Determination of resin cure using infrared analysis without an internal standard

Frederick A. Rueggeberg

doi:10.1016/0109-5641(94)90076-0

Determination of resin cure using infrared analysis without an internal standard

Frederick A. Rueggeberg

Restorative Sciences

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

28 Scopus citations

Abstract

Objectives. The purpose of this study was to develop a methodology whereby the monomer conversion of dental restorative resins which contain no functional group acting as an internal standard can be easily using infrared spectroscopy. Methods. Calibration solutions of MMA were made from which the quantification of weight percent methacrylate groups (CH₂C(CH₃CO) termed (WPMG) could be determined using infrared spectroscopy. The extent of resin cure using the WPMG method consisted of calculating the changes in WPMG pre- and post-cure. The extent of cure of a commercial unfilled bonding resin was calculated using infrared methods utilizing the internal aromatic standard, and also by means of WPMG. Results. WPMG had an identical optical constant for a wide range of monomers: MMA, TEGDMA, EGDMA, HEMA. The extent of monomer conversion using both methods of analysis indicated statistically equivalent results: 75.2 ± 1.0% using an internal standard, and 76.0 ± 1.1% using WPMG. Significance. The methods developed in this study using infrared spectroscopic methods facilitate the determination of cure of dental resins which do not have functional groups to serve as internal standards.

Original language	English (US)
Pages (from-to)	282-286
Number of pages	5
Journal	Dental Materials
Volume	10
Issue number	4
DOIs	https://doi.org/10.1016/0109-5641(94)90076-0
State	Published - Jul 1994

ASJC Scopus subject areas

Materials Science(all)
Dentistry(all)
Mechanics of Materials

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title = "Determination of resin cure using infrared analysis without an internal standard",

abstract = "Objectives. The purpose of this study was to develop a methodology whereby the monomer conversion of dental restorative resins which contain no functional group acting as an internal standard can be easily using infrared spectroscopy. Methods. Calibration solutions of MMA were made from which the quantification of weight percent methacrylate groups (CH2C(CH3CO) termed (WPMG) could be determined using infrared spectroscopy. The extent of resin cure using the WPMG method consisted of calculating the changes in WPMG pre- and post-cure. The extent of cure of a commercial unfilled bonding resin was calculated using infrared methods utilizing the internal aromatic standard, and also by means of WPMG. Results. WPMG had an identical optical constant for a wide range of monomers: MMA, TEGDMA, EGDMA, HEMA. The extent of monomer conversion using both methods of analysis indicated statistically equivalent results: 75.2 ± 1.0% using an internal standard, and 76.0 ± 1.1% using WPMG. Significance. The methods developed in this study using infrared spectroscopic methods facilitate the determination of cure of dental resins which do not have functional groups to serve as internal standards.",

author = "Rueggeberg, {Frederick A.}",

note = "Funding Information: The author wishes to thank the Esschem Company for its generous supply of monomers. This research was funded by Research Grant DE09418 from the National Institute of Dental Research, Bethesda, MD 20892.",

year = "1994",

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doi = "10.1016/0109-5641(94)90076-0",

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AU - Rueggeberg, Frederick A.

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PY - 1994/7

Y1 - 1994/7

N2 - Objectives. The purpose of this study was to develop a methodology whereby the monomer conversion of dental restorative resins which contain no functional group acting as an internal standard can be easily using infrared spectroscopy. Methods. Calibration solutions of MMA were made from which the quantification of weight percent methacrylate groups (CH2C(CH3CO) termed (WPMG) could be determined using infrared spectroscopy. The extent of resin cure using the WPMG method consisted of calculating the changes in WPMG pre- and post-cure. The extent of cure of a commercial unfilled bonding resin was calculated using infrared methods utilizing the internal aromatic standard, and also by means of WPMG. Results. WPMG had an identical optical constant for a wide range of monomers: MMA, TEGDMA, EGDMA, HEMA. The extent of monomer conversion using both methods of analysis indicated statistically equivalent results: 75.2 ± 1.0% using an internal standard, and 76.0 ± 1.1% using WPMG. Significance. The methods developed in this study using infrared spectroscopic methods facilitate the determination of cure of dental resins which do not have functional groups to serve as internal standards.

AB - Objectives. The purpose of this study was to develop a methodology whereby the monomer conversion of dental restorative resins which contain no functional group acting as an internal standard can be easily using infrared spectroscopy. Methods. Calibration solutions of MMA were made from which the quantification of weight percent methacrylate groups (CH2C(CH3CO) termed (WPMG) could be determined using infrared spectroscopy. The extent of resin cure using the WPMG method consisted of calculating the changes in WPMG pre- and post-cure. The extent of cure of a commercial unfilled bonding resin was calculated using infrared methods utilizing the internal aromatic standard, and also by means of WPMG. Results. WPMG had an identical optical constant for a wide range of monomers: MMA, TEGDMA, EGDMA, HEMA. The extent of monomer conversion using both methods of analysis indicated statistically equivalent results: 75.2 ± 1.0% using an internal standard, and 76.0 ± 1.1% using WPMG. Significance. The methods developed in this study using infrared spectroscopic methods facilitate the determination of cure of dental resins which do not have functional groups to serve as internal standards.

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Determination of resin cure using infrared analysis without an internal standard

Abstract

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