@article { author = {Mahmoud, Essraa A. and Niazy, Maha A and El Yasaky, Mohamed A}, title = {Evaluation of the Effect of Beverages on Wear Resistance and Microleakage of Class V Esthetic Restorations}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {319-326}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.19962}, abstract = {Aim: This study was carried out to evaluate the effect of beverages (orange juice and cola) on the wear resistance and microleakage of: Self cure Glass Ionomer, Flowable bulk fill composite and Packable bulk fill composite. Materials and Methods: Class V cavities were preparered on both the buccal and lingual sides, so a total of ninety cavities were created. Teeth were divided into three main groups according to the material used (30specimens each) (A). the first group was restored with the Riva self-cure glass ionomer (A1), the second group was restored by using flowalble bulk fill SDR, Dentsply (A2), while the third group was restored with packable bulk fill composite resin Filtek p 60 (A3). All Each group was further subdivided into three subgroups (Ten specimens each) (B). The specimens of the first subgroup were immersed in an orange juice for 5 minutes, 3x/day over a period of seven days and kept in artificial saliva between erosive cycles (B1). The specimens of the second subgroup were immersed in an acidic cola drink for 5 minutes, 3x/day over a period of seven days and kept in artificial saliva between erosive cycles (B2). The specimens of the third subgroup were immersed in a saline solution for 5 minutes, 3x/day over a period of seven days and kept in artificial saliva between erosive cycles to be used as control (B3). All specimens were thermocycled (5,00 cycles, 5°C-55°C). Results: Regardless to beverage media, it was found that Flowable bulk-fil composite (A2) group had the highest surface profile mean value followed by Packable bulk-fil composite (A3) group meanwhile Selfcure GI (A1) group had the lowest surface profile mean value. Also, irrespective of the material type, totally it was found that Cola (B2) immersed group recorded the highest surface profile mean values followed by Orange juice (B1) immersed group while Saline (B3) immersed group recorded the lowest surface profile mean value. So, it was found that the flowable composite had the highest surface profile roughness, and also the cola had the highest effect on all materials. Regardless to beverage media, totally it was found that Selfcure GI (A1) had the highest leakage score mean value followed by Packablebulk-fil composite (A3) group meanwhile Flowable bulk-fil composite (A2) group had the lowest leakage score mean. Meanwhile irrespective of the material type, it was found that Orange juice (A1) immersed group had the highest leakage score mean values followed by Cola (A2) immersed group while Saline (A3) immersed group had the lowest leakage score mean value.}, keywords = {Wear resistance,Microleak age,esthetic restorations}, url = {https://adjg.journals.ekb.eg/article_19962.html}, eprint = {https://adjg.journals.ekb.eg/article_19962_f47828cd13b28d4e8ae56a40d3ed3dbe.pdf} } @article { author = {Elasser, Dalia M. and Niazy, Maha A. and Elsharkawy, Doaa A.E and Mansour, Mai Sh}, title = {The Remineralizing Potential of Nano Bioactive Glass Versus Nanohydroxyapatite on Dentine as Affected by PH Cycling}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {327-334}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20017}, abstract = {Objective: The aim of this study was to evaluate the remineralizing potential of nano bioactive glass (BG) in comparison with nano hydroxy appetite (HA) incorporated into adhesive on demineralized dentine as affected by PH cycling.Materials and Methods: sixty sound premolars were extracted for orthodontic treatment. Class I Cavities were prepared in premolars with a depth 3mm. The specimens were divided into three treatment groups including 20%BG incorporated into self-etch adhesive (3M ESPE), 20% HA incorporated also into self-etch adhesive, and gel of sodium fluoride NaF was used as a positive control. 37% phosphoric acid was applied for each cavity for lesion creation. Modified adhesive and composite restoration were applied according to the manufacture instructions. An in vitro pH cycling model was used to mimic oral cavity condition through treatment solutions, acidic buffer (4 hours ) and neutral buffer(20 hours) for 30 days. The specimens were evaluated for radiodensity using Digital Radiographic (DBSW software) and Environmental Scanning Electron Microscope (ESEM) at different stages of the study (before demineralization, after demineralization and after remineralization). The significance level was set at p ≤0.05. Results: all groups showed significant reminerlization. Groups with BG nanoparticles and HA nanorods showed a higher increase in the radiodensty of demineralized dentine than NaF group. BG group showed higher results under neutral condition.Conclusion: BG and HA modified adhesives may be valuable tools to enhance remineralization of affected dentin.}, keywords = {Affected dentin,Bioactive glass,Hydroxyapatite,remineralization,fluoride,Nanoparticles}, url = {https://adjg.journals.ekb.eg/article_20017.html}, eprint = {https://adjg.journals.ekb.eg/article_20017_f87c04b59b9d6193d22617511ed2416e.pdf} } @article { author = {Fakhry Mlegy, Sara Mohamed and Kholief, Dina Mahmoud and Mohamed Kabeel, Shereen Mohamed}, title = {Effect of Different Denture Base Material on Electromyographic Activity in Maxillary Single Denture Wearers}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {335-340}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20018}, abstract = {Aim of study: was to evaluate and compare the effect of three different denture base material (heat cured acrylic resin, cast metal base and thermoplastic resin) on electromyographic activity of masseter and temporalis muscles in maxillary single denture wearers. Material and methods: Ten completely maxillary edentulous patients were selected with ages ranged from 55-60 years. All patients had received heat cured acrylic resin single maxillary complete denture (Group І) then replacing the denture base through rebasing procedures by cobalt chromium (Co-Cr) (Group ІІ) then thermoplastic resin material (Group ІІІ). All patients were instructed to use their resin dentures for equal periods of three months when EMG records of muscles of mastication (masseter and temporalis) were obtained at insertion then patient recalled after one month and at the end of three months , period of two week interval was left between each group as a washing period. Results: The results of this study showed that there were a significant differences between them, as the thermoplastic resin (group ІІІ) was the best followed by cobalt chromium denture (group ІІ) then heat cured acrylic resin denture base (group І) .Conclusion: EMG activity affected by maxillary denture base material as the lesser effort of masticatory muscles was done by using thermoplastic resin denture base rather than Co-Cr or acrylic resin denture base.}, keywords = {Denture base material,Electromyographic activity,Maxillary single denture}, url = {https://adjg.journals.ekb.eg/article_20018.html}, eprint = {https://adjg.journals.ekb.eg/article_20018_060e4e20b59b87049153e2d119127523.pdf} } @article { author = {El-Aziz Khater, Asmaa Adel Abd- and Niazy, Maha Ahmed and El-Aziz Gad, Nevin Abd-}, title = {The Effect of Poly Amido Amine Dendrimer, Gluteraldehyde and Their Combination on the Micro Hardness and Micromorphology of Demineralized Dentin}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {341-347}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20019}, abstract = {Objective: The aim of this study was to evaluate the remineralizing effect of Poly (amido amine) dendrimer, Gluteraldehyde and their combination on demineralized dentin at different time intervals. M ate rials and Methods: A total of one hundred and twenty dentin discs were prepared from extracted teeth (n=120), each dentin sample was immersed in 10% citric acid solution for 30 seconds. The samples were divided into two main groups (60 each) according to the assessment time, one week assessment, and four weeks assessment, These two groups were further subdivided into three groups according to the treatment materials; group (1), (n==10): pure G3.0 PAMAM dendrimer, group (II), (n=10): Gluteraldehyde was applied to the demineralized dentin, Group (III), (n=10): a combination of PAMAM dendrimer and Gluteraldehyde. Each group has its control group (n=10) which didn”t receive any treatment. Each treated group with its corresponding control one was placed in a separate container of artificial saliva for one and four weeks. The samples were subjected to microhardness test and Scanning Electron Microscope (SEM). Resu Its: after one week assessment, the results revealed that the highest mean value recorded for PAMAM group (10.9%) followed by PAMAMGluteraldehyde group (8.3%) while Gluteraldehyde group recorded the lowest mean value (5.26%). This difference was statistically insignificant. After four weeks assessment, the results revealed that the highest mean value recorded for PAMAM-Gluteraldehyde group (14.77%) followed by PAMAM group (14.34%) while Gluteraldehyde group recorded the lowest mean value (8%). This difference was statistically insignificant Conclusions: All treatment materials used were effective in increasing dentin microhardness and produced micromorphological changes of the dentin surface in terms of occluding the orificies of dentinal tubules to variable degree}, keywords = {caries,remineralization,PAMAM dendrimer,Gluteraldehyde,SEM,Microhardness}, url = {https://adjg.journals.ekb.eg/article_20019.html}, eprint = {https://adjg.journals.ekb.eg/article_20019_a3017f2ce6f32583445ce0be5e1dccb4.pdf} } @article { author = {Kamh, Raghda A. and Niazy, Maha A. and El-Yasaky, Mohamed A.}, title = {Clinical Performance and Remineralization Potential of Different Biomimitic Materials on White Spot Lesions}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {349-358}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20020}, abstract = {Aim: This study was designed to evaluate and compare the re-mineralization potential of different biomimetic materials; self assembling peptide (P11-4), highly concentrated sodium fluoride agent and combination of fluoride, hydroxyapatite and xylitol paste on the white spot lesions. Materials and Methods: This study was conducted on 45 white spot lesions. Each white spot lesion was scored according to severity using the ICDAS II criteria, then assigned into three groups of 15 lesions each according to the re-mineralizing material used; Group A1: 15 lesions were treated with Self assembling peptide (P11-4) (curodont repair), Group A2: 15 lesions were treated with highly concentrated sodium fluoride agent (Lunos® Polierpaste Two in One), Group A3: 15 lesions were treated with fluoride, hydroxyapatite and xylitol paste (Remin Pro forte). Saliva pH was checked every month for three months using CRT buffer. Photographic records were taken before treatment and after treatment then after three months. Patients were recalled after 1 month, 2 months and 3 months of re- mineralizing agents’ application. Data was presented as mean, median, standard deviation (SD). As most of the data was parametric, the differences between groups were evaluated by one way analysis of variance (ANOVA) test. This was followed by Tukey’s post hoc test when ANOVA yielded positive results. The level of significance was set at P < 0.05. Results: the mean percentage change in ICDAS II scores improved for all the three re- mineralizing agents used as compared to baseline. No significant difference was noted at baseline (p=0.54). However, at 3 months the difference between groups was statistically significant, since most of the cases in Remin Pro group recorded score 1 (66.6%), while most of the cases in Curodont and Lunos 2 in 1 group scored 2 (53.3% and 80% respectively). Score 0 recorded (20%) for Remin Pro while (13.3%) scored for Curodont. On the other hand, Lunos polier paste recorded no 0 score. According to Saliva buffer results; as a comparison between the three groups, pH of group (A3: Remin Pro forte) showed higher increase followed by group (A1: Curodont repair) then group (A2: Lunos polierpaste 2 in 1). Conclusions: All the tested materials have varying re-mineralization potential through Remin Pro forte was the most efficient. Self assembling peptides (P11-4) seem to believe in resisting the acid challenge. All agents were clinically efficient in management of white spot lesions}, keywords = {remineralization,White spot lesions,Curodont repair,Remin Pro,Polarized light microscope}, url = {https://adjg.journals.ekb.eg/article_20020.html}, eprint = {https://adjg.journals.ekb.eg/article_20020_3e91ee8942479c0edc96cec38e49a98f.pdf} } @article { author = {Zidan, Yasmin Seif Eldeen and Gamal El-Din, Hala Mohammad and Kholief, Dina Mahmoud}, title = {Effect of Occlusal Reactive and Thermoplastic Denture Bases on Supporting Structures in Lower Distal Extension Partial Dentures}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {359-364}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20021}, abstract = {Aim of study: was to evaluate and compare the effect of occlusal reactive versus thermoplastic partial denture bases on the supporting alveolar structure of mandibular distal extension partial dentures cases. Materials and methods: Ten partially edentulous patients were precisely selected to avoid factors that may adversely affect the results of this study. Removable partial dentures were constructed for all patients following the same procedures and the same design. According to denture base material the selected patients were randomly divided into two equal groups: Group I: five patients received cobalt-chromium partial denture with thermoplastic denture base. Group II: five patients received cobalt-chromium partial denture with occlusal reactive base. The patients were evaluated both clinically and radiographically, clinical assessment of the abutment was carried out through measuring its pocket depth, while radiographic assessment was done by recording bone height change distal to abutment teeth and bone high change of the residual ridge. Results: The results of this study showed that there were a significant differences between flexible and occlusal reactive bases on their effect on supporting structures. Conclusion: The occlusal reactive base exhibited better effect than flexible base regarding bone resorption in abutment as well as residual ridge}, keywords = {Distal extension base,Occlusal reactive,Thermoplastic partial denture,Pocket depth,Bone height}, url = {https://adjg.journals.ekb.eg/article_20021.html}, eprint = {https://adjg.journals.ekb.eg/article_20021_d90c65d4cc268b8efbf938f602484b17.pdf} } @article { author = {Salah El-Din, Mai Mohamed and Nour El-Din, Mohsen and Mohamed, Mahmoud Hassan}, title = {Evaluation of the effect of endodontic chelating solutions on push out bond strength of endodontic sealers (An in-vitro study)}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {365-372}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20022}, abstract = {Aim: This study was carried out to evaluate the effect of various chelating solutions (EDTA-Apple Vinegar-Sodium Hypochlorite)on the radicular push-out bond strength of zinc oxide nanosealer and AH Plus resin based rootcanal sealer. Materials and Methods: 180 extracted single-rooted human teeth with complete roots, fully formed apices were used in this study,on completion of instrumentation, the specimens will be randomly divided into three groups (n=60) according to chelating solution applied: Group ( I ) 1.5 mL of 17% EDTA (pH = 7), Group ( II ) 2.5 mL of vinegar apple and Group ( III ) 2 mL of 5.25% sodium hypochlorite (NaOCl). These groups are subdivided into two subgroups (n=30) each according to root canal sealer used: Subgroup A: AH Plus and Subgroup B: Zinc oxide nanosealer. Then the specimens in the subgroups will be further randomly divided into two groups (n=15) according to storage time: Subgroup 1:one week storage time and Subgroup 2: one month storage time The root canals were prepared using ProTaper rotary instruments up to master apical rotary size F3 (#30), in conjunction with 2 mL of Normal saline solution (Sodium Chloride 0.9%) irrigation between each file and the chelating solution was applied for 1 minute then final rinse with distilled water. The sealers were loaded and introduced to the canal using K file size40.Testing push-out bond strength was done for all samples using the Intrson universal testing machine. Results: It was found that the highest push-out bond strength mean value recorded for (EDTA+ AH Plus) (1 week) group (IA1) (3.424 MPa) followed by (Apple Vinegar+ AH Plus) (1 week) group (IIA1) (1.263 MPa) while the lowest mean value recorded for (NaOCl+ZnO nanosealer) (1 month) group (IIIb2) (0.575 MPa). The difference between different groups was statistically significant as revealed with one way ANOVA test (p<0.05). Tukey’s post-hoc test showed non-significant (p>0.05) differences between {(Apple Vinegar+AH Plus) and (NaOCl +AH Plus) (1 week)}, {( EDTA+ AH Plus), (Apple Vinegar+ AH Plus) and(NaOCl+ AH Plus) (1 month)}, {(EDTA+ ZnO nanosealer) and (NaOCl+ ZnO nanosealer) (1 month)}. Conclusions: AH Plus sealer had the highest push-out bond strength when used with EDTA, ZnO nanosealer had the highest push –out when used with apple vinegar and all AH Plus subgroups had higher push-out bond strength than ZnO nanosealers subgroups}, keywords = {AH Plus,ZnO nanosealer,Push-out bond strength}, url = {https://adjg.journals.ekb.eg/article_20022.html}, eprint = {https://adjg.journals.ekb.eg/article_20022_e6e2522ca79797f3620bb2cac7b29183.pdf} } @article { author = {EL Mofty, May H. and Ibrahim, Samir A and EL-Shall, Ossama S. and Tawfik, Wael A.}, title = {Evaluation of Dentoskeletal Changes Accompanying the Treatment of Class II Malocclusion by Advansync Appliance versus Intermaxillary Coil Spring Mechanics}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {373-383}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20023}, abstract = {Objectives: The present study was designed to determine and compare the skeletal, dentoalveolar and soft tissue effects produced by the Advansync functional appliance and intermaxillary NiTi coil springs in the treatment of growing patients with Class II division 1 malocclusion. Subjects and methods: A sample of 19 growing patients, as evaluated by hand wrist radiographs, with age range 12-15 years was divided into two groups. Group I patients were treated with the Advansync appliance (n=10) and Group II patients were treated using intermaxillary NiTi coil springs (n=9). The study was conducted using lateral cephalograms taken before appliance insertion and immediately after appliance removal. Treatment changes were evaluated for each group and compared between both groups. Data were analyzed using Paired sample t-test for each group and Independent t-test for comparing groups together. Results: The use of Advansync and fixed appliances (Group I) resulted in significant decrease in SNA and ANB angles (p≤0.001). Dental changes included retroclination of maxillary teeth, proclination and intrusion of mandibular teeth as well as mesialization of mandibular molars (p≤0.001). On the other hand, SNA and ANB showed non-significant changes for patients treated with intermaxillary NiTi coil springs (Group II) (p≥0.05). While dental changes included retroclination of maxillary teeth, proclination and intrusion of mandibular teeth as well as mesialization of mandibular molars (p≤0.001) which were greater in Group II than Group I. The effects of both treatment modalities showed significant increases in total mandibular length and anterior facial height (p≤0.01 and p≤0.05) with no significant difference between both groups. Lower lip to PtV was theonly soft tissue measurement with significant changes (p≤0.05) for each group and was non-significant when the two groups were compared together. Conclusion: Both treatment modalities were effective in treating Class II division 1 malocclusion. The Advansync appliance produced its effect through maxillary growth restriction and dentoalveolar changes. While the effects of intermaxillary NiTi coil springs were only dentoalveolar, but more than the Advansync appliance.}, keywords = {class II division 1,Advansync,intermaxillary coil springs,fixed functional appliances}, url = {https://adjg.journals.ekb.eg/article_20023.html}, eprint = {https://adjg.journals.ekb.eg/article_20023_37fcd7cb1452d87e897c3bd06d674f25.pdf} } @article { author = {Gadallah, Aliaa F. and Motawea, Inas T. and Bayoumi, Rania E.}, title = {Evaluation of the effect of saliva contamination and cleaning methods on the surface free energy and shear bond strength of resin cements to zirconia ceramics}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {385-398}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20024}, abstract = {Objective: This study was designated to evaluate the effect of saliva contamination and cleaning methods on the surface free energy and the shear bond strength of resin cement to zirconia ceramics. Materials and Methods: A total of 80 samples were copy milled (CAD/CAM) from Zirconia blank. The samples were randomly divided into (4) groups (n=20) according to method of cleaning. Group 1 (control): No saliva contamination,Group 2: The samples cleaned with distilled water,Group 3: The samples cleaned with ivoclean, Group4:The samples cleaned with re-sandblasting. Each group was subdivided into 2 subgroups according to the type of adhesive resin cement (Multilink Speed and RelyX Ultimate) used (n=10). Each subgroup was further subdivided into two divisions according to the type of test (surface free energy and bond strength) performed (n=5). One-way analysis of variance ANOVA test and Tukey’ post hoc test were done for comparing variables. Results: The control groups record the lowest mean contact angle value (25.81°±1.76°) and the highest mean surface free energy value (107.57mN/m). While the group washed with water revealed the highest mean contact angle value (39.04°±0.68°) and the lowest mean surface free energy value (98.58 mN/m). Regarding shear bond strength the results showed that the highest shear bond strength value was recorded for the control group (14.33±1.98& 13.73±1.33 MPa), for Multi-link speed and Rely-X ultimate cement respectively , followed by re-sandblasting group, followed by ivoclean group, while the lowest shear bond strength value was recorded for the group washed with water (10.9±0.53& 8.22±0.85 MPa). However, regardless of the cleaning protocol groups, Multi-link speed cement recorded a higher mean shear bond strength value than RelyX Ultimate cement. However these difference was statistically non-significant except for the group washed with water (p=0.0003) as indicated by unpaired t test. Failure modes for all groups were evaluated, failure modes was either adhesive, cohesive or mixed, with frequency ranging from 20 to 40% for each type of failure. The group washed with water showed that allof cases of failure were of the adhesive type in both cement (100%). Conclusion: Cleaning of the contaminated ceramic surface before adhesive cementation is an indispensable step in order to achieve a strong bond. Moreover, the removal of surface contaminants by sandblasting and Ivoclean paste can be considered efficient cleaning methods for zirconia surfaces}, keywords = {(CAD/CAM) zirconia ceramics,surface free energy,Shear bond strength}, url = {https://adjg.journals.ekb.eg/article_20024.html}, eprint = {https://adjg.journals.ekb.eg/article_20024_98046e667a6416442e36616e1a857495.pdf} } @article { author = {D.A., Elsharkawy}, title = {Effect of Incorporation of Bioactive Glass Nano Particles in Adhesive Resin On Microtensile Bond Strength to Dentin in Self Etch and Etch and Rinse Mode}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {399-404}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20025}, abstract = {Objectives: This study aimed to evaluate the effect of addition of bioactive glass nano particles to an adhesive resin on the microtensile bond strength to dentin in etch and rinse and self-etch mode. Materials and methods: bioactive glass nano particles were prepared and added to a universal adhesive (Single Bond Universal, 3M ESPE) in concentrations of 10% and 20% by wt. 48 dentin specimens were prepared from human sound molars. The occlusal enamel was removed to expose dentin and the specimens were divided into six groups of 8, A1 and B1, received unmodified adhesive, A2 and B2 received adhesive with 10% bioactive glass and A3 and B3 received adhesive with 20% bioactive glass respectively. A groups were bonded using the etch and rinse approach while theB groups were bonded using the self-etch groups. Composite resin was applied to the bonded surfaces. Specimens were sectioned for microtensile bond strength testing. Results: the addition of bioactive glass fillers caused a significant reduction to the microtensile bond strength when compared to dentin with both adhesive techniques. The amount of filler had no significant effect on the self-etch mode, while with the etch and rinse there was a further significant reduction with added filler. Conclusion: addition of bioactive nano fillers caused a significant weakening of the bond strength.}, keywords = {microtensile bond strength,Bioactive glass,Nano fillers}, url = {https://adjg.journals.ekb.eg/article_20025.html}, eprint = {https://adjg.journals.ekb.eg/article_20025_0a970ccc14d844404fab943a16178318.pdf} } @article { author = {Kabeel, Shereen M and Kholief, Dina M}, title = {Electromyographic Evaluation of Jaw Muscles in Edentulous Patients with Implant-Supported Prosthesis}, journal = {Al-Azhar Dental Journal for Girls}, volume = {5}, number = {4}, pages = {405-412}, year = {2018}, publisher = {Al-Azhar University, Faculty of Dental Medicine, Girls Branch}, issn = {2537-0308}, eissn = {2537-0316}, doi = {10.21608/adjg.2018.20026}, abstract = {The purpose of this study was to evaluate the effect of implant-supported oral rehabilitation in the mandible on the electromyographic (EMG) activity during chewing in completely edentulous individuals. Material and methods: Twelve completely edentulous patients were selected for this study, being six females and six males, aged 55 to 65 years old. The patients were divided into three groups according to the treatment protocol; (GI) All the completely edentulous patients had conventional maxillary and mandibular complete denture, (GII) six patients had two mandibular implants supported overdenture at the canine region and (GIII) six patients had one mandibular implant supported over-denture at the symphesial area. All patients were submitted to EMG evaluation of the masseter, and the temporalis muscles, after three months of placement of the conventional prosthesis and after three months of both implant-supported systems by using different textures of foods. The recordings data were analyzed using One Way ANOVA followed by post hoc analysis using LSD test.P< 0.05 was considered statistically significant. Results: the highest EMG activity of the masseter and temporalis muscles was recorded by chewing soft and hard foods in GI, while the reduction of muscular activity after implant supported oral rehabilitation was seen. No significant differences in the analyzed EMG parameters were found between the patients in GII and GIII. Conclusion: mandibular implant-supported prosthesis in edentulous individuals revealed a decrease in EMG amplitude for the masseter and temporalis muscles during chewing, which may indicate adaptation to new conditions of stability provided by support of the complete denture in the mandibular arch}, keywords = {mastication,Implant-supported prostheses,electromyography}, url = {https://adjg.journals.ekb.eg/article_20026.html}, eprint = {https://adjg.journals.ekb.eg/article_20026_c19d0368e955fa6b75bc5cdc0af7c3d4.pdf} }