectively. The photopolymerization kinetics differed among the measurement methods. The photopolymerization kinetics of composites changed as the radiant emittance and composite type varied. In clinical practice and research on the composite restoration, the kinetics should be considered comprehensively with the complementary use of various measurement methods.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0287-4547
1881-1361
DOI:10.4012/dmj.2023-197