Optical properties and colorimetric evaluation of resin cements formulated with thio-urethane oligomers

Atais Bacchi, Ricardo Armini Caldas, Paulo Francisco Cesar, Carmem Pfeifer

Research output: Contribution to journalArticle

Abstract

Objective: The aim of this study was to evaluate the color parameters and optical properties of resin cements (RCs) formulated with thio-urethanes (TUs). Materials and methods: Six TUs were synthesized by combining thiols (pentaerythritol tetra-3-mercaptopropionate [PETMP] or trimethylol-tris-3-mercaptopropionate [TMP]) with di-functional isocyanates (1,6-Hexanediol-diissocyante [HDDI] [aliphatic-AL] or 1,3-bis(1-isocyanato-1-methylethyl) benzene [BDI] [aromatic-AR] or Dicyclohexylmethane 4,4′-Diisocyanate [HMDI] [cyclic-CC]). TUs (20 wt%) were added to a BisGMA/UDMA/TEGDMA matrix. Filler was introduced at 60 wt%. Fluorescence was evaluated through an UV-light emitting equipment. Coordinates L*, a*, and b* were obtained in the black and white reflectance to evaluate the contrast ratio (CR) and translucency parameter (TP00). The coordinates obtained from transmittance were used to evaluate lightness (L*), chroma (C*), color difference (ΔE00) after 6 month, and whiteness index for Dentistry (WID). Results: RCs formulated with TUs presented significantly higher CR, and fluorescence (with T_AR). Significantly lower C*, L*, and TP00 (except for P_AR and T_AL) were also observed in RCs containing TUs. ΔE00 were not significant among the materials. WID was not influenced. Conclusion: RCs composed by TU oligomers present higher CR and lower translucency. The material also present higher fluorescence depending on the oligomer used. Clinical Significance: The use of thio-urethanes to formulate resin cements can ensure a luting material with improved potential to mask colored substrates due to the higher contrast ratio and lower translucency obtained. A final higher fluorescence of restoration is also expected with the use of specific oligomer.

Original languageEnglish (US)
JournalJournal of Esthetic and Restorative Dentistry
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

Resin Cements
Urethane
Fluorescence
Dentistry
Ephrin-A5
Color
Isocyanates
Ultraviolet Rays
Masks
Benzene
Sulfhydryl Compounds
Equipment and Supplies

Keywords

  • colorimetric evaluation
  • optical properties
  • resin cements
  • thio-urethane oligomers

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Optical properties and colorimetric evaluation of resin cements formulated with thio-urethane oligomers. / Bacchi, Atais; Caldas, Ricardo Armini; Cesar, Paulo Francisco; Pfeifer, Carmem.

In: Journal of Esthetic and Restorative Dentistry, 01.01.2018.

Research output: Contribution to journalArticle

@article{3edf87eec63d42268b3f270b783c0f6e,
title = "Optical properties and colorimetric evaluation of resin cements formulated with thio-urethane oligomers",
abstract = "Objective: The aim of this study was to evaluate the color parameters and optical properties of resin cements (RCs) formulated with thio-urethanes (TUs). Materials and methods: Six TUs were synthesized by combining thiols (pentaerythritol tetra-3-mercaptopropionate [PETMP] or trimethylol-tris-3-mercaptopropionate [TMP]) with di-functional isocyanates (1,6-Hexanediol-diissocyante [HDDI] [aliphatic-AL] or 1,3-bis(1-isocyanato-1-methylethyl) benzene [BDI] [aromatic-AR] or Dicyclohexylmethane 4,4′-Diisocyanate [HMDI] [cyclic-CC]). TUs (20 wt{\%}) were added to a BisGMA/UDMA/TEGDMA matrix. Filler was introduced at 60 wt{\%}. Fluorescence was evaluated through an UV-light emitting equipment. Coordinates L*, a*, and b* were obtained in the black and white reflectance to evaluate the contrast ratio (CR) and translucency parameter (TP00). The coordinates obtained from transmittance were used to evaluate lightness (L*), chroma (C*), color difference (ΔE00) after 6 month, and whiteness index for Dentistry (WID). Results: RCs formulated with TUs presented significantly higher CR, and fluorescence (with T_AR). Significantly lower C*, L*, and TP00 (except for P_AR and T_AL) were also observed in RCs containing TUs. ΔE00 were not significant among the materials. WID was not influenced. Conclusion: RCs composed by TU oligomers present higher CR and lower translucency. The material also present higher fluorescence depending on the oligomer used. Clinical Significance: The use of thio-urethanes to formulate resin cements can ensure a luting material with improved potential to mask colored substrates due to the higher contrast ratio and lower translucency obtained. A final higher fluorescence of restoration is also expected with the use of specific oligomer.",
keywords = "colorimetric evaluation, optical properties, resin cements, thio-urethane oligomers",
author = "Atais Bacchi and Caldas, {Ricardo Armini} and Cesar, {Paulo Francisco} and Carmem Pfeifer",
year = "2018",
month = "1",
day = "1",
doi = "10.1111/jerd.12437",
language = "English (US)",
journal = "Journal of Esthetic and Restorative Dentistry",
issn = "1496-4155",
publisher = "Wiley-Blackwell",

}

TY - JOUR

T1 - Optical properties and colorimetric evaluation of resin cements formulated with thio-urethane oligomers

AU - Bacchi, Atais

AU - Caldas, Ricardo Armini

AU - Cesar, Paulo Francisco

AU - Pfeifer, Carmem

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Objective: The aim of this study was to evaluate the color parameters and optical properties of resin cements (RCs) formulated with thio-urethanes (TUs). Materials and methods: Six TUs were synthesized by combining thiols (pentaerythritol tetra-3-mercaptopropionate [PETMP] or trimethylol-tris-3-mercaptopropionate [TMP]) with di-functional isocyanates (1,6-Hexanediol-diissocyante [HDDI] [aliphatic-AL] or 1,3-bis(1-isocyanato-1-methylethyl) benzene [BDI] [aromatic-AR] or Dicyclohexylmethane 4,4′-Diisocyanate [HMDI] [cyclic-CC]). TUs (20 wt%) were added to a BisGMA/UDMA/TEGDMA matrix. Filler was introduced at 60 wt%. Fluorescence was evaluated through an UV-light emitting equipment. Coordinates L*, a*, and b* were obtained in the black and white reflectance to evaluate the contrast ratio (CR) and translucency parameter (TP00). The coordinates obtained from transmittance were used to evaluate lightness (L*), chroma (C*), color difference (ΔE00) after 6 month, and whiteness index for Dentistry (WID). Results: RCs formulated with TUs presented significantly higher CR, and fluorescence (with T_AR). Significantly lower C*, L*, and TP00 (except for P_AR and T_AL) were also observed in RCs containing TUs. ΔE00 were not significant among the materials. WID was not influenced. Conclusion: RCs composed by TU oligomers present higher CR and lower translucency. The material also present higher fluorescence depending on the oligomer used. Clinical Significance: The use of thio-urethanes to formulate resin cements can ensure a luting material with improved potential to mask colored substrates due to the higher contrast ratio and lower translucency obtained. A final higher fluorescence of restoration is also expected with the use of specific oligomer.

AB - Objective: The aim of this study was to evaluate the color parameters and optical properties of resin cements (RCs) formulated with thio-urethanes (TUs). Materials and methods: Six TUs were synthesized by combining thiols (pentaerythritol tetra-3-mercaptopropionate [PETMP] or trimethylol-tris-3-mercaptopropionate [TMP]) with di-functional isocyanates (1,6-Hexanediol-diissocyante [HDDI] [aliphatic-AL] or 1,3-bis(1-isocyanato-1-methylethyl) benzene [BDI] [aromatic-AR] or Dicyclohexylmethane 4,4′-Diisocyanate [HMDI] [cyclic-CC]). TUs (20 wt%) were added to a BisGMA/UDMA/TEGDMA matrix. Filler was introduced at 60 wt%. Fluorescence was evaluated through an UV-light emitting equipment. Coordinates L*, a*, and b* were obtained in the black and white reflectance to evaluate the contrast ratio (CR) and translucency parameter (TP00). The coordinates obtained from transmittance were used to evaluate lightness (L*), chroma (C*), color difference (ΔE00) after 6 month, and whiteness index for Dentistry (WID). Results: RCs formulated with TUs presented significantly higher CR, and fluorescence (with T_AR). Significantly lower C*, L*, and TP00 (except for P_AR and T_AL) were also observed in RCs containing TUs. ΔE00 were not significant among the materials. WID was not influenced. Conclusion: RCs composed by TU oligomers present higher CR and lower translucency. The material also present higher fluorescence depending on the oligomer used. Clinical Significance: The use of thio-urethanes to formulate resin cements can ensure a luting material with improved potential to mask colored substrates due to the higher contrast ratio and lower translucency obtained. A final higher fluorescence of restoration is also expected with the use of specific oligomer.

KW - colorimetric evaluation

KW - optical properties

KW - resin cements

KW - thio-urethane oligomers

UR - http://www.scopus.com/inward/record.url?scp=85056177282&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056177282&partnerID=8YFLogxK

U2 - 10.1111/jerd.12437

DO - 10.1111/jerd.12437

M3 - Article

C2 - 30394660

AN - SCOPUS:85056177282

JO - Journal of Esthetic and Restorative Dentistry

JF - Journal of Esthetic and Restorative Dentistry

SN - 1496-4155

ER -