Calibration of FTIR conversion analysis of contemporary dental resin composites

F. A. Rueggeberg; D. T. Hashinger; C. W. Fairhurst

doi:10.1016/S0109-5641(05)80005-3

Calibration of FTIR conversion analysis of contemporary dental resin composites

F. A. Rueggeberg, D. T. Hashinger, C. W. Fairhurst

Restorative Sciences

Research output: Contribution to journal › Article › peer-review

257 Scopus citations

Abstract

Composite restorative material has undergone gradual change in composition since its introduction in the 1960's. Early commercial resins were mixtures of BIS-GMA and TEGDMA. Today, these mixtures are still present, but urethane dimethacrylates and large oligomeric structures of BIS-GMA-urethanes exist. Because of these changes in composition, the past methods of calculating monomer conversion by means of infrared spectroscopy may need modification. This research investigates different methods used to formulate calibration curves for determination of monomer conversion by infrared spectroscopy of contemporary commercial composites containing aromatic structures. Conversion calibration procedures using various baseline methods with BIS-GMA, Bisphenol-A/TEGDMA, and a hydrogenated bonding resin were established. Both peak and area infrared absorptions were determined. One particular baseline method proved the best fit to the Beer-Lambert law. Bisphenol-A was found unsuitable as an infrared calibration model for resin composites. The BIS-GMA/TEGDMA calibration model closely simulates conversion values obtained when a hydrogenated commercial resin model was used.

Original language	English (US)
Pages (from-to)	241-249
Number of pages	9
Journal	Dental Materials
Volume	6
Issue number	4
DOIs	https://doi.org/10.1016/S0109-5641(05)80005-3
State	Published - Oct 1990

ASJC Scopus subject areas

General Materials Science
General Dentistry
Mechanics of Materials

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title = "Calibration of FTIR conversion analysis of contemporary dental resin composites",

abstract = "Composite restorative material has undergone gradual change in composition since its introduction in the 1960's. Early commercial resins were mixtures of BIS-GMA and TEGDMA. Today, these mixtures are still present, but urethane dimethacrylates and large oligomeric structures of BIS-GMA-urethanes exist. Because of these changes in composition, the past methods of calculating monomer conversion by means of infrared spectroscopy may need modification. This research investigates different methods used to formulate calibration curves for determination of monomer conversion by infrared spectroscopy of contemporary commercial composites containing aromatic structures. Conversion calibration procedures using various baseline methods with BIS-GMA, Bisphenol-A/TEGDMA, and a hydrogenated bonding resin were established. Both peak and area infrared absorptions were determined. One particular baseline method proved the best fit to the Beer-Lambert law. Bisphenol-A was found unsuitable as an infrared calibration model for resin composites. The BIS-GMA/TEGDMA calibration model closely simulates conversion values obtained when a hydrogenated commercial resin model was used.",

author = "Rueggeberg, {F. A.} and Hashinger, {D. T.} and Fairhurst, {C. W.}",

note = "Funding Information: The authors wish to express their gratitude to Dr. Jeffrey Stansbury at the National Institute of Stan dards and Technology for his work in hydrogenating the commercial bonding resin. The talents of Dr. Geoffrey King and Mr. Edward Parry at the Medical College of Georgia are greatly appreciated for their assistance in constructing a micro-liquid analyzer for ATR. Dr. Eikichi Malta is thanked for his translation of Japanese references, and Mr. Harry Davis is acknowledged for his assistance in statistical analysis. This work was supported by a grant from the Medical College of Georgia Research Institute.",

year = "1990",

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doi = "10.1016/S0109-5641(05)80005-3",

language = "English (US)",

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pages = "241--249",

journal = "Dental Materials",

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AU - Hashinger, D. T.

AU - Fairhurst, C. W.

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PY - 1990/10

Y1 - 1990/10

N2 - Composite restorative material has undergone gradual change in composition since its introduction in the 1960's. Early commercial resins were mixtures of BIS-GMA and TEGDMA. Today, these mixtures are still present, but urethane dimethacrylates and large oligomeric structures of BIS-GMA-urethanes exist. Because of these changes in composition, the past methods of calculating monomer conversion by means of infrared spectroscopy may need modification. This research investigates different methods used to formulate calibration curves for determination of monomer conversion by infrared spectroscopy of contemporary commercial composites containing aromatic structures. Conversion calibration procedures using various baseline methods with BIS-GMA, Bisphenol-A/TEGDMA, and a hydrogenated bonding resin were established. Both peak and area infrared absorptions were determined. One particular baseline method proved the best fit to the Beer-Lambert law. Bisphenol-A was found unsuitable as an infrared calibration model for resin composites. The BIS-GMA/TEGDMA calibration model closely simulates conversion values obtained when a hydrogenated commercial resin model was used.

AB - Composite restorative material has undergone gradual change in composition since its introduction in the 1960's. Early commercial resins were mixtures of BIS-GMA and TEGDMA. Today, these mixtures are still present, but urethane dimethacrylates and large oligomeric structures of BIS-GMA-urethanes exist. Because of these changes in composition, the past methods of calculating monomer conversion by means of infrared spectroscopy may need modification. This research investigates different methods used to formulate calibration curves for determination of monomer conversion by infrared spectroscopy of contemporary commercial composites containing aromatic structures. Conversion calibration procedures using various baseline methods with BIS-GMA, Bisphenol-A/TEGDMA, and a hydrogenated bonding resin were established. Both peak and area infrared absorptions were determined. One particular baseline method proved the best fit to the Beer-Lambert law. Bisphenol-A was found unsuitable as an infrared calibration model for resin composites. The BIS-GMA/TEGDMA calibration model closely simulates conversion values obtained when a hydrogenated commercial resin model was used.

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Calibration of FTIR conversion analysis of contemporary dental resin composites

Abstract

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