Applicability of the Real-Time FT-IR technique to determine the degree of conversion of dental compositions
Authors:
- Monika Topa,
- Joanna Ortyl
Abstract
Photopolymerization is an environmentally-friendly, non-destructive, safe and solvent-free method. Moreover it guarantees low energy consumption. Therefore the photopolymerization is used in many scientific disciplines, including dentistry for production photocurable dental materials. The use of photochemically initiated polymerization to obtain dental composites enables the use of unique and innovative features of this method. The most important are: short curing time of the composition (up to a few seconds); carrying out the reaction at room temperature; low energy consumption, spatial resolution (polymerization only in the exposed areas). Nevertheless, many different factors, such as the selection of appropriate monomers, initiators, inorganic fillers, curing time, type of radiation and light power, influence the quality of the composite obtained [1-2]. In this work, influence of different factors on properties of standard dental light-cure composite resins were studied. The effect of the concentration of amines as co-initiators on the final conversion of dental composites was investigated. Studies were also carried out on the effect of the weight ratio of the two standard monomers: Bisphenol A-glycidyl methacrylate (BisGMA) and triethylene glycol dimethacrylate (TEGDMA) used in the production of dental fillings. Finally, studies on the effect of the type of amines such as ethyl 4-(dimethylamino) benzoate (EDB), bis(hydroxyethyl) methylamine (MDA), 2-(phenylamino) acetic acid (NPG), triethanoloamine (ETA) and triethylamine (EThA) on the properties of final dental fillings (Figure 1) were investigated. To determine the conversion rate of monomers, the Real-time Fourier transform (real time-FTIR) method was used. The equipment was composed of the Thermo Scientific i10 NicoletTM spectrometer with an appropriate horizontal adapter adjusted for real time measurements of photopolymerization processes of samples with a thickness of 1.4 mm. It was then shown that the best composite consists of: CQ / EDB (in molar ratio 1: 2); BisGMA / TEGDMA (in weight ratio 7: 3).
- Record ID
- CUTa2468ef7d613401d99037c5953829271
- Publication categories
- ; ;
- Author
- Pages
- 77
- Other elements of collation
- wykr.
- Substantive notes
- Bibliogr. w przypisach
- Publ. w sekcji 1.5. Emerging Techniques
- Miejsce wyd. wg miejsca konf.
- Book
- 11th International Conference on Advanced Vibrational Spectroscopy, 23rd-26th August 2021 : online : abstract book, 2021, Kraków, [s.n.]
- Keywords in English
- photopolymerization, Real-Time FTIR technique, photocurable dental resins, photoinitiator
- URL
- https://icavs.org/gb/program/webinars-of-companies.html Opening in a new tab
- Related project
- Opracowanie i ocena właściwości fizykochemicznych i mechanicznych nowych fotoutwardzalnych w świetle widzialnym kompozytów polimerowych charakteryzujących się redukcją skurczu polimeryzacyjnego. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 0
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTa2468ef7d613401d99037c5953829271/
- URN
urn:pkr-prod:CUTa2468ef7d613401d99037c5953829271
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.