Fourier-transform infrared spectroscopy/attenuated total reflectance analysis for the degree of conversion and shear bond strength of Transbond XT adhesive system

Masood, Taha Mohammed; Abbassy, Mona Aly; Bakry, Ahmed; Matar, Naof Yessen; Hassan, Ali

doi:10.2147/ccide.s169438

Cited by 8 publications

(5 citation statements)

References 19 publications

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“…25 In a recent study, Masood et al evaluated the DC for Transbond XT using variable curing durations with 1600 mW/cm 2 light intensity and aimed to determine the effect of the tested curing durations on shear bond strength of the material with ceramic brackets. 26 They found that 6- and 9-seconds curing showed significantly higher shear bond values and better DC when compared to the 3 seconds curing, whereas no significant difference was recorded between the 6- and 9-seconds curing. In this study, the authors concluded that in actual fact, while bonding the ceramic brackets, the irradiation should at least last 6 seconds instead of 3, as advised by the manufacturer.…”

Section: Discussionmentioning

confidence: 95%

Structural and mechanical analysis of three orthodontic adhesive composites cured with different light units

Yılmaz

Bakkal

Kurt

2020

Journal of Applied Biomaterials & Functional Materials

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Objective: To evaluate the effects of three different curing units on the physical and mechanical features of three different orthodontic adhesive resin materials. Material and Methods: 45 specimens (5 mm in diameter, and 2 mm in thickness) of each of the three different adhesive composite resin materials (Transbond XT, Grēngloo™ Adhesive and Light Bond Paste) were cured with three different light units (a polywave third generation (Valo), a monowave (DemiUltra), and a second-generation LED (Optima 10)). To quantify degree of conversion (DC), the Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy was used in transmission mode (ALPHA FT-IR Spectrometer, Bruker Optics, Germany). Vickers hardness value was recorded under constant load 100 g for 10 s with a microhardness tester (HMV M-1, Shimadzu Corp., Kyoto, Japan). The data were statistically analyzed using Kruskal-Wallis and chi-square tests. The level of significance was considered p < 0.05. Results: The highest DC values were obtained as a result of curing with Optima 10. This rate was followed by Demi Ultra and Valo, respectively. Transbond XT samples showed a lower level of conversion than the samples of Light Bond Paste and Grēngloo™ Adhesive. The top surfaces of each material showed higher hardness values than the bottom surfaces ( p < 0.05). The Light Bond Paste showed the highest hardness values both on the top and bottom surfaces among the three materials, followed by Grēngloo™ Adhesive. While the hardness values of the top surfaces of the samples cured with Demi Ultra and Valo light units were similar, higher hardness values are recorded with Valo on the bottom surfaces (Valo; 85.200/75.200 (top/bottom) versus Demi Ultra; 86.100/66.000 (top/bottom)). Conclusions: The different DC and the surface hardness properties were recorded for the resin as orthodontic adhesives depending on different light units. Shorter radiation time caused lower DC and surface hardness values.

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Section: Discussionmentioning

confidence: 95%

Structural and mechanical analysis of three orthodontic adhesive composites cured with different light units

Yılmaz

Bakkal

Kurt

2020

Journal of Applied Biomaterials & Functional Materials

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“…The %DC for a resin is defined as the extent to which carbon double bonds (C=C) of the monomer are converted into carbon single bonds (C–C), to form polymers during the polymerization reaction. 23, 24 The FTIR spectroscopy technique employed in this study to investigate the degree of conversion is an essential surface analytical method. The increase in the bond strength values obtained in the current study may be explained by the recorded FTIR spectroscopy values.…”

Section: Discussionmentioning

confidence: 99%

High-Intensity Light-Emitting Diode and Reduced Curing Times—An In Vitro Study

Saritha

Sunitha

Chanikya

et al. 2022

J Indian Orthod Soc

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Objective: To evaluate and compare the effect of high-intensity light-emitting diode (LED) light-curing unit at different curing times on the shear bond strength (SBS), surface enamel loss, and degree of polymerization of a light-cure and dual-cure adhesive system. Materials and Methods: One hundred and twenty extracted human premolar teeth were divided into 2 groups— group 1 (light cure) and group 2 (dual cure), depending on the adhesive system used. These groups were further subdivided into 3 subgroups with 20 teeth each, depending on the duration of curing. A high-intensity LED curing unit was used to bond metal brackets onto the teeth. The samples were tested on a universal testing machine to measure the SBS. The samples were then observed under a simple microscope and modified adhesive remnant index scores were assigned. The bracket bases were mapped with energy-dispersive X-ray spectrometry to evaluate the amount of enamel present. Cured adhesive was scraped and was subjected to Fourier-Transform Infrared Spectroscopy to assess the degree of cure (%DC). Results: An increase in curing durations increased mean SBS values, %DC, and calcium-phosphorous ratios (Ca:P). Similarly, these parameters were higher for dual-cure subgroups when compared to light-cure subgroups. Conclusion: High-intensity LEDs can be used successfully for bonding orthodontic brackets with reduced curing duration. These LEDs help to reduce chairside time and can minimize damage to enamel without compromising bond strength.

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“…The brackets in group MIPW had 3 μl of distilled water applied on top of the FTIR examination window using a microbrush [10]. All specimens were placed under a static load of 100 grams on the FTIR/-ATR examination window [15] as shown in Figure 2 (Thermo Scientific Nicolet iS5 FTIR Spectrometer; Thermo Fisher Scientific, Waltham, MA, USA).…”

Section: Attenuated Total Reflectance Fourier Transform Infrared Specmentioning

confidence: 99%

“…All FTIR/ATR measurements were obtained under the following conditions: a resolution of 4 cm −1 and four internal scans per reading [15]. The uncured resin in each group served as the control for the cured resin.…”

Section: Attenuated Total Reflectance Fourier Transform Infrared Specmentioning

confidence: 99%

“…The spectra of the monomers and their respective polymers were compared to determine the conversion rate of the double bonds into simple carbon bonds. The peaks were measured at the frequencies of 1,715/cm −1 (corresponding to the aromatic ring bonds) and 1,637/cm −1 (corresponding to the bonds between carbons of the methacrylate groups) [15]. The following formula was used to calculate the conversion rate of the double carbon bonds into simple bonds.…”

Section: Attenuated Total Reflectance Fourier Transform Infrared Specmentioning

confidence: 99%

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A Novel Evaluation Method for Detecting Defects of the Bonded Orthodontic Bracket‐Tooth Interface

Abbassy

Bakhsh

Bakry

2021

BioMed Research International

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Background. Orthodontic patients are at high risk to develop caries. This study is introducing a clinical method detecting interfacial defects between ceramic brackets and enamel utilizing optical coherent tomography in addition to using the nanoleakage expression in vitro test. Methods. Transbond XT primer and moisture insensitive primer (MIP) were bonded to 75 human premolar enamel surfaces and divided into (XTD), (MIPD), and (MIPW) groups. The (XTD) and (MIPD) groups had ceramic brackets bonded to dry enamel surfaces using TransBond and moisture insensitive primers, respectively, while the (MIPW) samples were bonded to moist enamel using moisture insensitive primer. All specimens were examined under crosspolarization optical coherence tomography. Debonding forces of the brackets to 45 teeth (15 teeth/group). 30 bonded specimens (15 specimens/group) were cross-sectioned to detect the nanoleakage expression using scanning electron microscope equipped with energy-dispersive spectroscopy (SEM/EDS). The degree of conversion of the specimens in the experimental groups was tested using attenuated total reflectance Fourier transform infrared spectroscopy (FTIR/ATR). Results. Optical coherence tomography detected the interfacial defects between the ceramic brackets and tooth structure. One way ANOVA showed that (XTD) and (MIPD) groups recorded significantly higher bond strength values and less nanoleakage expression when compared to MIPW ( p > 0.05 ). Conclusions. Optical coherence tomography can be utilized to detect interfacial adhesive-tooth defects. Dry enamel surfaces improve the quality of the enamel/primer interface (200 words).

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Fourier-transform infrared spectroscopy/attenuated total reflectance analysis for the degree of conversion and shear bond strength of Transbond XT adhesive system

Cited by 8 publications

References 19 publications

Structural and mechanical analysis of three orthodontic adhesive composites cured with different light units

Structural and mechanical analysis of three orthodontic adhesive composites cured with different light units

High-Intensity Light-Emitting Diode and Reduced Curing Times—An In Vitro Study

A Novel Evaluation Method for Detecting Defects of the Bonded Orthodontic Bracket‐Tooth Interface

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