Date of Award

2015

Document Type

Thesis

Department

Chemistry

First Advisor

Jack Ferracane

Subjects

Dental resins -- Spectra, Dental resins -- Analysis, Gums and resins, Synthetic -- Curing -- Evaluation

DOI

10.15760/honors.173

Abstract

Objective: To compare the light-transmission and spectral output of a polywave and monowave LCU thru two different composites at varying thicknesses.

Methods: For irradiance measurements two bulk fill composites (n=3) containing different photoinitiators: CQ-based (SonicFill, Kerr) and TPO and CQ-based (Tetric EvoCeram, Ivoclar Vivadent) were prepared in Delrin molds of varying thicknesses (1mm, 2mm, and 3mm). A Resin Calibrator (MARC Resin Calibrator, BlueLight Analytics) was used to determine irradiance and spectrum of two different curing lights as the samples were cured for 20 seconds: a polywave (Bluephase G2, Ivoclar Vivadent) and a monowave (SmartLite Focus, DENTSPLY) LCUs.

Results: The polywave LCU had two peaks at about 407nm (violet) and at 455.58nm (blue) and the monowave had one peak at 473.04nm (blue). For both LCUs, the TPO- and CQ-based composite had a higher percentage of irradiance transmitted thru all three thicknesses when compared to the CQ-based composite. When comparing curing lights the monowave had a higher percent transmittance thru both of the composites compared to the polywave unit.

Comments

An undergraduate honors thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in University Honors and Biochemistry

Persistent Identifier

http://archives.pdx.edu/ds/psu/15560

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