Publication
Modelling ATR-FTIR spectra of dental bonding systems to investigate composition and polymerisation kinetics
| datacite.subject.fos | Ciências Médicas | |
| datacite.subject.sdg | 03:Saúde de Qualidade | |
| dc.contributor.author | Delgado, António H. S. | |
| dc.contributor.author | Young, Anne M. | |
| dc.date.accessioned | 2025-10-08T14:43:26Z | |
| dc.date.available | 2025-10-08T14:43:26Z | |
| dc.date.issued | 2021-02 | |
| dc.description.abstract | Component ratios and kinetics are key to understanding and optimising novel formulations. This warrants investigation of valid methods. Attenuated Total Reflectance Fourier Transform Infra-Red (ATR)-FTIR spectra of separate primers/adhesives were modelled using summed spectra of solvents (water, ethanol), methacrylate monomers (HEMA (hydroxyethyl methacrylate), Bis-GMA (bisphenol A glycidyl methacrylate), and 10-MDP (10-methacryloyloxydecyl dihydrogen phosphate)), and fillers, multiplied by varying fractions. Filler loads were obtained following their separation from the adhesives, by analysing three repetitions (n = 3). Spectral changes during light exposure at 37 °C (20 s, LED 1100–1330 mW/cm2) were used to determine polymerisation kinetics (n = 3). Independent samples T-test was used for statistical analysis (significance level of 5%). FTIR modelling suggested a primer solvent percentage of OBFL (Optibond FL) (30%) was half that of CFSE (Clearfil SE 2) (60%). OBFL included ethanol and water, while CFSE included only water. Monomer peaks were largely those of HEMA with lower levels of phosphate monomers. OBFL/CFSE adhesive model spectra suggested that both contained equal volumes of Bis-GMA/HEMA, with CFSE having 10-MDP. Filler levels and spectra from OBFL (48 wt.%) and CFSE (5 wt.%) were different. Both systems reached a 50% conversion rate within seconds of light exposure. The final conversion for OBFL (74 ± 1%) was lower compared to CFSE (79 ± 2%) (p < 0.05). ATR-FTIR is a useful method to investigate relative levels of main components in bonding systems and their polymerisation kinetics. Such information is valuable to understanding such behaviour. | eng |
| dc.identifier.citation | Delgado AH, Young AM. Modelling ATR-FTIR Spectra of Dental Bonding Systems to Investigate Composition and Polymerisation Kinetics. Materials. 2021; 14(4):760. https://doi.org/10.3390/ma14040760 | |
| dc.identifier.doi | 10.3390/ma14040760 | |
| dc.identifier.issn | 1996-1944 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/58974 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | MDPI | |
| dc.relation.hasversion | https://doi.org/10.3390/ma14040760 | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | dental adhesives | |
| dc.subject | FTIR | |
| dc.subject | infra-red spectroscopy | |
| dc.subject | photopolymerisation | |
| dc.subject | prediction model | |
| dc.title | Modelling ATR-FTIR spectra of dental bonding systems to investigate composition and polymerisation kinetics | eng |
| dc.type | contribution to journal | |
| dspace.entity.type | Publication | |
| oaire.citation.issue | 4 | |
| oaire.citation.startPage | 760 | |
| oaire.citation.title | Materials | |
| oaire.citation.volume | 14 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 |