Evaluation of new coinitiators of camphorquinone useful in the radical photopolymerization of dental monomers

Pérez‐Mondragón, Alma Antonia; Cuevas‐Suárez, Carlos Enrique; González-López, José Abraham; Trejo‐Carbajal, Nayely; Herrera‐González, Ana M.

doi:10.1016/j.jphotochem.2020.112844

Cited by 25 publications

(16 citation statements)

References 29 publications

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“…However, a large amount of filler (up to 70%) limits the depth of light penetration Photoinduced radical polymerization of various monomers has been gaining more and more interest in various industries in recent decades [6,32]. Many of the developed photoinitiating systems meet the requirements for specific applications in the technology of protective coatings [33][34][35], graphics industry [36], microelectronics [37], optical disc production [38], holography [39][40][41], stereolithography [42][43][44] and medicine [45][46][47][48][49][50][51]. Photopolymerization has also become an integral part of dental practice [52].…”

Section: Of 22mentioning

confidence: 99%

Acenaphthoquinoxaline Derivatives as Dental Photoinitiators of Acrylates Polymerization

Pyszka

Jędrzejewska

2021

Materials

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A series of dyes based on the acenaphthoquinoxaline skeleton was synthesized. Their structure was modified by introducing electron-withdrawing and electron-donating groups, increasing the number of conjugated double bonds and the number and position of nitrogen atoms, as well as the arrangement of aromatic rings (linear or angular). The dyes were investigated as a component in the photoinitiating systems of radical polymerization for a potential application in dentistry. They acted as the primary absorber of visible light and the acceptor of an electron, which was generated from a second component being an electron donor. Thus, the radicals were generated by the photoinduced intermolecular electron transfer (PET) process. Electron donors used differed in the type of heteroatom, i.e., O, S and N and the number and position of methoxy substituents. To test the ability to initiate the polymerization reaction by photoinduced hydrogen atom transfer, we used 2-mercaptobenzoxazole as a co-initiator. The effectiveness of the photoinitiating systems clearly depends on both the modified acenaphthoquinocaline structure and the type of co-initiator. The lower amount of heat released during the chain reaction and the polymerization rate comparable to this achieved for the photoinitiator traditionally used in dentistry (camphorquinone) indicates that the studied dyes may be valuable in this field.

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Section: Of 22mentioning

confidence: 99%

Acenaphthoquinoxaline Derivatives as Dental Photoinitiators of Acrylates Polymerization

Pyszka

Jędrzejewska

2021

Materials

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“…TEGDMA is mostly used for this purpose. The viscosity level from the highest to lowest is ranked as Bis − GMA ð1369 Pa sÞ > UDMA ð28 Pa s Þ > TEGDMA ð0:05 Pa sÞ [25]. Moreover, TEGDMA is used to improve filler connections, too [26].…”

mentioning

confidence: 99%

Effect of Polymerization Time on Residual Monomer Release in Dental Composite: In Vitro Study

Sonkaya

Kürklü

Bakır

2021

International Journal of Polymer Science

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Light activated resin-based composites are the most accepted and used materials among clinicians. The aim of this study is to determine the amount of residual monomer released from nanofiller composite resins for different polymerization times and storage periods in vitro. To this purpose, Tetric Ceram (Ivoclar, Liechtenstein), Clearfil Majesty Posterior (Kuraray, Japan), Grandio (VOCO, Germany), and Filtek Ultimate Universal (3M, USA) were used as nanofiller resin composites samples. Four groups ( n = 40 , diameter: 5 mm, thickness: 2 mm) of each material were fabricated, and each group was exposed to three different polymerization time (10, 20 and 40 sec). High-performance liquid chromatography (HPLC) was used to measure the amount of monomers released over 1, 15, and 30 days. The highest amount of monomer release was seen in Tetric EvoCream composite, while the least monomer release was seen in Clearfil Majesty composite. Regardless of the polymerization time, material, or storage period, the highest amount of eluted monomer was Bis-GMA. It is observed that there is no statistically significant difference between various polymerization times. Monomer release reached its highest level on the 15th day and decreased on the 30th day for all composites. Polymerization time did not affect the monomer release from the composites, but the type of the monomers and concentration of the filler used in the composites affected the amount of released monomers. The use of TEGDMA (co)monomer reduced the monomer release.

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“…The FT-IR technique was used for the structural characterization of dental materials such as: implant materials [ 82 ], biopolymers [ 83 ], ceramics [ 84 ], resin nanocomposites [ 85 ], implant coatings [ 86 , 87 , 88 ], bioceramics [ 89 ], resins [ 90 , 91 , 92 , 93 , 94 ], cements [ 95 ], bioglass [ 96 ], and self-curing materials [ 97 ].…”

Section: Infrared Spectroscopy (Ir) and Fourier Transform Infrared Spectroscopy (Ft-ir)mentioning

confidence: 99%

“…UV-Vis spectroscopy has been applied to study fillers for dental adhesive resins [ 123 ], to assess the risk of chemical irritation, allergic reactions and oral hypersensitivity due to the elution of polymers [ 124 ], to evaluate new co-initiators useful in the radical photopolymerization of dental polymers [ 94 , 125 ]. This technique was also used to characterize the colour and spectral reflectance and thickness oxide layer [ 126 ] and resin [ 127 ], to evaluate the transparency of ceramics [ 128 , 129 ], and to assesses the degradation rate of CH-based scaffolds which play a key role in endodontic regeneration periodontal regeneration material [ 130 ].…”

Section: Ultraviolet and Visible Spectroscopy (Uv-vis)mentioning

confidence: 99%

“…This absorption band at 445 nm gives to CQ the ability to be used as photoinitiator in the visible region, allowing to form an excited state and the subsequent hydrogen abstraction from the coinitiator. Finally, in the case of EDAB, MBTTA and MBTTM used as hydrogen donors, they show only absorption bands in the ultraviolet region, with high extinction coefficient values [ 94 ].…”

Section: Ultraviolet and Visible Spectroscopy (Uv-vis)mentioning

confidence: 99%

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Selected Spectroscopic Techniques for Surface Analysis of Dental Materials: A Narrative Review

et al. 2021

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The presented work focuses on the application of spectroscopic methods, such as Infrared Spectroscopy (IR), Fourier Transform Infrared Spectroscopy (FT-IR), Raman spectroscopy, Ultraviolet and Visible Spectroscopy (UV-Vis), X-ray spectroscopy, and Mass Spectrometry (MS), which are widely employed in the investigation of the surface properties of dental materials. Examples of the research of materials used as tooth fillings, surface preparation in dental prosthetics, cavity preparation methods and fractographic studies of dental implants are also presented. The cited studies show that the above techniques can be valuable tools as they are expanding the research capabilities of materials used in dentistry.

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Evaluation of new coinitiators of camphorquinone useful in the radical photopolymerization of dental monomers

Cited by 25 publications

References 29 publications

Acenaphthoquinoxaline Derivatives as Dental Photoinitiators of Acrylates Polymerization

Acenaphthoquinoxaline Derivatives as Dental Photoinitiators of Acrylates Polymerization

Effect of Polymerization Time on Residual Monomer Release in Dental Composite: In Vitro Study

Selected Spectroscopic Techniques for Surface Analysis of Dental Materials: A Narrative Review

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