Nawal Aidaros - Academia.edu (original) (raw)

Papers by Nawal Aidaros

Research paper thumbnail of Microshear bond strength of adhesive interface in c-phycocyanin treated coronal and radicular dentin surfaces: comparative in vitro study

Lasers in dental science, Jan 24, 2024

Research paper thumbnail of Evaluation of the Effect of Intra-Coronal Bleaching after Using C-Phycocyanin as a Photosensitizing Agent- In vitro Study

Ahram Canadian Dental Journal, Dec 31, 2023

Research paper thumbnail of Microshear Bond Strength of Self-Etch Adhesive Incorporated with Seashell, Pearl, and Hydroxyapatite Nanoparticles to Dentin

Al-Azhar Journal of Dentistry, Dec 31, 2022

Research paper thumbnail of Effect of contamination of bulk-fill flowable resin composite with different contaminants during packing on its surface microhardness and compressive strength: in vitro study

BMC Oral Health, Oct 17, 2022

Background: Proper isolation and restoration of class V subgingival cavities are technique sensit... more Background: Proper isolation and restoration of class V subgingival cavities are technique sensitive, thus the resin composite restoration is liable to contamination. This in vitro study was conducted to evaluate the surface microhardness and compressive strength of bulk-fill flowable resin composite after being contaminated during its packing. Methods: Resin composite discs were prepared using split mold. The contaminated specimens were allocated into four groups (n = 20) according to the contaminant used: hemostatic agent (Group 1), alcohol (Group 2), artificial saliva (Group 3) and powdered gloves (Group 4). The non-contaminated specimens (n = 20) were used as control group. The surface microhardness and compressive strength of each group were tested 1-day post-photocuring (n = 5) and 1 month post-photocuring (n = 5). Values were presented as mean, standard deviation values and confidence intervals. Results: The surface microhardness of all groups didn't show a significant difference for different tested groups except for alcohol which showed a significant reduction on surface microhardness compared to control at 1 day postphotocuring (p = 0.001). The highest compressive strength mean values at 1 day and 1 month post-photocuring were recorded in control groups (110.42 MPa and 172.87 MPa respectively), followed by alcohol groups, then hemostatic agent groups, followed by artificial saliva with the least value recorded in powdered gloves groups (56.71 MPa and 49.5 MPa respectively). Conclusions: Contamination of bulk-fill flowable resin composite with hemostatic agent, alcohol, artificial saliva, or powdered gloves during its packing decreased its compressive strength after 1 month post-photocuring rather than affecting its surface microhardness.

Research paper thumbnail of Effect of Different Disinfection Protocols on The Resin Bond Strength to Dentin: In Vitro Study

Research Square (Research Square), Mar 10, 2022

Antimicrobial photodynamic therapy (aPDT) can be adopted as a modality for bacterial decontaminat... more Antimicrobial photodynamic therapy (aPDT) can be adopted as a modality for bacterial decontamination before cavity restoration to decrease the risk of secondary caries development. Trials to eliminate the microbial load using cavity disinfectants with no adverse effect on the bond strength of adhesive restoration geared toward the long-term success. C-phycocyanin is a safe photosensitizer to be used in disinfecting cavities before restoration especially in esthetic zone as it does not stain the tooth or the restoration as does the toluidine blue. (16) However no studies had evaluated the bond strength of resin to dentin disinfected with C-phycocyanin extracted from spirulina platensis. The teeth (n=48) will be allocated into 2 groups (n=24) according to the type of exposed dentin surface (coronal dentin and radicular dentin). Arti cial caries affected dentin of coronal dentin (ACAD) will be induced after pH cycling for 14 days. Dentin surfaces will be disinfected either by using C-phycocyanin as photosensitizer activated using 635-nm diode laser or 2 % chlorohexidine or not disinfected (control group). Then one step self-etch adhesive will be bonded to coronal dentin followed by resin composite packing into the tygon tube applied perpendicular onto the coronal dentin.Self-adhesive resin cement will be bonded to radicular dentin by packing it into the tygon tubes applied perpendicular onto the radicular dentin. Microshear bond strength of self-etch adhesive to coronal dentin; and resin cement to radicular dentin will be tested. One sample from each group will be prepared for scanning electron microscope (SEM) examination.

Research paper thumbnail of Fracture resistance of endodontically treated teeth bleached with extract of Spirulina Algae

Research paper thumbnail of Effect of Contamination of Bulk-Fill Flowable Resin Composite with Different Contaminants during Packing on its Surface Microhardness and Compressive Strength: In Vitro study

Background: Proper isolation and restoration of class V subgingival cavities are technique sensit... more Background: Proper isolation and restoration of class V subgingival cavities are technique sensitive, thus the resin composite restoration is liable to contamination. This in vitro study was conducted to evaluate the surface microhardness and compressive strength of bulk-fill flowable resin composite after being contaminated during its packing.Materials and methods: Resin composite discs were prepared using split mold. The contaminated specimens were allocated into four groups (n=20) according to the contaminant used: hemostatic agent (Group 1), alcohol (Group 2), artificial saliva (Group 3) and powdered gloves (Group 4). The non-contaminated specimens (n=20) were used as control group. The surface microhardness and compressive strength of each group were tested one-day post-photocuring (n=5) and one-month post-photocuring (n=5). Values were presented as mean, standard deviation (SD) values and confidence intervals. Results: At one-day and one-month post-photocuring, the highest sur...

Research paper thumbnail of A Comparative Evaluation of Remineralization Potential of Nano-Seashell, Nano-Pearl, and Nano-Hydroxyapatite Pastes Versus Fluoride-Based Toothpaste on Non-Cavitated Initial Enamel Lesion: An in Vitro Study

Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell p... more Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell paste, nano-pearl paste, and nano-hydroxyapatite (nHA) paste versus fluoridebased toothpaste by assessing enamel surface microhardness and laser fluorescence analysis (DIAGNOdent).Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell paste, nano-pearl paste, and nano-hydroxyapatite (nHA) paste versus fluoridebased toothpaste by assessing enamel surface microhardness and laser fluorescence analysis (DIAGNOdent). Materials and methods: Eighty premolars were used in this in vitro study. Premolars were distributed into 4 groups of 20 teeth each, according to the remineralizing agent used. Group A (n=20): teeth were treated with nano-seashell paste; Group B (n=20): teeth were treated with nano pearl paste; Group C (n=20): teeth were treated with nHA paste; Group D (n=20): teeth were treated with fluoride-based toothpaste as a positive control group. Te...

Research paper thumbnail of A Comparative Evaluation of Remineralization Potential of Nano-Seashell, Nano-Pearl, and Nano-Hydroxyapatite Pastes Versus Fluoride-Based Toothpaste on Non-Cavitated Initial Enamel Lesion: An in Vitro Study

Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell p... more Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell paste, nano-pearl paste, and nano-hydroxyapatite (nHA) paste versus fluoridebased toothpaste by assessing enamel surface microhardness and laser fluorescence analysis (DIAGNOdent).Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell paste, nano-pearl paste, and nano-hydroxyapatite (nHA) paste versus fluoridebased toothpaste by assessing enamel surface microhardness and laser fluorescence analysis (DIAGNOdent). Materials and methods: Eighty premolars were used in this in vitro study. Premolars were distributed into 4 groups of 20 teeth each, according to the remineralizing agent used. Group A (n=20): teeth were treated with nano-seashell paste; Group B (n=20): teeth were treated with nano pearl paste; Group C (n=20): teeth were treated with nHA paste; Group D (n=20): teeth were treated with fluoride-based toothpaste as a positive control group. Te...

Research paper thumbnail of Remineralization Efficiency of Different Toothpastes on Human Enamel Subjected to Acid Challenge: in Vitro Study

Al-Azhar Dental Journal for Girls, 2022

Purpose: The objective of this in vitro study was to evaluate and compare the remineralizing pote... more Purpose: The objective of this in vitro study was to evaluate and compare the remineralizing potential of dentifrices containing nanohydroxyapatite, fluoride, and bioactive glass with and without fluoride on enamel by assessing the enamel surface microhardness the enamel structural and elemental analysis through Energy Dispersive X-ray Analysis (EDX). Methods: Sound extracted third molars were divided into 5 groups. Group A (n=15): Hydroxyapatite toothpaste (Karex) was used to treat the teeth; Group B (n=15): teeth were treated with Hydroxyapatite and Fluoride containing toothpaste (Apacare); Group C (n=15): teeth were treated with ChloroCalcium Phosphosilicate containing toothpaste (Biomin C); Group D (n=15): teeth were treated with FluoroCalcium Phosphosilicate containing toothpaste (Biomin F); negative control group (n=15): teeth not subjected to any treatment. All teeth (experimental and negative control groups). After 2 weeks of the dynamic pH-cycling; 10 teeth of each group we...

Research paper thumbnail of Effect of Incorporating Nano-Pearl and Nano-Seashell Particles into Fluoride-based Pits and Fissure Sealant on Enamel Remineralization of Permanent Extracted Molars: An In Vitro Study

Advanced Dental Journal, 2021

Research paper thumbnail of Evaluation The Efficiency of Nano Seashell, Sodium Fluoride And A Commercially Available Toothpaste On Dentinal Tubules Occlusion After Acid Attack Using Scanning Electron Microscope: In vitro Study

Objectives: To evaluate the efficiency and stability of Nano seashell, Sodium Fluoride and Signal... more Objectives: To evaluate the efficiency and stability of Nano seashell, Sodium Fluoride and Signal Complete 8 in treatment of dentine hypersensitivity. Methods: Forty freshly extracted premolar teeth were collected, disinfected, and sliced into 1.0± 0.1mm thickness. The dentin discs were randomly divided into two main groups of 20 discs each. Group 1(n=20): Dentin discs subjected to treatment not followed by acid challenge. Group 2 (n=20): Dentin discs subjected to treatment followed by acid challenge. Each group was further subdivided into 4 subgroups of 5 discs each according to the treatment used; Subgroup A (Control group): discs received no treatment; Subgroup B: discs treated with Sodium Fluoride paste; Subgroup C: discs treated with Nano Seashell paste; Subgroup D: discs treated with Signal Complete 8 toothpaste. Evaluation of dentinal tubules obliteration was done under scanning electron microscope. Results: There was a significant change in the diameter of tubules and percen...

Research paper thumbnail of Effect of Green Tea, Black Tea and Moringa Oleifera on Remineralization of Artificially Demineralized Enamel and Dentin: An In-vitro Microhardness Analysis

Objectives: The present in vitro study aimed to investigate and compare the effect of green tea, ... more Objectives: The present in vitro study aimed to investigate and compare the effect of green tea, black tea and Moringa Oleifera on artificially demineralized enamel and dentin. Methods: Forty intact maxillary molar teeth were sectioned mesiodistally. The demineralized samples of enamel and dentin were randomly divided into four subgroups according to the treatment utilized. Group 1: Green tea extract; Group 2: Black tea extract; Group 3: Moringa Oleifera extract and Group 4: Artificial saliva (control). The samples were subsequently evaluated using microhardness tester. Data were tabulated and statistically analyzed using ANOVA and t-test. Results: A statistically significant difference was found between baselines followed by after treatment, while the lowest mean value was found in after demineralization. A statistically non-significant difference was found between the four tested groups in enamel samples. In dentin, the highest mean value was found in Moringa Oleifera while the...

Research paper thumbnail of Assessment the Impact of Moringa Oleifera Extracts and Ascorbic Acid Solution as Antioxidants on Microshear Bond Strength of Resin Composite to Bleached Bovine Enamel (In Vitro Study)

Egyptian Dental Journal

Objective: The present study was conducted to assess the impact of Moringa Oleifera extracts and ... more Objective: The present study was conducted to assess the impact of Moringa Oleifera extracts and ascorbic acid solution on microshear bond strength of composite resin to bleached Enamel. Methods: Twenty-five lower bovine incisors were randomly divided into five groups of 5 teeth each; Group I (n=5) : Where no bleaching was done and no antioxidants were used , Group II (n=5): Where bleaching was done, but no antioxidants were used, Group III (n=5) (Positive control group): Bleaching followed by treatment with 10 % Ascorbic acid solution for 10 minutes, Group IV (n=5): Bleaching followed by treatment with 80 % ethanol extract of Moringa Oleifera for 10 minutes, Group V (n=5): Bleaching followed by treatment with 80 % methanol extract of Moringa Oleifera for 10 minutes. Resin composite was applied on labial enamel surfaces of all groups. The results obtained were explored for normality using Kolmogorov-Smirnov and Shapiro-Wilk tests and One-way ANOVA followed by Tukey post hic test. Results: The results revealed statistically significant difference found between the five groups were p<0.001 where the highest mean value (17.34 Mpa) was recorded for (Group I; No bleaching) followed by (9.22 Mpa) was recorded for (Group III; Ascorbic Acid treatment after bleaching). The least mean value (4.41 Mpa) wasrecorded for (group II; No antioxidant after bleaching). No statistically significant difference was found between (Group III =Ascorbic Acid treatment after Bleaching) and (Group IV= Ethanol extract of Moringa Oleifera treatment after Bleaching). Conclusion: Using 10 % Ascorbic acid solution could reverse the reduced bond strength after bleaching and Ethanol extract of Moringa Oleifera can be a future candidate to be used as antioxidant solution after bleaching if immediate bonding is to be carried out.

Research paper thumbnail of The Effect of Incorporating Nanocalcium Phosphate Particles into Biodentine on Pulpal Tissue Response (In Vitro Study)

Al-Azhar Dental Journal for Girls

Objectives: This study was conducted to evaluate the effect of incorporating Nanocalcium phosphat... more Objectives: This study was conducted to evaluate the effect of incorporating Nanocalcium phosphate (NCP) particles into Biodentine™ on pulpal tissue response as a direct pulp capping material (entire tooth culture model). Materials and methods:-A total of forty freshly human premolar teeth extracted for orthodontic reasons were used. After cavity preparation and mechanical pulp exposure, the teeth were divided into 2 main groups (20 teeth each) according to the capping material used; where group (M1) refers to pulps capped with Biodentine™, and group (M2) refers to pulps capped with Biodentine incorporated with NCP. Each group was further subdivided into two subgroups according to the culture period; where subgroup (P1) refers to teeth cultured for 14 days, and subgroup (P2) refers to teeth cultured for 28 days. At the end of each culture period, the teeth were histologically examined to assess the dentine bridge thickness of each group after 14 and 28 days. Moreover, elemental analysis of Calcium and Phosphorous ions in the dentine bridge was performed using SEM-EDX. Results: Direct pulp capping with Biodentine incorporated with NCP showed thicker dentine bridge when compared to Biodentine™ alone. There is a positive correlation between the weight % of Calcium and Phosphorous ions in the dentine bridge below both capping materials and the dentine bridge thickness. Conclusion: Biodentine incorporated with NCP could be a good candidate for pulp capping in the future.

Research paper thumbnail of Microshear bond strength of adhesive interface in c-phycocyanin treated coronal and radicular dentin surfaces: comparative in vitro study

Lasers in dental science, Jan 24, 2024

Research paper thumbnail of Evaluation of the Effect of Intra-Coronal Bleaching after Using C-Phycocyanin as a Photosensitizing Agent- In vitro Study

Ahram Canadian Dental Journal, Dec 31, 2023

Research paper thumbnail of Microshear Bond Strength of Self-Etch Adhesive Incorporated with Seashell, Pearl, and Hydroxyapatite Nanoparticles to Dentin

Al-Azhar Journal of Dentistry, Dec 31, 2022

Research paper thumbnail of Effect of contamination of bulk-fill flowable resin composite with different contaminants during packing on its surface microhardness and compressive strength: in vitro study

BMC Oral Health, Oct 17, 2022

Background: Proper isolation and restoration of class V subgingival cavities are technique sensit... more Background: Proper isolation and restoration of class V subgingival cavities are technique sensitive, thus the resin composite restoration is liable to contamination. This in vitro study was conducted to evaluate the surface microhardness and compressive strength of bulk-fill flowable resin composite after being contaminated during its packing. Methods: Resin composite discs were prepared using split mold. The contaminated specimens were allocated into four groups (n = 20) according to the contaminant used: hemostatic agent (Group 1), alcohol (Group 2), artificial saliva (Group 3) and powdered gloves (Group 4). The non-contaminated specimens (n = 20) were used as control group. The surface microhardness and compressive strength of each group were tested 1-day post-photocuring (n = 5) and 1 month post-photocuring (n = 5). Values were presented as mean, standard deviation values and confidence intervals. Results: The surface microhardness of all groups didn't show a significant difference for different tested groups except for alcohol which showed a significant reduction on surface microhardness compared to control at 1 day postphotocuring (p = 0.001). The highest compressive strength mean values at 1 day and 1 month post-photocuring were recorded in control groups (110.42 MPa and 172.87 MPa respectively), followed by alcohol groups, then hemostatic agent groups, followed by artificial saliva with the least value recorded in powdered gloves groups (56.71 MPa and 49.5 MPa respectively). Conclusions: Contamination of bulk-fill flowable resin composite with hemostatic agent, alcohol, artificial saliva, or powdered gloves during its packing decreased its compressive strength after 1 month post-photocuring rather than affecting its surface microhardness.

Research paper thumbnail of Effect of Different Disinfection Protocols on The Resin Bond Strength to Dentin: In Vitro Study

Research Square (Research Square), Mar 10, 2022

Antimicrobial photodynamic therapy (aPDT) can be adopted as a modality for bacterial decontaminat... more Antimicrobial photodynamic therapy (aPDT) can be adopted as a modality for bacterial decontamination before cavity restoration to decrease the risk of secondary caries development. Trials to eliminate the microbial load using cavity disinfectants with no adverse effect on the bond strength of adhesive restoration geared toward the long-term success. C-phycocyanin is a safe photosensitizer to be used in disinfecting cavities before restoration especially in esthetic zone as it does not stain the tooth or the restoration as does the toluidine blue. (16) However no studies had evaluated the bond strength of resin to dentin disinfected with C-phycocyanin extracted from spirulina platensis. The teeth (n=48) will be allocated into 2 groups (n=24) according to the type of exposed dentin surface (coronal dentin and radicular dentin). Arti cial caries affected dentin of coronal dentin (ACAD) will be induced after pH cycling for 14 days. Dentin surfaces will be disinfected either by using C-phycocyanin as photosensitizer activated using 635-nm diode laser or 2 % chlorohexidine or not disinfected (control group). Then one step self-etch adhesive will be bonded to coronal dentin followed by resin composite packing into the tygon tube applied perpendicular onto the coronal dentin.Self-adhesive resin cement will be bonded to radicular dentin by packing it into the tygon tubes applied perpendicular onto the radicular dentin. Microshear bond strength of self-etch adhesive to coronal dentin; and resin cement to radicular dentin will be tested. One sample from each group will be prepared for scanning electron microscope (SEM) examination.

Research paper thumbnail of Fracture resistance of endodontically treated teeth bleached with extract of Spirulina Algae

Research paper thumbnail of Effect of Contamination of Bulk-Fill Flowable Resin Composite with Different Contaminants during Packing on its Surface Microhardness and Compressive Strength: In Vitro study

Background: Proper isolation and restoration of class V subgingival cavities are technique sensit... more Background: Proper isolation and restoration of class V subgingival cavities are technique sensitive, thus the resin composite restoration is liable to contamination. This in vitro study was conducted to evaluate the surface microhardness and compressive strength of bulk-fill flowable resin composite after being contaminated during its packing.Materials and methods: Resin composite discs were prepared using split mold. The contaminated specimens were allocated into four groups (n=20) according to the contaminant used: hemostatic agent (Group 1), alcohol (Group 2), artificial saliva (Group 3) and powdered gloves (Group 4). The non-contaminated specimens (n=20) were used as control group. The surface microhardness and compressive strength of each group were tested one-day post-photocuring (n=5) and one-month post-photocuring (n=5). Values were presented as mean, standard deviation (SD) values and confidence intervals. Results: At one-day and one-month post-photocuring, the highest sur...

Research paper thumbnail of A Comparative Evaluation of Remineralization Potential of Nano-Seashell, Nano-Pearl, and Nano-Hydroxyapatite Pastes Versus Fluoride-Based Toothpaste on Non-Cavitated Initial Enamel Lesion: An in Vitro Study

Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell p... more Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell paste, nano-pearl paste, and nano-hydroxyapatite (nHA) paste versus fluoridebased toothpaste by assessing enamel surface microhardness and laser fluorescence analysis (DIAGNOdent).Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell paste, nano-pearl paste, and nano-hydroxyapatite (nHA) paste versus fluoridebased toothpaste by assessing enamel surface microhardness and laser fluorescence analysis (DIAGNOdent). Materials and methods: Eighty premolars were used in this in vitro study. Premolars were distributed into 4 groups of 20 teeth each, according to the remineralizing agent used. Group A (n=20): teeth were treated with nano-seashell paste; Group B (n=20): teeth were treated with nano pearl paste; Group C (n=20): teeth were treated with nHA paste; Group D (n=20): teeth were treated with fluoride-based toothpaste as a positive control group. Te...

Research paper thumbnail of A Comparative Evaluation of Remineralization Potential of Nano-Seashell, Nano-Pearl, and Nano-Hydroxyapatite Pastes Versus Fluoride-Based Toothpaste on Non-Cavitated Initial Enamel Lesion: An in Vitro Study

Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell p... more Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell paste, nano-pearl paste, and nano-hydroxyapatite (nHA) paste versus fluoridebased toothpaste by assessing enamel surface microhardness and laser fluorescence analysis (DIAGNOdent).Aim: This in vitro study evaluated and compared the remineralization potential of nano-seashell paste, nano-pearl paste, and nano-hydroxyapatite (nHA) paste versus fluoridebased toothpaste by assessing enamel surface microhardness and laser fluorescence analysis (DIAGNOdent). Materials and methods: Eighty premolars were used in this in vitro study. Premolars were distributed into 4 groups of 20 teeth each, according to the remineralizing agent used. Group A (n=20): teeth were treated with nano-seashell paste; Group B (n=20): teeth were treated with nano pearl paste; Group C (n=20): teeth were treated with nHA paste; Group D (n=20): teeth were treated with fluoride-based toothpaste as a positive control group. Te...

Research paper thumbnail of Remineralization Efficiency of Different Toothpastes on Human Enamel Subjected to Acid Challenge: in Vitro Study

Al-Azhar Dental Journal for Girls, 2022

Purpose: The objective of this in vitro study was to evaluate and compare the remineralizing pote... more Purpose: The objective of this in vitro study was to evaluate and compare the remineralizing potential of dentifrices containing nanohydroxyapatite, fluoride, and bioactive glass with and without fluoride on enamel by assessing the enamel surface microhardness the enamel structural and elemental analysis through Energy Dispersive X-ray Analysis (EDX). Methods: Sound extracted third molars were divided into 5 groups. Group A (n=15): Hydroxyapatite toothpaste (Karex) was used to treat the teeth; Group B (n=15): teeth were treated with Hydroxyapatite and Fluoride containing toothpaste (Apacare); Group C (n=15): teeth were treated with ChloroCalcium Phosphosilicate containing toothpaste (Biomin C); Group D (n=15): teeth were treated with FluoroCalcium Phosphosilicate containing toothpaste (Biomin F); negative control group (n=15): teeth not subjected to any treatment. All teeth (experimental and negative control groups). After 2 weeks of the dynamic pH-cycling; 10 teeth of each group we...

Research paper thumbnail of Effect of Incorporating Nano-Pearl and Nano-Seashell Particles into Fluoride-based Pits and Fissure Sealant on Enamel Remineralization of Permanent Extracted Molars: An In Vitro Study

Advanced Dental Journal, 2021

Research paper thumbnail of Evaluation The Efficiency of Nano Seashell, Sodium Fluoride And A Commercially Available Toothpaste On Dentinal Tubules Occlusion After Acid Attack Using Scanning Electron Microscope: In vitro Study

Objectives: To evaluate the efficiency and stability of Nano seashell, Sodium Fluoride and Signal... more Objectives: To evaluate the efficiency and stability of Nano seashell, Sodium Fluoride and Signal Complete 8 in treatment of dentine hypersensitivity. Methods: Forty freshly extracted premolar teeth were collected, disinfected, and sliced into 1.0± 0.1mm thickness. The dentin discs were randomly divided into two main groups of 20 discs each. Group 1(n=20): Dentin discs subjected to treatment not followed by acid challenge. Group 2 (n=20): Dentin discs subjected to treatment followed by acid challenge. Each group was further subdivided into 4 subgroups of 5 discs each according to the treatment used; Subgroup A (Control group): discs received no treatment; Subgroup B: discs treated with Sodium Fluoride paste; Subgroup C: discs treated with Nano Seashell paste; Subgroup D: discs treated with Signal Complete 8 toothpaste. Evaluation of dentinal tubules obliteration was done under scanning electron microscope. Results: There was a significant change in the diameter of tubules and percen...

Research paper thumbnail of Effect of Green Tea, Black Tea and Moringa Oleifera on Remineralization of Artificially Demineralized Enamel and Dentin: An In-vitro Microhardness Analysis

Objectives: The present in vitro study aimed to investigate and compare the effect of green tea, ... more Objectives: The present in vitro study aimed to investigate and compare the effect of green tea, black tea and Moringa Oleifera on artificially demineralized enamel and dentin. Methods: Forty intact maxillary molar teeth were sectioned mesiodistally. The demineralized samples of enamel and dentin were randomly divided into four subgroups according to the treatment utilized. Group 1: Green tea extract; Group 2: Black tea extract; Group 3: Moringa Oleifera extract and Group 4: Artificial saliva (control). The samples were subsequently evaluated using microhardness tester. Data were tabulated and statistically analyzed using ANOVA and t-test. Results: A statistically significant difference was found between baselines followed by after treatment, while the lowest mean value was found in after demineralization. A statistically non-significant difference was found between the four tested groups in enamel samples. In dentin, the highest mean value was found in Moringa Oleifera while the...

Research paper thumbnail of Assessment the Impact of Moringa Oleifera Extracts and Ascorbic Acid Solution as Antioxidants on Microshear Bond Strength of Resin Composite to Bleached Bovine Enamel (In Vitro Study)

Egyptian Dental Journal

Objective: The present study was conducted to assess the impact of Moringa Oleifera extracts and ... more Objective: The present study was conducted to assess the impact of Moringa Oleifera extracts and ascorbic acid solution on microshear bond strength of composite resin to bleached Enamel. Methods: Twenty-five lower bovine incisors were randomly divided into five groups of 5 teeth each; Group I (n=5) : Where no bleaching was done and no antioxidants were used , Group II (n=5): Where bleaching was done, but no antioxidants were used, Group III (n=5) (Positive control group): Bleaching followed by treatment with 10 % Ascorbic acid solution for 10 minutes, Group IV (n=5): Bleaching followed by treatment with 80 % ethanol extract of Moringa Oleifera for 10 minutes, Group V (n=5): Bleaching followed by treatment with 80 % methanol extract of Moringa Oleifera for 10 minutes. Resin composite was applied on labial enamel surfaces of all groups. The results obtained were explored for normality using Kolmogorov-Smirnov and Shapiro-Wilk tests and One-way ANOVA followed by Tukey post hic test. Results: The results revealed statistically significant difference found between the five groups were p<0.001 where the highest mean value (17.34 Mpa) was recorded for (Group I; No bleaching) followed by (9.22 Mpa) was recorded for (Group III; Ascorbic Acid treatment after bleaching). The least mean value (4.41 Mpa) wasrecorded for (group II; No antioxidant after bleaching). No statistically significant difference was found between (Group III =Ascorbic Acid treatment after Bleaching) and (Group IV= Ethanol extract of Moringa Oleifera treatment after Bleaching). Conclusion: Using 10 % Ascorbic acid solution could reverse the reduced bond strength after bleaching and Ethanol extract of Moringa Oleifera can be a future candidate to be used as antioxidant solution after bleaching if immediate bonding is to be carried out.

Research paper thumbnail of The Effect of Incorporating Nanocalcium Phosphate Particles into Biodentine on Pulpal Tissue Response (In Vitro Study)

Al-Azhar Dental Journal for Girls

Objectives: This study was conducted to evaluate the effect of incorporating Nanocalcium phosphat... more Objectives: This study was conducted to evaluate the effect of incorporating Nanocalcium phosphate (NCP) particles into Biodentine™ on pulpal tissue response as a direct pulp capping material (entire tooth culture model). Materials and methods:-A total of forty freshly human premolar teeth extracted for orthodontic reasons were used. After cavity preparation and mechanical pulp exposure, the teeth were divided into 2 main groups (20 teeth each) according to the capping material used; where group (M1) refers to pulps capped with Biodentine™, and group (M2) refers to pulps capped with Biodentine incorporated with NCP. Each group was further subdivided into two subgroups according to the culture period; where subgroup (P1) refers to teeth cultured for 14 days, and subgroup (P2) refers to teeth cultured for 28 days. At the end of each culture period, the teeth were histologically examined to assess the dentine bridge thickness of each group after 14 and 28 days. Moreover, elemental analysis of Calcium and Phosphorous ions in the dentine bridge was performed using SEM-EDX. Results: Direct pulp capping with Biodentine incorporated with NCP showed thicker dentine bridge when compared to Biodentine™ alone. There is a positive correlation between the weight % of Calcium and Phosphorous ions in the dentine bridge below both capping materials and the dentine bridge thickness. Conclusion: Biodentine incorporated with NCP could be a good candidate for pulp capping in the future.