Khalid Noaman - Academia.edu (original) (raw)

Papers by Khalid Noaman

Research paper thumbnail of Randomized Clinical Trial to Compare the Efficacy of Two Calcium Silicate Based Materials in Treatment of Deep Carious Lesion

Al-Azhar Journal of Dental Science

Objective: this study was directed to clinically and radiographically evaluate mineral trioxide a... more Objective: this study was directed to clinically and radiographically evaluate mineral trioxide aggregate (MTA) and TheraCal LC as indirect pulp capping (IPC) materials. Subjects and Methods: Twenty male patients aged 17-35 years with deep caires in class one in lower molars were randomly divided into two equal groups (n = 10). Group 1: pulp were capped using MTA. Group 2: pulp were capped using TheraCal LC. Clinical evaluation was performed at 1 week, 3, and 6 months after IPC for presence/ absence of spontaneous pain, tenderness to percussion, draining sinuses and pulp response to thermal pulp vitality test. Digital periapical radiographs were taken at 1 week, 3, and 6 months after IPC to evaluate the changes in the width of periodontal ligament space and presence/absence of periapical lesion. Results: Clinically, all cases showed criteria of successful treatment except 1case in each group. Statistical analysis revealed no statistically significant difference between both groups (P > 0.05). Radiographically, periapical lesions and the changes in the width of periodontal ligament space were not significantly different between both groups recording (P > 0.05). Conclusion: Clinically and radiographically, MTA and TheraCal LC are favorable materials for IPC.

Research paper thumbnail of A Comparative Study in Penetration Depth of Resin-Based Materials Into White Spot Lesion

This study conducts an in vitro comparison of the depth of penetration of a resin infiltrant mate... more This study conducts an in vitro comparison of the depth of penetration of a resin infiltrant material (Icon), a two-step self-etch resin-based material (OptiBond TM XTR), and a solvent-free self-etch resin-based material (Bond-1SF) into white spot lesions (WSLs). Methodology: Through an in vitro clinical trial, a total of 60 human posterior teeth, free from caries, were collected. The buccal and lingual surfaces of each tooth were marked, resulting in a total of 120 samples of surfaces, which represented the operational sample size. The samples were randomly divided into four equal main groups (n = 30) according to the materials used. Group 1 (M1) was the control group. Group 2 (M2) was restored using Icon, Group 3 (M3) using OptiBond TM XTR, and Group 4 (M4) using Bond-1SF. Each group was divided into two equal groups (n = 15) according to the surface treatment, and the first group (W1) was subjected to surface treatment but the second group (W2) was not. The resin penetration depth was observed using confocal laser scanning microscopy. Findings: The highest penetration depth was recorded for Group 2 with surface treatment (M2W1), and the lowest was recorded for Group 4 without surface treatment (M4W2). An analysis of variance test revealed a statistically significant difference in the penetration depth of tested materials (p < 0.05). Conclusion: Icon shows the best penetration depth value in relation to WSLs, whereas Bond-1SF shows the worst. Surface treatment has a positive effect on the penetration depth of the resin-based materials.

Research paper thumbnail of Effect of mouthwash and accelerated aging on the color stability of esthetic restorative materials

PubMed, Jun 1, 2000

Purpose: To evaluate the color stability of esthetic restorative materials after immersion in mou... more Purpose: To evaluate the color stability of esthetic restorative materials after immersion in mouthwashes and accelerated aging. Materials and methods: Compomers and resin-based composites (RBC) were measured at baseline and repeatedly after immersion in three kinds of mouthwash (Listerine, Peridex, Rembrandt Age Defying) for 24 hrs and 7 days, and after aging for 150 kJ/m2. Color was measured according to CIE L*a*b* color scale on a reflection spectrophotometer. Results: After immersion for 7 days, the mouthwash groups did not produce significantly higher color changes than the distilled water group, except with some mouthwashes used with Tetric-Ceram. After immersion for 7 days and aging for 150 kJ/m2, the mouthwash groups did not produce significantly higher color changes than the distilled water group. Aging in weathering chamber produced color change (deltaE*) of 1.1-3.9, which was mainly influenced by the material. With some exceptions, the color changes from immersion of the RBCs and compomers in mouthwashes were not perceptible (deltaE*<3.3).

Research paper thumbnail of Evaluation of biomimetic remineralization of demineralized enamel using different concentrations of Nano-complexes of phosphorylated chitosan and amorphous calcium phosphate

Al-Azhar Journal of Dental Science

Objective: This study was conducted to evaluate the remineralizing efficacy of biomimetic reminer... more Objective: This study was conducted to evaluate the remineralizing efficacy of biomimetic remineralization of demineralized enamel using different concentrations and different time of application of nanocomplexes phosphorylated chitosan-amorphous calcium phosphate on artificially induced enamel lesions using mineral content assessment (EDX) at different storage time. Material and methods: A total number of 40 bovine incisors from the second dentition were selected for this in vitro study. Teeth with cracks, caries were excluded. They were divided into two main groups (n = 20 each) according to the concentration of remineralizing agent. Each group was divided into two subgroups (n=10 each) according to time of application (2 minutes and 3 minutes). Results: The present study has shown that a statistically significant difference was found between demineralized specimens and all experimental groups. Specimens stored for three months showed the highest mean value of remineralization (the best result), while specimens stored for 1month showed the lowest mean value of remineralization, regardless to different concentration of remineralizing agents and their time of application. Conclusion: Nanocomplexes phosphorylated chitosan amorphous calcium phosphate is considered a precious biomimetic remineralizing agent. Storage time plays an important role during remineralizing process as mineral precipitation to tooth structure is a continuous dynamic process.

Research paper thumbnail of Evaluation of the effectiveness of three different desensitizing agents in dentinal tubule occlusion using scanning electron microscope

Al-Azhar Journal of Dental Science

Objective: This study was conducted to evaluate and compare the laboratory effect of three differ... more Objective: This study was conducted to evaluate and compare the laboratory effect of three different treatment modalities in dentinal tubules occlusion. Materials and methods: Total of (27) teeth were enrolled in the study. Dentin discs prepared from teeth to apply desensitizing agents evaluated through occluding dentinal tubules by scanning electron microscope (SEM) examination. Discs were used in the study which were randomly divided into three groups (n=9) according to desensitizing agent (D) used while D1: Gluma adhesive, D2: Citrene varnish and D3: Charm varinsh. Each group was divided into three sub groups(n=3) according to storage time (T) where T1: 1 week, T2: 1 months and T3: 3 months. Results: The results of this in-vitro study revealed that there was high significant difference (p ≤ 0.05) in percentage of dentinal tubules occlusion before and after treatment for all tested groups. Totally there was statistically significant difference (p ≤ 0.05) between the three groups as proven by Chi square test where Citrine varnish group was the highest followed by charm sense varnish group and the lowest was Gluma group in management of dentin hypersensitivity. Conclusions: Citrine varnish , Charm varnish and Gluma were effective in occluding dentinal tubules, with Citrine varnish being the most effective up to 3 months.

Research paper thumbnail of A Comparative Evaluation of the Efficacy of Three Different Treatment Modalities in Dentin Hypersensitivity Management (An In Vivo Study)

Objective : This study was conducted to evaluate the clinical effect of three different treatment... more Objective : This study was conducted to evaluate the clinical effect of three different treatment modalities in management of dentin hypersensitivity. patients and methods:Twenty seven hypersensitive teeth from nine patients were enrolled for this study. Patients were randomly divided into three groups according to desensitizing agents (Citrine varnish, Charm varnish and Gluma adhesive) . Patients assessment of dentin hypersensitivity was done before application of the agent (baseline) then 1 week, 4 weeks and 3 months respectively. Patients were asked to rate their perception to air stimuli by using and Visual Analogue Scale (VAS). Results: The results of this clinical study revealed that there was high significant difference (p ≤ 0.05) between pain scores before and after treatment for all tested groups. Totally there was statistically significant difference (p ≤ 0.05) between the three groups as proven by Chi square test where Citrine varnish group was the highest followed by cha...

Research paper thumbnail of Evaluation of The Degree of Remineralization of Subclinical Carious Lesions Using Chitosan and Conventional Remineralizing Agents (An in vitro Study)

The Egyptian Journal of Hospital Medicine, 2020

Background: Dental caries remains to be the most common oral disease, caused by the unbalance bet... more Background: Dental caries remains to be the most common oral disease, caused by the unbalance between demineralization effect of bacteria and remineralization process. In the early phase of caries, this balance can be restored and the demineralization effect reversed using an enhanced approach to remineralization. Objective: The aim of the study is directed to evaluate the degree of demineralization and remineralization in subclinical carious lesion using chitosan and conventional remineralizing agent. Materials and methods: A total number of 40 sound non-carious human anterior teeth were collected from oral surgery clinic, free of cracks and any developmental defects, were used in this study in age range (20-40) years old. Teeth were stored in distilled water at room temperature until use. The teeth were divided into four main groups (10 teeth each). Results: In the present study specimens treated with chitosan after six months storage time (the best result) recorded the highest mean value of remineralization while fluoride record the lowest mean value of remineralization (the worst result) through the remineralizing agents chitosan, casein, and fluoride. The specimens subjected to Diagnodent fluorescent reading proved that for all remineralizing agents (chitosan, casein and fluoride) and also control group the remineralization to tooth structure was increased by increasing the storage time. Conclusion: Chitosan is considered a valuable biomimetic remineralizing agent. Mineral precipitation to tooth structures by using remineralizing agents is a continuous dynamic process.

Research paper thumbnail of The Influence of Different Enamel Cavo-surface Configurations on the Marginal Leakage of Class V Composite Restorations using different adhesive systems

Purpose: This in vitro study investigated the effect of different cavosurface preparations: butt ... more Purpose: This in vitro study investigated the effect of different cavosurface preparations: butt joint; long bevel & scalloped bevel at both cervical and occlusal margins of class V composite restorations bonded with two currently used different adhesive systems Scotchbond Multipurpose Plus & PromptL-pop; after thermal and mechanical load cycling simulating one year of clinical service. Methods: Rectangular class V cavities on the buccal surfaces of 60 permanent lower molar teeth; with the occlusal margin in enamel just below the buccal deflection ridge; and the cervical margin just above the cemento-enamel junction. The teeth were randomly divided into three main groups (I; II & III) of 20 teeth each; according to the different cavosurface configurations. Each group was further subdivided into 2 subgroups (A & B) of 10 teeth each according to the type of bonding agent used. All cavities were restored using Z 250 composite resin. All specimens were thermo-cycled for 600 cycles; prio...

Research paper thumbnail of Nanoleakage Evaluation of Nano-Filled Resin Composite using Different Adhesive Systems at Different Dentin Depth

Objective: This study evaluated the nanoleakage of nano-filled resin composite using different ad... more Objective: This study evaluated the nanoleakage of nano-filled resin composite using different adhesive systems at different dentin depth. Material and Methods: A total of 120 freshly extracted human molars were used in this study. The selected teeth were randomly divided into two main groups according to adhesive system(self-etch and total etch), each main group were divided in to two groups according to dentin depth(superficial and deep dentin), each group were divided in to 3 sub-groups according to storage periods(24hours,3 months and 6 months). All the prepared cavities were restored incrementally using the nanofilled resin composite, then the specimens were immersed into silver nitrate and sectioned. Nanoleakage was measured. Results: The results showed that there was no statistically significant difference between self-etch and total etch according to the effect of adhesive system nor dentin depth on nanoleakage, while there was a statistically significant increase in median ...

Research paper thumbnail of The inflammatory response of pulp tissue after different direct pulp capping materials at different storage time

Al-Azhar Journal of Dental Science, 2021

Objective: Evaluate histologically and compare the inflammatory pulp response following direct pu... more Objective: Evaluate histologically and compare the inflammatory pulp response following direct pulp capping of mechanically exposed dogs' teeth with: Ca(OH)2 base Dycal, UltraBlend Plus and TheraCal LC, at different time intervals. Subjects and methods. A total of 54 permanent teeth of six healthy dogs were used. They were randomly divided into three groups (n=18) according to pulp capping material used. Group I: Dycal, Group II: UltraBlend Plus (UBP) and Group III: TheraCal LC. All cavities were restored with Riva LC Resin Modified Glass Ionomer. Each group was subdivided into three subgroups according to storage time (n=6) at time intervals of 1 week, 1 month and 3 months. Control samples (3 teeth) were added representing normal untouched teeth for evaluating histological features of normal pulp. Paraffin sections were prepared stained with H&E then examined under light microscope for histologic evaluation of the inflammatory cell response according to the scoring system sugge...

Research paper thumbnail of An in vivo study on the clinical efficacy of resin infiltration technique on treatment of white spot lesions

Al-Azhar Journal of Dental Science

The caries infiltration technique was introduced with the aim of filling the intercrystalline spa... more The caries infiltration technique was introduced with the aim of filling the intercrystalline spaces with a low-viscosity resin, to arrest lesions and treat the esthetic problem of white spot lesions. This study was designed to evaluate the effect and clinical efficacy of resin infiltration technique on masking of enamel white spot lesions compared to an ordinary adhesive system. Methods: A total number of 20 patients having 120 not cavitated anterior teeth with white spot lesions were subjected to this study. After scaling, polishing and oral hygiene measures, the six maxillary anterior teeth were isolated with rubber dam. The teeth were divided into two groups, the first group (central incisor, lateral incisor and canine on right side of patient) was treated with hydrochloric acid (Icon-Etch) then ethanol (Icon-Dry) followed with application of resin (Icon-Infiltrant), while the second group: (central incisor, lateral incisor and canine on left side of the same patient) was treated with phosphoric acid (N-Etch) and adhesive (ExciTE F).Durability of used resins were clinically assessed by six of the FDI World Dental Federation criteria which were selected to be suitable for the current study (Surface luster, Surface Staining, Postoperative hyper-sensitivity, Recurrence of caries, Adjacent mucosa, and Patient's view), Each property has five grades from excellent to poor. Results: Both of treated groups showed improved surface luster, decreased postoperative hypersensitivity, diminished recurrent caries and increased patient satisfaction. Icon resin infiltration was more durable than Excite F adhesive after one year follow up. Both groups showed no initial surface staining, but with timesurface stainingbeing more with icon infiltrated group. Both materials have no effect on adjacent mucosa at different aging times. Conclusions: Icon resin infiltration is an effective treatment for deminiralized white spot lesions but with frequent repolishing to overcome surface staining for long lasting esthetic outcome. Excite F adhesive can be used only for short time sealing of enamel surface to improve the esthetics of white spot lesions and control of caries progression.

Research paper thumbnail of An in vivo study on the durability of resin infiltration technique on color masking of white spot lesions

Al-Azhar Journal of Dental Science

The caries infiltration technique was introduced with the aim of filling the intercrystalline spa... more The caries infiltration technique was introduced with the aim of filling the intercrystalline spaces with a low-viscosity resin, to arrest lesions and treat the esthetic problem of white spot lesions. This study was designed to evaluate the color effect and durability of resin infiltration technique on masking of enamel white spot lesions compared to an ordinary adhesive system. Methods: a total number of 20 patients having 120 not cavitated anterior teeth with white spot lesions were subjected to this study. The six maxillary anterior teeth were isolated with rubber dam. The teeth were divided into two groups, the first group (central incisor, lateral incisor and canine on right side of patient) was treated with hydrochloric acid (Icon-Etch) then ethanol (Icon-Dry) followed with application of resin (Icon-Infiltrate), while the second group: (central incisor, lateral incisor and canine on left side of the same patient) was treated with phosphoric acid (N-Etch) and adhesive (ExciTE F).Evaluation of color was done using VITA Easyshade V (VITA Germany) at the following intervals (pre-operative, immediate, one week, three months, six months and twelve months post-operatively). Results: the highest mean value of color change was found immediately post-operatively for icon resin infiltration group presented as positive (ΔL) and negative (ΔC) that means decrease in the whitish discoloration of teeth. Conclusions: Icon resin infiltration is an effective treatment for deminiralized white spot lesions, while Excite F adhesive can be used for short time sealing of enamel surface to improve the esthetics of white spot lesions.

Research paper thumbnail of Randomized Clinical Trial to Compare the Efficacy of Two Calcium Silicate Based Materials in Treatment of Deep Carious Lesion

Al-Azhar Journal of Dental Science

Objective: this study was directed to clinically and radiographically evaluate mineral trioxide a... more Objective: this study was directed to clinically and radiographically evaluate mineral trioxide aggregate (MTA) and TheraCal LC as indirect pulp capping (IPC) materials. Subjects and Methods: Twenty male patients aged 17-35 years with deep caires in class one in lower molars were randomly divided into two equal groups (n = 10). Group 1: pulp were capped using MTA. Group 2: pulp were capped using TheraCal LC. Clinical evaluation was performed at 1 week, 3, and 6 months after IPC for presence/ absence of spontaneous pain, tenderness to percussion, draining sinuses and pulp response to thermal pulp vitality test. Digital periapical radiographs were taken at 1 week, 3, and 6 months after IPC to evaluate the changes in the width of periodontal ligament space and presence/absence of periapical lesion. Results: Clinically, all cases showed criteria of successful treatment except 1case in each group. Statistical analysis revealed no statistically significant difference between both groups (P > 0.05). Radiographically, periapical lesions and the changes in the width of periodontal ligament space were not significantly different between both groups recording (P > 0.05). Conclusion: Clinically and radiographically, MTA and TheraCal LC are favorable materials for IPC.

Research paper thumbnail of A Comparative Study in Penetration Depth of Resin-Based Materials Into White Spot Lesion

This study conducts an in vitro comparison of the depth of penetration of a resin infiltrant mate... more This study conducts an in vitro comparison of the depth of penetration of a resin infiltrant material (Icon), a two-step self-etch resin-based material (OptiBond TM XTR), and a solvent-free self-etch resin-based material (Bond-1SF) into white spot lesions (WSLs). Methodology: Through an in vitro clinical trial, a total of 60 human posterior teeth, free from caries, were collected. The buccal and lingual surfaces of each tooth were marked, resulting in a total of 120 samples of surfaces, which represented the operational sample size. The samples were randomly divided into four equal main groups (n = 30) according to the materials used. Group 1 (M1) was the control group. Group 2 (M2) was restored using Icon, Group 3 (M3) using OptiBond TM XTR, and Group 4 (M4) using Bond-1SF. Each group was divided into two equal groups (n = 15) according to the surface treatment, and the first group (W1) was subjected to surface treatment but the second group (W2) was not. The resin penetration depth was observed using confocal laser scanning microscopy. Findings: The highest penetration depth was recorded for Group 2 with surface treatment (M2W1), and the lowest was recorded for Group 4 without surface treatment (M4W2). An analysis of variance test revealed a statistically significant difference in the penetration depth of tested materials (p < 0.05). Conclusion: Icon shows the best penetration depth value in relation to WSLs, whereas Bond-1SF shows the worst. Surface treatment has a positive effect on the penetration depth of the resin-based materials.

Research paper thumbnail of Effect of mouthwash and accelerated aging on the color stability of esthetic restorative materials

PubMed, Jun 1, 2000

Purpose: To evaluate the color stability of esthetic restorative materials after immersion in mou... more Purpose: To evaluate the color stability of esthetic restorative materials after immersion in mouthwashes and accelerated aging. Materials and methods: Compomers and resin-based composites (RBC) were measured at baseline and repeatedly after immersion in three kinds of mouthwash (Listerine, Peridex, Rembrandt Age Defying) for 24 hrs and 7 days, and after aging for 150 kJ/m2. Color was measured according to CIE L*a*b* color scale on a reflection spectrophotometer. Results: After immersion for 7 days, the mouthwash groups did not produce significantly higher color changes than the distilled water group, except with some mouthwashes used with Tetric-Ceram. After immersion for 7 days and aging for 150 kJ/m2, the mouthwash groups did not produce significantly higher color changes than the distilled water group. Aging in weathering chamber produced color change (deltaE*) of 1.1-3.9, which was mainly influenced by the material. With some exceptions, the color changes from immersion of the RBCs and compomers in mouthwashes were not perceptible (deltaE*<3.3).

Research paper thumbnail of Evaluation of biomimetic remineralization of demineralized enamel using different concentrations of Nano-complexes of phosphorylated chitosan and amorphous calcium phosphate

Al-Azhar Journal of Dental Science

Objective: This study was conducted to evaluate the remineralizing efficacy of biomimetic reminer... more Objective: This study was conducted to evaluate the remineralizing efficacy of biomimetic remineralization of demineralized enamel using different concentrations and different time of application of nanocomplexes phosphorylated chitosan-amorphous calcium phosphate on artificially induced enamel lesions using mineral content assessment (EDX) at different storage time. Material and methods: A total number of 40 bovine incisors from the second dentition were selected for this in vitro study. Teeth with cracks, caries were excluded. They were divided into two main groups (n = 20 each) according to the concentration of remineralizing agent. Each group was divided into two subgroups (n=10 each) according to time of application (2 minutes and 3 minutes). Results: The present study has shown that a statistically significant difference was found between demineralized specimens and all experimental groups. Specimens stored for three months showed the highest mean value of remineralization (the best result), while specimens stored for 1month showed the lowest mean value of remineralization, regardless to different concentration of remineralizing agents and their time of application. Conclusion: Nanocomplexes phosphorylated chitosan amorphous calcium phosphate is considered a precious biomimetic remineralizing agent. Storage time plays an important role during remineralizing process as mineral precipitation to tooth structure is a continuous dynamic process.

Research paper thumbnail of Evaluation of the effectiveness of three different desensitizing agents in dentinal tubule occlusion using scanning electron microscope

Al-Azhar Journal of Dental Science

Objective: This study was conducted to evaluate and compare the laboratory effect of three differ... more Objective: This study was conducted to evaluate and compare the laboratory effect of three different treatment modalities in dentinal tubules occlusion. Materials and methods: Total of (27) teeth were enrolled in the study. Dentin discs prepared from teeth to apply desensitizing agents evaluated through occluding dentinal tubules by scanning electron microscope (SEM) examination. Discs were used in the study which were randomly divided into three groups (n=9) according to desensitizing agent (D) used while D1: Gluma adhesive, D2: Citrene varnish and D3: Charm varinsh. Each group was divided into three sub groups(n=3) according to storage time (T) where T1: 1 week, T2: 1 months and T3: 3 months. Results: The results of this in-vitro study revealed that there was high significant difference (p ≤ 0.05) in percentage of dentinal tubules occlusion before and after treatment for all tested groups. Totally there was statistically significant difference (p ≤ 0.05) between the three groups as proven by Chi square test where Citrine varnish group was the highest followed by charm sense varnish group and the lowest was Gluma group in management of dentin hypersensitivity. Conclusions: Citrine varnish , Charm varnish and Gluma were effective in occluding dentinal tubules, with Citrine varnish being the most effective up to 3 months.

Research paper thumbnail of A Comparative Evaluation of the Efficacy of Three Different Treatment Modalities in Dentin Hypersensitivity Management (An In Vivo Study)

Objective : This study was conducted to evaluate the clinical effect of three different treatment... more Objective : This study was conducted to evaluate the clinical effect of three different treatment modalities in management of dentin hypersensitivity. patients and methods:Twenty seven hypersensitive teeth from nine patients were enrolled for this study. Patients were randomly divided into three groups according to desensitizing agents (Citrine varnish, Charm varnish and Gluma adhesive) . Patients assessment of dentin hypersensitivity was done before application of the agent (baseline) then 1 week, 4 weeks and 3 months respectively. Patients were asked to rate their perception to air stimuli by using and Visual Analogue Scale (VAS). Results: The results of this clinical study revealed that there was high significant difference (p ≤ 0.05) between pain scores before and after treatment for all tested groups. Totally there was statistically significant difference (p ≤ 0.05) between the three groups as proven by Chi square test where Citrine varnish group was the highest followed by cha...

Research paper thumbnail of Evaluation of The Degree of Remineralization of Subclinical Carious Lesions Using Chitosan and Conventional Remineralizing Agents (An in vitro Study)

The Egyptian Journal of Hospital Medicine, 2020

Background: Dental caries remains to be the most common oral disease, caused by the unbalance bet... more Background: Dental caries remains to be the most common oral disease, caused by the unbalance between demineralization effect of bacteria and remineralization process. In the early phase of caries, this balance can be restored and the demineralization effect reversed using an enhanced approach to remineralization. Objective: The aim of the study is directed to evaluate the degree of demineralization and remineralization in subclinical carious lesion using chitosan and conventional remineralizing agent. Materials and methods: A total number of 40 sound non-carious human anterior teeth were collected from oral surgery clinic, free of cracks and any developmental defects, were used in this study in age range (20-40) years old. Teeth were stored in distilled water at room temperature until use. The teeth were divided into four main groups (10 teeth each). Results: In the present study specimens treated with chitosan after six months storage time (the best result) recorded the highest mean value of remineralization while fluoride record the lowest mean value of remineralization (the worst result) through the remineralizing agents chitosan, casein, and fluoride. The specimens subjected to Diagnodent fluorescent reading proved that for all remineralizing agents (chitosan, casein and fluoride) and also control group the remineralization to tooth structure was increased by increasing the storage time. Conclusion: Chitosan is considered a valuable biomimetic remineralizing agent. Mineral precipitation to tooth structures by using remineralizing agents is a continuous dynamic process.

Research paper thumbnail of The Influence of Different Enamel Cavo-surface Configurations on the Marginal Leakage of Class V Composite Restorations using different adhesive systems

Purpose: This in vitro study investigated the effect of different cavosurface preparations: butt ... more Purpose: This in vitro study investigated the effect of different cavosurface preparations: butt joint; long bevel & scalloped bevel at both cervical and occlusal margins of class V composite restorations bonded with two currently used different adhesive systems Scotchbond Multipurpose Plus & PromptL-pop; after thermal and mechanical load cycling simulating one year of clinical service. Methods: Rectangular class V cavities on the buccal surfaces of 60 permanent lower molar teeth; with the occlusal margin in enamel just below the buccal deflection ridge; and the cervical margin just above the cemento-enamel junction. The teeth were randomly divided into three main groups (I; II & III) of 20 teeth each; according to the different cavosurface configurations. Each group was further subdivided into 2 subgroups (A & B) of 10 teeth each according to the type of bonding agent used. All cavities were restored using Z 250 composite resin. All specimens were thermo-cycled for 600 cycles; prio...

Research paper thumbnail of Nanoleakage Evaluation of Nano-Filled Resin Composite using Different Adhesive Systems at Different Dentin Depth

Objective: This study evaluated the nanoleakage of nano-filled resin composite using different ad... more Objective: This study evaluated the nanoleakage of nano-filled resin composite using different adhesive systems at different dentin depth. Material and Methods: A total of 120 freshly extracted human molars were used in this study. The selected teeth were randomly divided into two main groups according to adhesive system(self-etch and total etch), each main group were divided in to two groups according to dentin depth(superficial and deep dentin), each group were divided in to 3 sub-groups according to storage periods(24hours,3 months and 6 months). All the prepared cavities were restored incrementally using the nanofilled resin composite, then the specimens were immersed into silver nitrate and sectioned. Nanoleakage was measured. Results: The results showed that there was no statistically significant difference between self-etch and total etch according to the effect of adhesive system nor dentin depth on nanoleakage, while there was a statistically significant increase in median ...

Research paper thumbnail of The inflammatory response of pulp tissue after different direct pulp capping materials at different storage time

Al-Azhar Journal of Dental Science, 2021

Objective: Evaluate histologically and compare the inflammatory pulp response following direct pu... more Objective: Evaluate histologically and compare the inflammatory pulp response following direct pulp capping of mechanically exposed dogs' teeth with: Ca(OH)2 base Dycal, UltraBlend Plus and TheraCal LC, at different time intervals. Subjects and methods. A total of 54 permanent teeth of six healthy dogs were used. They were randomly divided into three groups (n=18) according to pulp capping material used. Group I: Dycal, Group II: UltraBlend Plus (UBP) and Group III: TheraCal LC. All cavities were restored with Riva LC Resin Modified Glass Ionomer. Each group was subdivided into three subgroups according to storage time (n=6) at time intervals of 1 week, 1 month and 3 months. Control samples (3 teeth) were added representing normal untouched teeth for evaluating histological features of normal pulp. Paraffin sections were prepared stained with H&E then examined under light microscope for histologic evaluation of the inflammatory cell response according to the scoring system sugge...

Research paper thumbnail of An in vivo study on the clinical efficacy of resin infiltration technique on treatment of white spot lesions

Al-Azhar Journal of Dental Science

The caries infiltration technique was introduced with the aim of filling the intercrystalline spa... more The caries infiltration technique was introduced with the aim of filling the intercrystalline spaces with a low-viscosity resin, to arrest lesions and treat the esthetic problem of white spot lesions. This study was designed to evaluate the effect and clinical efficacy of resin infiltration technique on masking of enamel white spot lesions compared to an ordinary adhesive system. Methods: A total number of 20 patients having 120 not cavitated anterior teeth with white spot lesions were subjected to this study. After scaling, polishing and oral hygiene measures, the six maxillary anterior teeth were isolated with rubber dam. The teeth were divided into two groups, the first group (central incisor, lateral incisor and canine on right side of patient) was treated with hydrochloric acid (Icon-Etch) then ethanol (Icon-Dry) followed with application of resin (Icon-Infiltrant), while the second group: (central incisor, lateral incisor and canine on left side of the same patient) was treated with phosphoric acid (N-Etch) and adhesive (ExciTE F).Durability of used resins were clinically assessed by six of the FDI World Dental Federation criteria which were selected to be suitable for the current study (Surface luster, Surface Staining, Postoperative hyper-sensitivity, Recurrence of caries, Adjacent mucosa, and Patient's view), Each property has five grades from excellent to poor. Results: Both of treated groups showed improved surface luster, decreased postoperative hypersensitivity, diminished recurrent caries and increased patient satisfaction. Icon resin infiltration was more durable than Excite F adhesive after one year follow up. Both groups showed no initial surface staining, but with timesurface stainingbeing more with icon infiltrated group. Both materials have no effect on adjacent mucosa at different aging times. Conclusions: Icon resin infiltration is an effective treatment for deminiralized white spot lesions but with frequent repolishing to overcome surface staining for long lasting esthetic outcome. Excite F adhesive can be used only for short time sealing of enamel surface to improve the esthetics of white spot lesions and control of caries progression.

Research paper thumbnail of An in vivo study on the durability of resin infiltration technique on color masking of white spot lesions

Al-Azhar Journal of Dental Science

The caries infiltration technique was introduced with the aim of filling the intercrystalline spa... more The caries infiltration technique was introduced with the aim of filling the intercrystalline spaces with a low-viscosity resin, to arrest lesions and treat the esthetic problem of white spot lesions. This study was designed to evaluate the color effect and durability of resin infiltration technique on masking of enamel white spot lesions compared to an ordinary adhesive system. Methods: a total number of 20 patients having 120 not cavitated anterior teeth with white spot lesions were subjected to this study. The six maxillary anterior teeth were isolated with rubber dam. The teeth were divided into two groups, the first group (central incisor, lateral incisor and canine on right side of patient) was treated with hydrochloric acid (Icon-Etch) then ethanol (Icon-Dry) followed with application of resin (Icon-Infiltrate), while the second group: (central incisor, lateral incisor and canine on left side of the same patient) was treated with phosphoric acid (N-Etch) and adhesive (ExciTE F).Evaluation of color was done using VITA Easyshade V (VITA Germany) at the following intervals (pre-operative, immediate, one week, three months, six months and twelve months post-operatively). Results: the highest mean value of color change was found immediately post-operatively for icon resin infiltration group presented as positive (ΔL) and negative (ΔC) that means decrease in the whitish discoloration of teeth. Conclusions: Icon resin infiltration is an effective treatment for deminiralized white spot lesions, while Excite F adhesive can be used for short time sealing of enamel surface to improve the esthetics of white spot lesions.