Hussein Yehia - Academia.edu (original) (raw)

Papers by Hussein Yehia

Egyptian Dental Journal, 2016

The aim was to measure the microshear bond strength of composite resin bonded to dentin by one so... more The aim was to measure the microshear bond strength of composite resin bonded to dentin by one solvent free self-etch, Bond-1 SF and two solvent containing adhesives, Futurabond DC and Adper Easy One and study the resin-dentin morphological interface by scanning electron microscope. Materials and methods: 30 caries free third molars were used to prepare specimens of dentin surfaces. The adhesives were applied on dentin surfaces according to the manufacturer's instructions then Grandio-SO Composite resin was condensed through a polyethylene tube with a 0.7mm internal diameter and 0.9mm height attached firmly to dentin surfaces and light cured. The bonded specimens were stored in distilled water at 37°C for 24 h before being tested. All specimens were thermocycled in water baths held at 5°c and 55°c with a dwell time of 1 min each for 5000 cycles. The microshear bond strength was measured by using universal testing machine at cross head speed of 0.5 mm/min. To evaluate the resin dentin interface, 15 dentin slices were prepared, with five slices for each adhesive, a resin composite with each adhesive were placed 2mm thick to form composite core. The segments were sectioned longitudinally and prepared to be examined under scanning electron microscope. Result: Adper Easy One solvent containing adhesive recorded the highest mean value of bond strength followed by Bond-1 solvent free, while Futurabond DC solvent containing recorded the lowest mean value.

Egyptian Dental Journal, 2021

Objective: to evaluate the efficacy of non-invasive procedures through biomimetic mineralization ... more Objective: to evaluate the efficacy of non-invasive procedures through biomimetic mineralization of a fluoride, bioactive glass with and without fluoride and self-organizing peptides in the treatment of dentinal hypersensitivity due to early non-carious cervical lesions. Materials and methods: Twenty-eight patients with self-reported history of dentin hypersensitivity were evaluated sequentially for evidence of erosion, abrasion or gingival recession at facial cervical region. Patients were randomly distributed into four treatment groups of seven patients each according to the type of the treatment (group I: Elmex Gele'e, group II: BioMin™ F, group III: BioMin™ C group IV: Curodont TM D'senz). The teeth were subjected to five follow up periods (baseline, after 3,6,9 and 12 weeks) and assessed in response to evaporative air-blast stimulus utilizing Schiff Sensitivity Scale and Visual Analogue Scale. Electrical test was performed utilizing electrical pulp tester. The extent of tubule occlusion was examined under scanning electron microscope using negative replica of randomly selected patients. Results: All the tested groups showed different degrees of relieving dentinal hypersensitivity symptoms with significant difference throughout the different assessment periods. The difference between the studied groups was statistically significant. Under SEM, group II, III and IV showed complete tubule occlusion. However, group I showed partial tubule occlusion. Conclusions: Elmex® gelée, BioMin™ F, BioMin™ C and Curodont™ D'senz were effective to manage dentin hypersensitivity related to early non-carious cervical lesions based on the biomimetic mineralization concept that has focused on permanent management of dentin hypersensitivity.

Tanta Dental Journal, 2018

Purpose The aim was to evaluate and compare the marginal seal of Class V composite restored with ... more Purpose The aim was to evaluate and compare the marginal seal of Class V composite restored with different cavosurface margins. Materials and methods A standardized Class V cavity, 4 mm wide, 3 mm high, and 3 mm deep, were prepared on the buccal surface of 60 extracted molars with the occlusal margin located in enamel and the gingival margin located in dentin-cementum 1.0 mm below the cementoenamel junction. The teeth were divided into two main groups: group I, cavosurface angle was 90° butt-joint; group II, beveled enamel and dentin cavosurface margins. Each group subdivided into three subgroups: group A, restored with Filtek bulk-fill flowable composite. Group B, restored with Filtek bulk-fill posterior composite. Group C, restored with Filtek Z250XT Universal composite. Restorations were cured with LED light curing unit. All specimens were stored in 37°C and 100% humidity for 24 h, thermo cycled for 600 cycles with baths held between 5 and 55°C, a dwell time of 30 s and a transfer time of 10 s. The restored coronal portion were cut 3 mm beyond the cementoenamel junction, each specimen were sectioned in bucco–lingual direction through the center of each restoration resulting in two sections. The cut surfaces were examined at the occlusal and gingival margins using a stereomicroscope at 30× magnification with an attached digital camera. Results There was significant difference in microleakage between the three tested materials where flowable bulk-fill showed a lower degree of microleakage than posterior bulk-fill and conventional composite at P value of less than 0.05 and there was a degree of significant in microleakage at occlusal and gingival margin where occlusal margins showed the a lowest degree of microleakage. Conclusion There was significant inverse correlation between flowable bulk-fill and conventional composite and high significant between occlusal and gingival margin and there is no need for a bevel in Class V carious lesions.

American journal of dentistry, 2008

To evaluate the effect of pulpal pressure on the microtensile bond strength of four self-etch adh... more To evaluate the effect of pulpal pressure on the microtensile bond strength of four self-etch adhesives to dentin. A total-etch adhesive was added for comparison. 60 freshly extracted human third molars were selected. For each tooth, the root was removed below the cemento-enamel junction. A second parallel section was made to remove the coronal enamel to form a crown segment. The root portion of the resulting crown segment was cemented to a Plexiglas platform using cyanoacrylate cement. The crown segment was then connected with a plastic tube to a water column to produce a pressure of 20 cm H2O at the prepared dentin surface of the crown segment. The adhesive materials were: a total-etch adhesive (Scotchbond 1) and four self-etch adhesives (Clearfil SE Bond, Hybrid Bond, Futurabond NR, and AdheSE Bond). The tested adhesives were applied to the dentin surface in three test procedures: applied to dentin without pulpal pressure, applied to dentin with pulpal pressure for 24 hours, and ...

Tanta Dental Journal, 2014

Purpose: To evaluate effect of water storage on micro-shear bond strength of adhesives to class I... more Purpose: To evaluate effect of water storage on micro-shear bond strength of adhesives to class I cavity-bottom dentin using two types of composites resin. Materials and methods: Ninety teeth were divided into three groups I,II&III (thirty molars each) according to the adhesive used, either total-etch 2-step (Adper Single Bond, 3M ESPE), self-etch 2-step(Clearfil SE Bond, Kuraray), or self-etch 1-step(Futura Bond, Voco) respectively. Each group was subdivided according to type of composite restoration used, either Hybrid (Clearfil APX, Kuraray), and Packable (Filtek P60, 3M ESPE). All teeth were thermocycled for 500 cycles,and subjected to occlusal load cycling for 120.000 cycles corresponding to 6 months clinical use. Bonding effectiveness was assessed by micro-shear bond strength test (mSBS) after 1 day, 3 months, and 6 months water storage.

Tanta Dental Journal, 2018

Objectives Evaluate the color regression, postoperative sensitivity, and patient's satisfacti... more Objectives Evaluate the color regression, postoperative sensitivity, and patient's satisfaction after bleaching with different regimens over a period of 1 year clinical service. Participants and methods Twenty highly educated adolescents (age range: 18–25 years) seeking for better esthetics were enrolled into the study. Their teeth shade was A3 or darker. Participants were enrolled in a split mouth study design divided into four groups according to bleaching materials and/or desensitizer used. Groupgroup I: right mandibular anterior teeth will receive over-the-counter (OTC) bleaching material followed by desensitizer application. Group II: left mandibular anterior teeth will receive OTC bleaching material. Group III: right maxillary anterior teeth will receive in-office bleaching material followed by desensitizer usage. Group IV: left maxillary anterior teeth will receive in-office bleaching material. The color change, teeth sensitivity and patient's satisfaction were recorded along the evaluation periods at baseline, before any treatment, directly after bleaching, and in 3 months intervals for a year postoperatively. Results One-way repeated measure analysis of variance test was performed to investigate the effect of time on the color change for each tested group. A highly significant difference was recorded regarding the color change for all tested groups with P value equals 0.000. Considerable postoperative sensitivity was recorded in 13.3, 36.7, 1.7, and 30% for group I, II, III, IV, respectively. Treatments were generally well-tolerated, a percentage of zero (n = 0) patient terminated the treatment prematurely. There was no postoperative hypersensitivity at any tooth after 3, 6, 9, and 12 months evaluation periods. Additionally, after 1 year evaluation periods, five (25%) patients recorded moderately satisfaction, nine (45%) patients were satisfied, and six (30%) patients were extremely satisfied with their teeth color. Conclusion and recommendations The degree of whitening is superior in the power bleaching compared with the OTC bleaching technique. The higher incidence of tooth sensitivity was found in teeth bleached using OTC technique. It is recommended that over-the-counter products should be used under strict manufacturer's directions.

Egyptian Dental Journal, 2016

The aim was to measure the microshear bond strength of composite resin bonded to dentin by one so... more The aim was to measure the microshear bond strength of composite resin bonded to dentin by one solvent free self-etch, Bond-1 SF and two solvent containing adhesives, Futurabond DC and Adper Easy One and study the resin-dentin morphological interface by scanning electron microscope. Materials and methods: 30 caries free third molars were used to prepare specimens of dentin surfaces. The adhesives were applied on dentin surfaces according to the manufacturer's instructions then Grandio-SO Composite resin was condensed through a polyethylene tube with a 0.7mm internal diameter and 0.9mm height attached firmly to dentin surfaces and light cured. The bonded specimens were stored in distilled water at 37°C for 24 h before being tested. All specimens were thermocycled in water baths held at 5°c and 55°c with a dwell time of 1 min each for 5000 cycles. The microshear bond strength was measured by using universal testing machine at cross head speed of 0.5 mm/min. To evaluate the resin dentin interface, 15 dentin slices were prepared, with five slices for each adhesive, a resin composite with each adhesive were placed 2mm thick to form composite core. The segments were sectioned longitudinally and prepared to be examined under scanning electron microscope. Result: Adper Easy One solvent containing adhesive recorded the highest mean value of bond strength followed by Bond-1 solvent free, while Futurabond DC solvent containing recorded the lowest mean value.

Egyptian Dental Journal, 2021

Objective: to evaluate the efficacy of non-invasive procedures through biomimetic mineralization ... more Objective: to evaluate the efficacy of non-invasive procedures through biomimetic mineralization of a fluoride, bioactive glass with and without fluoride and self-organizing peptides in the treatment of dentinal hypersensitivity due to early non-carious cervical lesions. Materials and methods: Twenty-eight patients with self-reported history of dentin hypersensitivity were evaluated sequentially for evidence of erosion, abrasion or gingival recession at facial cervical region. Patients were randomly distributed into four treatment groups of seven patients each according to the type of the treatment (group I: Elmex Gele'e, group II: BioMin™ F, group III: BioMin™ C group IV: Curodont TM D'senz). The teeth were subjected to five follow up periods (baseline, after 3,6,9 and 12 weeks) and assessed in response to evaporative air-blast stimulus utilizing Schiff Sensitivity Scale and Visual Analogue Scale. Electrical test was performed utilizing electrical pulp tester. The extent of tubule occlusion was examined under scanning electron microscope using negative replica of randomly selected patients. Results: All the tested groups showed different degrees of relieving dentinal hypersensitivity symptoms with significant difference throughout the different assessment periods. The difference between the studied groups was statistically significant. Under SEM, group II, III and IV showed complete tubule occlusion. However, group I showed partial tubule occlusion. Conclusions: Elmex® gelée, BioMin™ F, BioMin™ C and Curodont™ D'senz were effective to manage dentin hypersensitivity related to early non-carious cervical lesions based on the biomimetic mineralization concept that has focused on permanent management of dentin hypersensitivity.

Tanta Dental Journal, 2018

Purpose The aim was to evaluate and compare the marginal seal of Class V composite restored with ... more Purpose The aim was to evaluate and compare the marginal seal of Class V composite restored with different cavosurface margins. Materials and methods A standardized Class V cavity, 4 mm wide, 3 mm high, and 3 mm deep, were prepared on the buccal surface of 60 extracted molars with the occlusal margin located in enamel and the gingival margin located in dentin-cementum 1.0 mm below the cementoenamel junction. The teeth were divided into two main groups: group I, cavosurface angle was 90° butt-joint; group II, beveled enamel and dentin cavosurface margins. Each group subdivided into three subgroups: group A, restored with Filtek bulk-fill flowable composite. Group B, restored with Filtek bulk-fill posterior composite. Group C, restored with Filtek Z250XT Universal composite. Restorations were cured with LED light curing unit. All specimens were stored in 37°C and 100% humidity for 24 h, thermo cycled for 600 cycles with baths held between 5 and 55°C, a dwell time of 30 s and a transfer time of 10 s. The restored coronal portion were cut 3 mm beyond the cementoenamel junction, each specimen were sectioned in bucco–lingual direction through the center of each restoration resulting in two sections. The cut surfaces were examined at the occlusal and gingival margins using a stereomicroscope at 30× magnification with an attached digital camera. Results There was significant difference in microleakage between the three tested materials where flowable bulk-fill showed a lower degree of microleakage than posterior bulk-fill and conventional composite at P value of less than 0.05 and there was a degree of significant in microleakage at occlusal and gingival margin where occlusal margins showed the a lowest degree of microleakage. Conclusion There was significant inverse correlation between flowable bulk-fill and conventional composite and high significant between occlusal and gingival margin and there is no need for a bevel in Class V carious lesions.

American journal of dentistry, 2008

To evaluate the effect of pulpal pressure on the microtensile bond strength of four self-etch adh... more To evaluate the effect of pulpal pressure on the microtensile bond strength of four self-etch adhesives to dentin. A total-etch adhesive was added for comparison. 60 freshly extracted human third molars were selected. For each tooth, the root was removed below the cemento-enamel junction. A second parallel section was made to remove the coronal enamel to form a crown segment. The root portion of the resulting crown segment was cemented to a Plexiglas platform using cyanoacrylate cement. The crown segment was then connected with a plastic tube to a water column to produce a pressure of 20 cm H2O at the prepared dentin surface of the crown segment. The adhesive materials were: a total-etch adhesive (Scotchbond 1) and four self-etch adhesives (Clearfil SE Bond, Hybrid Bond, Futurabond NR, and AdheSE Bond). The tested adhesives were applied to the dentin surface in three test procedures: applied to dentin without pulpal pressure, applied to dentin with pulpal pressure for 24 hours, and ...

Tanta Dental Journal, 2014

Purpose: To evaluate effect of water storage on micro-shear bond strength of adhesives to class I... more Purpose: To evaluate effect of water storage on micro-shear bond strength of adhesives to class I cavity-bottom dentin using two types of composites resin. Materials and methods: Ninety teeth were divided into three groups I,II&III (thirty molars each) according to the adhesive used, either total-etch 2-step (Adper Single Bond, 3M ESPE), self-etch 2-step(Clearfil SE Bond, Kuraray), or self-etch 1-step(Futura Bond, Voco) respectively. Each group was subdivided according to type of composite restoration used, either Hybrid (Clearfil APX, Kuraray), and Packable (Filtek P60, 3M ESPE). All teeth were thermocycled for 500 cycles,and subjected to occlusal load cycling for 120.000 cycles corresponding to 6 months clinical use. Bonding effectiveness was assessed by micro-shear bond strength test (mSBS) after 1 day, 3 months, and 6 months water storage.

Tanta Dental Journal, 2018

Objectives Evaluate the color regression, postoperative sensitivity, and patient's satisfacti... more Objectives Evaluate the color regression, postoperative sensitivity, and patient's satisfaction after bleaching with different regimens over a period of 1 year clinical service. Participants and methods Twenty highly educated adolescents (age range: 18–25 years) seeking for better esthetics were enrolled into the study. Their teeth shade was A3 or darker. Participants were enrolled in a split mouth study design divided into four groups according to bleaching materials and/or desensitizer used. Groupgroup I: right mandibular anterior teeth will receive over-the-counter (OTC) bleaching material followed by desensitizer application. Group II: left mandibular anterior teeth will receive OTC bleaching material. Group III: right maxillary anterior teeth will receive in-office bleaching material followed by desensitizer usage. Group IV: left maxillary anterior teeth will receive in-office bleaching material. The color change, teeth sensitivity and patient's satisfaction were recorded along the evaluation periods at baseline, before any treatment, directly after bleaching, and in 3 months intervals for a year postoperatively. Results One-way repeated measure analysis of variance test was performed to investigate the effect of time on the color change for each tested group. A highly significant difference was recorded regarding the color change for all tested groups with P value equals 0.000. Considerable postoperative sensitivity was recorded in 13.3, 36.7, 1.7, and 30% for group I, II, III, IV, respectively. Treatments were generally well-tolerated, a percentage of zero (n = 0) patient terminated the treatment prematurely. There was no postoperative hypersensitivity at any tooth after 3, 6, 9, and 12 months evaluation periods. Additionally, after 1 year evaluation periods, five (25%) patients recorded moderately satisfaction, nine (45%) patients were satisfied, and six (30%) patients were extremely satisfied with their teeth color. Conclusion and recommendations The degree of whitening is superior in the power bleaching compared with the OTC bleaching technique. The higher incidence of tooth sensitivity was found in teeth bleached using OTC technique. It is recommended that over-the-counter products should be used under strict manufacturer's directions.