Estimation of the shear bond strength and adhesive remnant index of orthodontic adhesives stored in static magnetic field

Salih Al Qassar, Sarmad S.; Ahmed, Mahmood KH.; Al-Mallah, Mahmood Rafea

doi:10.1080/27705781.2023.2265262

Clinical and Investigative Orthodontics

2023

DOI: 10.1080/27705781.2023.2265262

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Estimation of the shear bond strength and adhesive remnant index of orthodontic adhesives stored in static magnetic field

Sarmad S. Salih Al Qassar,

Mahmood KH. Ahmed,

Mahmood Rafea Al-Mallah

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2024

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Cited by 4 publications

References 26 publications

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Bond Integrity and Microleakage of Orthodontic Bands Cemented by Glass Ionomer Cements Stored in Static Magnetic Field

Al Qassar,

Alkhayat,

Al Mallah

2024

Journal of Advanced Oral Research

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Aim: Improving the band-tooth bond integrity by glass ionomer cement (GIC) is essential in orthodontic treatments. As, microleakage under bands induced enamel demineralization. Storing the dental material to updated magnets improved their mechanical properties. This research aimed to assess the microleakage of GIC after storing in a static magnetic field (SMF). Material and Methods: Forty premolars and their suitable bands were randomly classified into two main groups according to the types of GIC tested in this research; resin-modified GIC (RMGIC) and conventional GIC (CGIC). Each group was subdivided according to the exposure to SMF before polymerization into two subgroups. CGIC not exposed to SMF (CC), CGIC exposed to SMF (CM), RMGIC not exposed to SMF (LC) and RMGIC exposed to SMF (LM). SMF intensity performed was 0.225 Tesla, exposed for 48 hours at room temperature. The entire tube of RMGIC was inserted in SMF, where the powder of CGIC was stored in SMF. The microleakage under the band was evaluated under a 20× stereomicroscope by dye penetration technique at the cement band interface. Wilcoxon signed-rank test was used for data analysis, p ≤ .05. Results: The main (SD) microleakage of GIC reduced significantly ( p = .043) after being exposed to SMF from 3.1950 (0.632) mm to 1.7095 (0.1176) mm and from 0.8745 (0.1104) mm to 0.6430(0.094) mm for CGIC and RMGIC, respectively. Conclusion: Storing the CGIC powder in (0.225 T) SMF improves band-tooth bond integrity. Additionally, the preservation of RMGIC in SMF minimized the microleakage under orthodontic bands.

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Bond Integrity and Microleakage of Orthodontic Bands Cemented by Glass Ionomer Cements Stored in Static Magnetic Field

Al Qassar,

Alkhayat,

Al Mallah

2024

Journal of Advanced Oral Research

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Effects of precuring heating modalities on the shear bond strength and adhesive remnant index of orthodontic adhesive

Al-Qassar,

Ahmed,

Alsaleem

2024

Braz. J. Oral Sci.

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Aim: This study aimed to investigate precuring adhesive and bracket heating\cooling protocol on shear bond strength (SBS) and adhesive remnant index (ARI). Methods: 70 newly extracted lower premolars categorized randomly into 7 groups (n = 10 (ten teeth each)) according to adhesive and/or brackets temperatures. Pre-curing, the 3M Transbond PlusTM XT adhesive temperature was adjusted to 5, 22, 40, 70°C, while the brackets were stored at 5, 55°C before bonding. Also, adhesive and brackets were heated by tooth dryer before curing representing the seventh group. The samples were stored in deionized water for 24h at 37°C in dark incubator before debonding by universal testing machine. Analysis of variance (ANOVA) and post Hoc Tukey statistical tests were performed for SBS analysis, while Kruskal Wallis test analyzed ARI data (α=0.05). Results: Significant differences were found among the groups regarding SBS and ARI where p = 0.00, 0.024 respectively. SBS significantly increased when the adhesive temperature modified to 5°C and 70°C and brackets temperature adjusted to 5°C and 55°C. Also, heating the adhesive and brackets by tooth dryer generated peak SBS. While, heating the adhesive to 40°C declined SBS significantly. Conclusions: Lowering the temperature of the adhesive and/or brackets to 5°C and elevation their temperature above 55°C pre-curing has favorable effects on SBS. Storing the adhesive at 40°C before bonding showed reductions in SBS. Also, heating both the adhesive and brackets pre-curing formed all-out SBS with reduced ARI.

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Influence of different types of mouthwashes on force decay of elastomeric chain recommended in SARS-COV-2 pandemic

Salih Al Qassar,

Ismael,

Dewachi

2024

Journal of Orthodontic Science

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OBJECTIVES: This study aimed to compare the force decay of the power-chain elastics after exposure to anti-coronavirus 2019 (COVID-19) antiseptic mouthwashes at different intervals. METHODS: A total of 300 power-chain pieces were used from American Orthodontics (AO) and Dentaurum (D) brands. Each piece composed of five loops that were selected to simulate canine retraction distally. The samples were randomly grouped according to immersion in the tested mouthwashes 0.2% povidone-iodine (PVP-I), 1% hydrogen peroxide (H2O2), and 0.2% chlorhexidine (CHX) and cetylpyridinium chloride (CPC). The maximum tensile load failure testing (MTLT) was assessed at six time points (zero, one hour, 24 hours, 1, 2 and 4 weeks). Analysis of variance (ANOVA) and Tukey’s post hoc tests were used to analyse the data, where P < 0.05. RESULTS: Significant differences in MTLT of power-chain elastics used at different immersion intervals were observed. MTLT, in each tested group, decreased significantly as the immersion time increased with significant differences among the tested mouthwashes at each time point. H2O2 group displays a maximum force decay throughout the time intervals for both brands, in contrast to CPC group, which shows less degradation over time. CONCLUSION: Both brands are decade over time during exposure to the tested mouthwashes. CPC mouthwashes is a good option to be described for orthodontic patient during COVID-19 pandemic, whereas H2O2 mouthwashes should be avoided.

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Estimation of the shear bond strength and adhesive remnant index of orthodontic adhesives stored in static magnetic field

Cited by 4 publications

References 26 publications

Bond Integrity and Microleakage of Orthodontic Bands Cemented by Glass Ionomer Cements Stored in Static Magnetic Field

Bond Integrity and Microleakage of Orthodontic Bands Cemented by Glass Ionomer Cements Stored in Static Magnetic Field

Effects of precuring heating modalities on the shear bond strength and adhesive remnant index of orthodontic adhesive

Influence of different types of mouthwashes on force decay of elastomeric chain recommended in SARS-COV-2 pandemic

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