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Method for representing visible light solidifying performance of resin and adhesive for tooth material

A technology of dental materials and adhesives, applied in dental preparations, analytical materials, material inspection products, etc., can solve problems such as large data errors

Inactive Publication Date: 2008-06-18
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in the two characterization methods for the curing performance of dental materials. For example, the curing performance is studied by performing double bond correlation peaks in the near-infrared spectrum (NIR) on dental materials with different exposure times. The induction period, curing time, curing degree and curing rate can be quantitatively studied, but due to the different areas of each measurement, the data error is relatively large; the online hardness measurement method can only indirectly quantitatively characterize the curing degree and curing rate

Method used

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  • Method for representing visible light solidifying performance of resin and adhesive for tooth material
  • Method for representing visible light solidifying performance of resin and adhesive for tooth material
  • Method for representing visible light solidifying performance of resin and adhesive for tooth material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add white solid 4-META (4-ethoxy trimellitic anhydride) to liquid reactive diluent TEGDMA (triethylene glycol dimethacrylate) and matrix resin Bis-GMA (bisphenol A glycidyl methacrylate) ester) and stir evenly to obtain a binder mixture with a volume ratio of the three of 1:3:6.

[0042] The adhesive is placed between two slides and placed in an infrared in situ cell at room temperature. Fix the visible light source, carry out continuous visible light curing on the adhesive, and conduct an online infrared test on the whole process, and obtain a series of infrared spectra. Figure 1 is the infrared spectra measured at the beginning of curing and the end of curing.

[0043] 6165cm in the infrared spectrum measured at different curing times -1 The peak area of ​​the absorption peak is quantitatively analyzed and plotted (Fig. 2). Through Fig. 2, it can be calculated that the curing degree of the 4-META binder under visible light curing conditions is 56.91%. The specific m...

Embodiment 2

[0046] The liquid reactive diluent TEGDMA and the matrix resin Bis-GMA were stirred evenly to prepare a mixture with a volume ratio of 4:6.

[0047] The mixture was placed between two slides in an infrared in situ cell at room temperature. The visible light source is fixed and the adhesive is continuously cured by visible light, and the online infrared test is carried out for the whole process, and a series of infrared spectra are obtained. Fig. 4 is the infrared spectrogram measured at the beginning of curing and the end of curing.

[0048] 6165cm in the infrared spectrum measured at different curing times -1 The peak area of ​​the absorption peak is quantitatively analyzed and plotted (Fig. 5), and the degree of curing of the diluent TEGDMA and matrix resin Bis-GMA mixture under visible light curing conditions can be calculated to be 67.19%, and the specific calculation method is the same as in the embodiment 1; In addition, it can also be inferred that the curing inductio...

Embodiment 3

[0051] Add the white solid PMDM (ethoxy pyromellitate dimethacrylate) into the liquid reactive diluent TEGDMA and the matrix resin Bis-GMA and stir evenly to obtain a bond with a volume ratio of 1:3:6. agent mixture.

[0052] The adhesive is placed between two slides and placed in an infrared in situ cell at room temperature. The visible light source is fixed and the adhesive is continuously cured by visible light, and the online infrared test is carried out for the whole process, and a series of infrared spectra are obtained. Fig. 7 is the infrared spectrogram measured at the beginning of curing and the end of curing.

[0053] 6165cm in the infrared spectrum measured at different curing times -1 The peak area of ​​the absorption peak is quantitatively analyzed and plotted (Fig. 8), and the degree of curing of the PMDM adhesive under visible light curing conditions can be calculated to be 55.73% by Fig. 8; The curing induction period under the experimental curing conditions...

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Abstract

The invention belongs to the technical field of characterization of a biomedical used high molecular material, in particular to a method to characterize the visible light curing performance of dental-used resin and agglomerant. The invention makes use of the two-dimensional infrared spectrum technology to determine the curing performance of the material in a curing mode; and a series of spectral lines are got; the spectral lines can detect such performance parameters as the curing induction period, the curing time, the state of cure, the curing rate and so on during the curing process of the material, and can determine the conversion speed of various monomers and the double bonds of the monomers. The invention is applicable for dental resin or agglomerant of different curing modes, and has extensive applicable prospect in the field of research of the mechanism of dental polymeric material, development of new materials and so on. In addition, the testing process is simple. Accordingly,the invention has important promotion and application values.

Description

technical field [0001] The invention belongs to the technical field of characterization of biomedical polymer materials, and in particular relates to a method for characterizing the visible light curing properties of resins and adhesives used in dental materials by using two-dimensional infrared spectroscopy. Background technique [0002] Since the chemist Noda proposed the concept of generalized two-dimensional infrared correlation spectroscopy in 1993, research in this field has been very active at home and abroad. By combining high-precision Fourier transform infrared spectroscopy with two-dimensional spectral correlation analysis, people can make effective estimates of the effects of external disturbances such as light, temperature, pressure, and concentration on functional group movement, intramolecular and intermolecular interactions, etc. Research. Expanding the traditional one-dimensional infrared spectrum in two dimensions can improve the resolution of the spectrum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/44G01N33/00G01N21/27A61K6/08A61K6/884
Inventor 孙冰洁武培怡李为金秋谭莉莎
Owner FUDAN UNIV
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