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27 results on '"Al-Ahdal, Khold"'

5. An evaluation of handling and physico-mechanical properties of resin-composite materials

Author

Al-Ahdal, Khold Yahya and Silikas, Nikolaos

Subjects
617.6, Resin composites, Speedmixer, Consistency, Stickiness, Rheology, Handling behaviour, Viscosity, Bulk-fill, Degree of conversion, Polymerization kinetics, Depth of cure, Mechanical properties, Visco-elasticity, Creep
Abstract

Resin composites are the most commonly used material in restorative dentistry. They have been used initially for aesthetical reasons, but afterwards were modified to be used widely for their good aesthetic and mechanical properties performance. They are classified as visco-elastic materials which are composed of inorganic fillers and organic matrix. The aim of this study was to investigate some handling properties of uncured resin composites such as stickiness, consistency and rheology. Also, to measure the degree of conversion and creep behaviour under static loading of some resin composites. In the pre-cure stage, their handling properties are very essential to achieve a successful dental restoration. Therefore, dental practitioners are very critical in choosing the resin composite restorative material. A texture analyser was used to measure the stickiness and consistency of some commercial resin composites. Also, the rheology of different commercial and model resin composites were investigated using the Bohlin Rheometer in two different temperatures (room and body temperature).Moreover, Fourier transform infrared spectroscopy (FTIR) was used to determine the degree of conversion of several bulk-fill resin composites (DC) at 4 mm depth at different periods during 24 h post-irradiation. Also, the visco-elastic stability of cured resin composites with different resin matrices was investigated under static load at different maturation times (1 h and 24 h).

Published
2015

6. Poly-Ether Ether-Ketone Post Conditioned with Sulfuric Acid, Rose Bengal Activated by Photodynamic Therapy and Sandblasting on Pushout Bond Strength to Radicular Dentin Luted with Methyl Methacrylate and Composite-Based Cement.

Author

Almohareb, Thamer, Al Ahdal, Khold, Maawadh, Ahmed M., Alshamrani, Ahoud S., El Mourad, Aminah M., Al-Bishry, Fatima Y., and Alrahlah, Ali

Subjects
*METHYL methacrylate, *ROSE bengal, *PHOTODYNAMIC therapy, *SULFURIC acid, *BOND strengths
Abstract

Objective: Assessment of post surface conditioners [sulfuric acid (SA), Rose Bengal (RB), and sandblasting (SB)] and different luting cements [methyl methacrylate (MMA)-based cement and composite-based cement] on pushout bond strength (PBS) of poly-ether ether-ketone (PEEK) post bonded to canal dentin. Materials and methods: Endodontic treatment was performed on 120 single-rooted human premolar teeth. The preparation of the post space was performed and 4mm of gutta-percha was retained in the apical region of the root. One hundred and twenty PEEK posts were fabricated from a PEEK blank utilizing a Computer aided design-Computer aided manufacture (CAD-CAM) system. The PEEK posts were allocated randomly into four groups based on post surface conditioning (n = 30). Group A: SA, Group B: RB, Group C: SB, and Group D: No conditioning (NC). Each group was further divided into two subgroups based on the luting cement used for bonding (n = 15). Group A1, B1, C1, and D1 specimens were cemented using composite-based resin cement. However, Group A2, B2, C2, and D2 posts were luted with MMA-based resin cement. PBS assessment using a universal testing machine was performed. Failure modes were analyzed under a stereomicroscope. The data relating to the effects of surface treatment and luting types of cement were analyzed using one-way analysis of variance (ANOVA) and Tukey's post hoc test ( p = 0.05). Results: Coronal section of Group B2: RB+Super-Bond C&B [9.61 ± 0.75 megapascals (MPa)] displayed the highest bond scores of PEEK after root dentin. Whereas it was also discovered that Group D1: NC+Panavia®V5 (2.05 ± 0.72 MPa) presented the lowest PBS scores. Intergroup comparison analysis revealed that Group A2: SA+Super-Bond C&B and Group B2: RB+Super-Bond C&B displayed no significant difference in their bond scores. Conclusions: RB and SA possess the potential to be used as a PEEK post conditioner. MMA-based cement displayed better performance than composite-based cement. [ABSTRACT FROM AUTHOR]

Published
2023
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10. The Effect of Dentifrice on Micro-Hardness, Surface Gloss, and Micro-Roughness of Nano Filled Conventional and Bulk-Fill Polymer Composite—A Micro Indentation and Profilometric Study

Author

Binhasan, Mashael, primary, Solimanie, Abdulilah H., additional, Almuammar, Khalid S., additional, Alnajres, Ahmed R., additional, Alhamdan, Mai M., additional, Al Ahdal, Khold, additional, Alfaawaz, Yasser F., additional, Ali, Khalid, additional, Vohra, Fahim, additional, and Abduljabbar, Tariq, additional

Published
2022
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11. Assessment of Golden Proportion among Natural Maxillary Anterior Teeth of Global Population: A Systematic Review

Author

Ahmed, Naseer, primary, Abbasi, Maria S., additional, Vohra, Fahim, additional, Khalid, Shiza, additional, Halim, Mohamad Syahrizal, additional, Ab-Ghani, Zuryati, additional, Alrabiah, Mohammed, additional, Al Ahdal, Khold, additional, Alhamdan, Mai M., additional, AlFaraz, Yassen, additional, Al-Aali, Khulud A., additional, and Abduljabbar, Tariq, additional

Published
2022
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15. Bond Integrity of Titanium Surface to Resin Cement After Conditioning with Different Photobiomodulataion Therapy (PBT)

Author

Al Ahdal, Khold, primary, Al Deeb, Laila, additional, Bin-Shuwaish, Mohammed S., additional, Al-Hamdan, Rana S., additional, Al Deeb, Modhi, additional, Maawadh, Ahmed M., additional, Alhenaki, Aasem M., additional, AlHelal, Abdulaziz, additional, Alresayes, Saad, additional, Al-Aali, Khulud A., additional, Vohra, Fahim, additional, and Abduljabbar, Tariq, additional

Published
2021
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18. Efficacy of chlorhexidine, Er Cr YSGG laser and photodynamic therapy on the adhesive bond integrity of caries affected dentin. An in-vitro study

Author

Al Deeb, Laila, primary, Bin-Shuwaish, Mohammed S., additional, Abrar, Eisha, additional, Naseem, Mustafa, additional, Al-Hamdan, Rana S., additional, Maawadh, Ahmed M., additional, Al Deeb, Modhi, additional, Almohareb, Thamer, additional, Al Ahdal, Khold, additional, Vohra, Fahim, additional, and Abduljabbar, Tariq, additional

Published
2020
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19. Color Masking Ability of Lithium Disilicate Ceramic for Titanium Alloy Implant Abutments

Author

Vohra, Fahim, primary, Alnajashi, Sulaiman, additional, Aljardi, Abdulwahab, additional, Al Deeb, Modhi, additional, Al Deeb, Laila, additional, Al Ahdal, Khold, additional, Maawadh, Ahmed M., additional, Al-Hamdan, Rana S., additional, Alhenaki, Aasem M., additional, AlHelal, Abdulaziz, additional, Alresayes, Saad, additional, Al-Aali, Khulud A., additional, and Abduljabbar, Tariq, additional

Published
2020
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22. Influence of milling systems and marginal configurations on the fit of yttrium stabilized tetragonal zirconia polycrystals (Y-TZP)’ copings

Author

Al-Aali, Khulud A, primary, Bin-Shuwaish, Mohammed S., additional, Alhenaki, Aasem M, additional, Al Ahdal, Khold, additional, Al Deeb, Laila, additional, Maawadh, Ahmed M, additional, AlHelal, Abdulaziz, additional, Alshehri, Hiba, additional, Vohra, Fahim, additional, and Abduljabbar, Tariq, additional

Published
2020
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25. Marginal Integrity, Internal Adaptation and Compressive Strength of 3D Printed, Computer Aided Design and Computer Aided Manufacture and Conventional Interim Fixed Partial Dentures

Author

Al Deeb, Laila, primary, Al Ahdal, Khold, additional, Alotaibi, Ghaith, additional, Alshehri, Abdullah, additional, Alotaibi, Bader, additional, Alabdulwahab, Faris, additional, Al Deeb, Modhi, additional, AlFawaz, Yasser F., additional, Vohra, Fahim, additional, and Abduljabbar, Tariq, additional

Published
2019
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27. Adhesive Bond Integrity of Experimental Zinc Oxide Nanoparticles Incorporated Dentin Adhesive: An SEM, EDX, μ TBS, and Rheometric Analysis.

Author

Alfaawaz YF, Alamri R, Almohsen F, Shabab S, Alhamdan MM, Al Ahdal K, Farooq I, Vohra F, and Abduljabbar T

Subjects
Adhesives analysis, Composite Resins chemistry, Dental Cements, Dentin, Dentin-Bonding Agents, Materials Testing, Microscopy, Electron, Scanning, Resin Cements analysis, Resin Cements chemistry, Tensile Strength, Dental Bonding, Zinc Oxide analysis, Zinc Oxide chemistry
Abstract

Objective: Our study is aimed at preparing an experimental adhesive (EA) and assessing the influence of adding 5-10 wt.% concentrations of zinc oxide (ZnO) nanoparticles on the adhesive's mechanical properties., Methods: Field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) spectroscopy were employed to investigate the morphology and elemental distribution of the filler nanoparticles. To examine the adhesive properties, microtensile bond strength ( μ TBS) testing, an investigation of the rheological properties, degree of conversion (DC), and analysis of the interface between the adhesive and dentin were carried out., Results: The SEM micrographs of ZnO nanoparticles demonstrated spherical agglomerates. The EDX plotting confirmed the incidence of Zn and oxygen (O) in the ZnO nanoparticles. The highest μ TBS was observed for nonthermocycled (NTC) 5 wt.% ZnO group (32.11 ± 3.60 MPa), followed by the NTC-10 wt.% ZnO group (30.04 ± 3.24 MPa). Most of the failures observed were adhesive in nature. A gradual reduction in the viscosity was observed at higher angular frequencies, and the addition of 5 and 10 wt.% ZnO to the composition of the EA lowered its viscosity. The 5 wt.% ZnO group demonstrated suitable dentin interaction by showing the formation of resin tags, while for the 10 wt.% ZnO group, compromised resin tag formation was detected. DC was significantly higher in the 0% ZnO (EA) group., Conclusion: The reinforcement of the EA with 5 and 10 wt.% concentrations of ZnO nanoparticles produced an improvement in the adhesive's μ TBS. However, a reduced viscosity was observed for both nanoparticle-reinforced adhesives, and a negotiated dentin interaction was seen for 10 wt.% ZnO adhesive group. Further research exploring the influence of more filler concentrations on diverse adhesive properties is recommended., Competing Interests: The authors declare that they have no conflicts of interest., (Copyright © 2022 Yasser F. Alfaawaz et al.)

Published
2022
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