Functionalized pink Al2O3

Mn pigments applied in prosthetic dentistry

Mário Thadeo R. Cruzeiro, Fernando A. Moraes, Marina R. Kaizer, Mário Lúcio Moreira, Yu Zhang, Rafael R. Moraes, Sergio S. Cava

Research output: Contribution to journalArticle

Abstract

Statement of problem: The color of dental poly(methyl methacrylate) (PMMA) is conventionally rendered by organic and inorganic pigments, which are usually not bonded to the polymer network. Functionalized ceramic pigments can be used to color PMMA, allowing improved chemical interaction with the resin matrix. Purpose: The purpose of this in vitro study was to synthesize, functionalize, and characterize pink manganese-doped alumina ceramic pigments. The hypothesis tested was that functionalized ceramic pigments would render pink coloration to a translucent PMMA without jeopardizing its mechanical properties. Material and methods: Pink alumina powders doped with 1 or 2 mol% of manganese (Al2O3:Mn) were prepared by means of a polymeric precursor method. Pigment (Pig.) particles were functionalized with a silica coating method followed by silanation before preparation of PMMA-based composite resins (5 wt% pigment). The color of composite resins (Pig.1% and Pig.2%) and PMMA controls (Pink and translucent [Trans]) was evaluated (CIELab color coordinates), and their mechanical properties were tested (3-point bending). Results: The microstructure of the pigment particles showed approximately 55-nm nanocrystals of manganese-doped α-alumina clustered into irregular porous particles up to 60 μm. The composite resins and pink PMMA showed similar color parameters (CIE a* pink=20.1, Pig.1%=14.6, Pig.2%=16.0, Trans=0.19, P<.001; CIE b* Pink=17.0, Pig.1%=18.6, Pig.2%=19.0, Trans=2.52, P<.001). No statistical differences were observed in mechanical properties among groups (σf pink=98.4, Pig.1%=98.1, Pig.2%=98.8, trans=89.1, P=.136). Conclusions: The addition of the functionalized pink ceramic pigments to a translucent PMMA yielded similar coloration to that of the regular pink PMMA used in dentistry and did not jeopardize its mechanical properties.

Original languageEnglish (US)
JournalJournal of Prosthetic Dentistry
DOIs
StateAccepted/In press - 2017

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Prosthodontics
Polymethyl Methacrylate
Color
Aluminum Oxide
Composite Resins
Ceramics
Manganese
Coloring Agents
Dentistry
Silicon Dioxide
Powders
Nanoparticles
Tooth
Polymers

ASJC Scopus subject areas

  • Oral Surgery

Cite this

Cruzeiro, M. T. R., Moraes, F. A., Kaizer, M. R., Moreira, M. L., Zhang, Y., Moraes, R. R., & Cava, S. S. (Accepted/In press). Functionalized pink Al2O3: Mn pigments applied in prosthetic dentistry. Journal of Prosthetic Dentistry. https://doi.org/10.1016/j.prosdent.2016.12.011

Functionalized pink Al2O3 : Mn pigments applied in prosthetic dentistry. / Cruzeiro, Mário Thadeo R.; Moraes, Fernando A.; Kaizer, Marina R.; Moreira, Mário Lúcio; Zhang, Yu; Moraes, Rafael R.; Cava, Sergio S.

In: Journal of Prosthetic Dentistry, 2017.

Research output: Contribution to journalArticle

Cruzeiro, Mário Thadeo R. ; Moraes, Fernando A. ; Kaizer, Marina R. ; Moreira, Mário Lúcio ; Zhang, Yu ; Moraes, Rafael R. ; Cava, Sergio S. / Functionalized pink Al2O3 : Mn pigments applied in prosthetic dentistry. In: Journal of Prosthetic Dentistry. 2017.
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title = "Functionalized pink Al2O3: Mn pigments applied in prosthetic dentistry",
abstract = "Statement of problem: The color of dental poly(methyl methacrylate) (PMMA) is conventionally rendered by organic and inorganic pigments, which are usually not bonded to the polymer network. Functionalized ceramic pigments can be used to color PMMA, allowing improved chemical interaction with the resin matrix. Purpose: The purpose of this in vitro study was to synthesize, functionalize, and characterize pink manganese-doped alumina ceramic pigments. The hypothesis tested was that functionalized ceramic pigments would render pink coloration to a translucent PMMA without jeopardizing its mechanical properties. Material and methods: Pink alumina powders doped with 1 or 2 mol{\%} of manganese (Al2O3:Mn) were prepared by means of a polymeric precursor method. Pigment (Pig.) particles were functionalized with a silica coating method followed by silanation before preparation of PMMA-based composite resins (5 wt{\%} pigment). The color of composite resins (Pig.1{\%} and Pig.2{\%}) and PMMA controls (Pink and translucent [Trans]) was evaluated (CIELab color coordinates), and their mechanical properties were tested (3-point bending). Results: The microstructure of the pigment particles showed approximately 55-nm nanocrystals of manganese-doped α-alumina clustered into irregular porous particles up to 60 μm. The composite resins and pink PMMA showed similar color parameters (CIE a* pink=20.1, Pig.1{\%}=14.6, Pig.2{\%}=16.0, Trans=0.19, P<.001; CIE b* Pink=17.0, Pig.1{\%}=18.6, Pig.2{\%}=19.0, Trans=2.52, P<.001). No statistical differences were observed in mechanical properties among groups (σf pink=98.4, Pig.1{\%}=98.1, Pig.2{\%}=98.8, trans=89.1, P=.136). Conclusions: The addition of the functionalized pink ceramic pigments to a translucent PMMA yielded similar coloration to that of the regular pink PMMA used in dentistry and did not jeopardize its mechanical properties.",
author = "Cruzeiro, {M{\'a}rio Thadeo R.} and Moraes, {Fernando A.} and Kaizer, {Marina R.} and Moreira, {M{\'a}rio L{\'u}cio} and Yu Zhang and Moraes, {Rafael R.} and Cava, {Sergio S.}",
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T1 - Functionalized pink Al2O3

T2 - Mn pigments applied in prosthetic dentistry

AU - Cruzeiro, Mário Thadeo R.

AU - Moraes, Fernando A.

AU - Kaizer, Marina R.

AU - Moreira, Mário Lúcio

AU - Zhang, Yu

AU - Moraes, Rafael R.

AU - Cava, Sergio S.

PY - 2017

Y1 - 2017

N2 - Statement of problem: The color of dental poly(methyl methacrylate) (PMMA) is conventionally rendered by organic and inorganic pigments, which are usually not bonded to the polymer network. Functionalized ceramic pigments can be used to color PMMA, allowing improved chemical interaction with the resin matrix. Purpose: The purpose of this in vitro study was to synthesize, functionalize, and characterize pink manganese-doped alumina ceramic pigments. The hypothesis tested was that functionalized ceramic pigments would render pink coloration to a translucent PMMA without jeopardizing its mechanical properties. Material and methods: Pink alumina powders doped with 1 or 2 mol% of manganese (Al2O3:Mn) were prepared by means of a polymeric precursor method. Pigment (Pig.) particles were functionalized with a silica coating method followed by silanation before preparation of PMMA-based composite resins (5 wt% pigment). The color of composite resins (Pig.1% and Pig.2%) and PMMA controls (Pink and translucent [Trans]) was evaluated (CIELab color coordinates), and their mechanical properties were tested (3-point bending). Results: The microstructure of the pigment particles showed approximately 55-nm nanocrystals of manganese-doped α-alumina clustered into irregular porous particles up to 60 μm. The composite resins and pink PMMA showed similar color parameters (CIE a* pink=20.1, Pig.1%=14.6, Pig.2%=16.0, Trans=0.19, P<.001; CIE b* Pink=17.0, Pig.1%=18.6, Pig.2%=19.0, Trans=2.52, P<.001). No statistical differences were observed in mechanical properties among groups (σf pink=98.4, Pig.1%=98.1, Pig.2%=98.8, trans=89.1, P=.136). Conclusions: The addition of the functionalized pink ceramic pigments to a translucent PMMA yielded similar coloration to that of the regular pink PMMA used in dentistry and did not jeopardize its mechanical properties.

AB - Statement of problem: The color of dental poly(methyl methacrylate) (PMMA) is conventionally rendered by organic and inorganic pigments, which are usually not bonded to the polymer network. Functionalized ceramic pigments can be used to color PMMA, allowing improved chemical interaction with the resin matrix. Purpose: The purpose of this in vitro study was to synthesize, functionalize, and characterize pink manganese-doped alumina ceramic pigments. The hypothesis tested was that functionalized ceramic pigments would render pink coloration to a translucent PMMA without jeopardizing its mechanical properties. Material and methods: Pink alumina powders doped with 1 or 2 mol% of manganese (Al2O3:Mn) were prepared by means of a polymeric precursor method. Pigment (Pig.) particles were functionalized with a silica coating method followed by silanation before preparation of PMMA-based composite resins (5 wt% pigment). The color of composite resins (Pig.1% and Pig.2%) and PMMA controls (Pink and translucent [Trans]) was evaluated (CIELab color coordinates), and their mechanical properties were tested (3-point bending). Results: The microstructure of the pigment particles showed approximately 55-nm nanocrystals of manganese-doped α-alumina clustered into irregular porous particles up to 60 μm. The composite resins and pink PMMA showed similar color parameters (CIE a* pink=20.1, Pig.1%=14.6, Pig.2%=16.0, Trans=0.19, P<.001; CIE b* Pink=17.0, Pig.1%=18.6, Pig.2%=19.0, Trans=2.52, P<.001). No statistical differences were observed in mechanical properties among groups (σf pink=98.4, Pig.1%=98.1, Pig.2%=98.8, trans=89.1, P=.136). Conclusions: The addition of the functionalized pink ceramic pigments to a translucent PMMA yielded similar coloration to that of the regular pink PMMA used in dentistry and did not jeopardize its mechanical properties.

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