Dynamic monitoring of refractive index change through photoactive resins

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Dynamic monitoring of refractive index change through photoactive resins. / Hadis, Mohammed; Tomlins, Peter; Shortall, Adrian; Palin, William.

In: Dental Materials, Vol. 26, No. 11, 01.11.2010, p. 1106-1112.

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@article{05898ad3f5144846b699e7cc4841c738,
title = "Dynamic monitoring of refractive index change through photoactive resins",
abstract = "OBJECTIVES: The change in optical characteristics through the bulk of curing photopolymers is not fully understood. Photopolymerization processes are accompanied by photoinitiator absorption, density changes and volumetric shrinkage, which alter optical properties and affects curing efficiency through depth. METHODS: This investigation demonstrates the use of a novel low coherence interferometry technique for simultaneous measurement of optical (refractive index) and physical (shrinkage) properties throughout curing of photoactive monomers containing various concentrations of bisphenol-A-diglycidyl ether dimethacrylate and triethylene glycol dimethacrylate. RESULTS: Reliability of the interferometry technique was compared with an Abb{\'e} refractometer and showed a significant linear regression relationship (p0.99) for both uncured and cured resins. The extent and rate of refractive index change and magnitude of shrinkage strain was dependent upon monomer formulation. SIGNIFICANCE: The development of this interferometry technique provides a powerful non-invasive tool that will be useful for improving light transmission through photoactive resins and filled resin composites by precise control of optical properties through material bulk.",
keywords = "Photopolymerization, Shrinkage strain, Interferometry, Refractive index",
author = "Mohammed Hadis and Peter Tomlins and Adrian Shortall and William Palin",
year = "2010",
month = nov,
day = "1",
doi = "10.1016/j.dental.2010.07.011",
language = "English",
volume = "26",
pages = "1106--1112",
journal = "Dental Materials",
issn = "0109-5641",
publisher = "Elsevier",
number = "11",

}

RIS

TY - JOUR

T1 - Dynamic monitoring of refractive index change through photoactive resins

AU - Hadis, Mohammed

AU - Tomlins, Peter

AU - Shortall, Adrian

AU - Palin, William

PY - 2010/11/1

Y1 - 2010/11/1

N2 - OBJECTIVES: The change in optical characteristics through the bulk of curing photopolymers is not fully understood. Photopolymerization processes are accompanied by photoinitiator absorption, density changes and volumetric shrinkage, which alter optical properties and affects curing efficiency through depth. METHODS: This investigation demonstrates the use of a novel low coherence interferometry technique for simultaneous measurement of optical (refractive index) and physical (shrinkage) properties throughout curing of photoactive monomers containing various concentrations of bisphenol-A-diglycidyl ether dimethacrylate and triethylene glycol dimethacrylate. RESULTS: Reliability of the interferometry technique was compared with an Abbé refractometer and showed a significant linear regression relationship (p0.99) for both uncured and cured resins. The extent and rate of refractive index change and magnitude of shrinkage strain was dependent upon monomer formulation. SIGNIFICANCE: The development of this interferometry technique provides a powerful non-invasive tool that will be useful for improving light transmission through photoactive resins and filled resin composites by precise control of optical properties through material bulk.

AB - OBJECTIVES: The change in optical characteristics through the bulk of curing photopolymers is not fully understood. Photopolymerization processes are accompanied by photoinitiator absorption, density changes and volumetric shrinkage, which alter optical properties and affects curing efficiency through depth. METHODS: This investigation demonstrates the use of a novel low coherence interferometry technique for simultaneous measurement of optical (refractive index) and physical (shrinkage) properties throughout curing of photoactive monomers containing various concentrations of bisphenol-A-diglycidyl ether dimethacrylate and triethylene glycol dimethacrylate. RESULTS: Reliability of the interferometry technique was compared with an Abbé refractometer and showed a significant linear regression relationship (p0.99) for both uncured and cured resins. The extent and rate of refractive index change and magnitude of shrinkage strain was dependent upon monomer formulation. SIGNIFICANCE: The development of this interferometry technique provides a powerful non-invasive tool that will be useful for improving light transmission through photoactive resins and filled resin composites by precise control of optical properties through material bulk.

KW - Photopolymerization

KW - Shrinkage strain

KW - Interferometry

KW - Refractive index

U2 - 10.1016/j.dental.2010.07.011

DO - 10.1016/j.dental.2010.07.011

M3 - Article

C2 - 20692029

VL - 26

SP - 1106

EP - 1112

JO - Dental Materials

JF - Dental Materials

SN - 0109-5641

IS - 11

ER -