Time-resolved simultaneous measurement of group index and physical thickness during photopolymerization of resin-based dental composite.
J Biomed Opt
; 12(1): 014020, 2007.
Article
em En
| MEDLINE
| ID: mdl-17343495
ABSTRACT
Light-activated resin-based dental composites are increasingly replacing dental amalgam. However, these materials are limited by inefficient setting reactions as a function of depth that constrain the maximum extent of cure. Insufficient curing can contribute to an overall reduction in biocompatibility of the material. We demonstrate dynamic refractive index measurements of a commercial dental composite throughout cure using spectral domain low coherence interferometry. Our results show a linear relationship between the change in refractive index and polymerization-induced reduction in physical thickness during light-activated curing. This relationship between the optical and physical density demonstrates the potential of this technique as a unique noninvasive tool for measurement of the conversion degree of curing dental composite materials.
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Base de dados:
MEDLINE
Assunto principal:
Teste de Materiais
/
Resinas Compostas
/
Tomografia de Coerência Óptica
/
Interferometria
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
J Biomed Opt
Assunto da revista:
ENGENHARIA BIOMEDICA
/
OFTALMOLOGIA
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Reino Unido