Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Antibacterial Effect of Ginger, Green Tea and Pomegranate versus Chlorhexidine using Stevia and Sucrose Sugar32933610021410.21608/adjg.2020.7838.1105ENHagar A.Abdel TawabDentist at Ministry of Health, Egypt.Maha A.NiazyProfessor of operative dentistry Department, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, EgyptDoaa A.El ElsharkawyAssistant professor of Operative Dentistry Department, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt0000-0002-5165-8297Journal Article20190220Purpose: To evaluate the antibacterial activity of three natural plant extracts (Ginger, Green tea and Pomegranate peel) versus Chlorhexidine using Sucrose and Stevia Sugar. Materials and Methods: extracts of the three natural materials were prepared where an aqueous extract of green tea was prepared by boiling, and pomegranate peel and ginger were extracted using ethyl alcohol. Carious dentin samples were obtained from carious permanent molars. Streptococcus mutans were isolated and identified. The extracts were compared to chlorohexidine using either no sugar, sucrose or stevia sugar. Antibacterial activity was assessed through the inhibition zone, bacterial count and metabolic activity. Ginger, pomegranate peel, green tea extracts, and chlorohexidine were individually tested against the S. mutans. Inhibition zone test was done by the agar well diffusion method. Then, Colony forming units were counted. MIC of tested extracts was determined by a MTT micro-well dilution method. The results were statistically analyzed and the significance level was set at p ≤0.05. Results: All groups showed a significant antibacterial effect. Chlorhexidine had the highest value followed by Pomegranate peel then Ginger while Green Tea had the lowest value. Medium with Stevia Sugar had the highest antibacterial effect followed by medium without sugar while medium with Sucrose sugar had the least effect. Conclusion: Pomegranate peel, ginger, and green tea could be considered as antibacterial agents against Streptococcus mutans. Also, Stevia sugar can be considered as a non-cariogenic agent.Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Microleakage Evaluation of Class V Resin Composite Restorations with Fluoride Iontophoresis Application on Tooth surface(an in vitro study)33734310021610.21608/adjg.2020.12080.1137ENMohamed A.WakwakLecturer of Operative Dentistry, Faculty of Dental Medicine (Boys- Cairo), Al-Azhar University, Cairo, Egypt.0000-0002-4330-7542Journal Article20190502Purpose: This study was directed to evaluate the microleakage of class V composite restoration after fluoride Iontophoresis application on tooth surface. Materials and Methods :60 freshly extracted human non carious premolar teeth were used box-shaped Class V cavities (4x2x2 mm) were prepared on the gingival one third of the tooth with occlusal margin in enamel and gingival margin in cementum half of the teeth received fluoride Iontophoresis application (FI), while the other half were not received any treatment (NF). Teeth were restored with Z250 resin composite and Kalore resin composite. The specimens stored for one month, three months and six months in distilled water at 37o C in an incubator. After storage time, specimens were immersed in dye of silver nitrate for 12 hrs. The tooth restoration interface was investigated under Scanning Electron Microscope (SEM). Results: no significant difference in microleakage of both restorations. Lower leakage score for the fluoridated group than none fluoridated one. Microleakage levels were higher in teeth occlusally than cervically. Conclusion: Microleakage is adversely affected by Fluoride iontophoresis.Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Effect of Repeated Firings on the Color Change and Surface Roughness of Two All-ceramic Systems34535410022510.21608/adjg.2020.14214.1185ENSherehan A.MohamedDentist at Ministry of Health, EgyptAtef F.AhmedProfessor and Head of Crowns and Bridges Department, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt.Walaa O.MekkawiLecturer of Crowns and Bridges, Faculty of Dental Medicine for Girls, Al-Azhar University , Cairo, Egypt.Journal Article20191216Purpose: This study aimed to evaluate the effect of repeated firings on the color change and surface roughness of two all-ceramic systems. Materials and Methods: Forty disc shaped ceramic specimens ( 10 mm x 1 mm ) were fabricated from two commercially available all-ceramic system (IPS E.max press, Ivoclar-Vivadent, Schaan, Liechtenstien, Germany and zirconia Nacera Pearl, DOCERAM Medical Ceramics, Germany) (N=20). Color measurement of the specimens was made using Reflective spectrophotometer and surface roughness (Ra) was measured using USB digital profile guage, (Elcometer 224/2, Elcometer Instruments, Great Britain) after 1, 3, 5 and 7 repeated firing. Results: The mean color change (ΔE) was clinically acceptable for both types of ceramics. As regards the effect of ceramic material on (ΔE), e.max showed statistically significantly higher mean color change (ΔE) than Zirconia. As regards the effect of repeated firings on (ΔE), 7 repeated firings showed statistically significantly higher mean (ΔE) than 5 repeated firings which in turn showed statistically significantly higher mean (ΔE) than 3 repeated firings. Surface roughness measurements showed that there were significant difference between E.max and zirconia and that zirconia showed higher mean (Ra) than e.max. Also the results of the current study showed that there were a significant difference between mean (Ra) and numbers of firing as roughness decrease with increasing the number of firing. Conclusions: Repeated firings negatively affecting the color change and surface roughness and should be minimized as possible.Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Evaluation of Shear Bond Strength of Glass Ionomer Modified with Natural Biological Products:an in Vitro Study35535910022810.21608/adjg.2020.14216.1187ENBassma R.AbdelHafeezTeaching assistant of Conservative Dentistry, Conservative Dentistry Department, Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, Egypt.Maha A.NiazyProfessor of Operative Dentistry, Operative Dentistry Department, Faculty of Dental Medicine for Girls, Al –Azhar University, Cairo, Egypt.Essam A.NaguibProfessor of Operative Dentistry, Operative Dentistry Department, Faculty of Dentistry, Cairo University, Cairo, Egypt.Sara H.YounisLecturer of Conservative Dentistry, Conservative Dentistry Department, Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, Egypt.Journal Article20190929Purpose: The aim of this study was to examine the shear bond strength (SBS) of conventional glass ionomer incorporated (GI) with flax fibers and/or ethanolic extract of propolis (EEP) with and without thermo-cycling. Materials and Methods: We used 40 extracted sound molars were used in the present study and divided into four equal groups: Group (GI) conventional glass ionomer(control), Group(F)GI incorporated with 5% flax fibers, Group (P) GI incorporated with 1% ethanolic extract of propolis (EEP), Group (FP) GI incorporated with 5% flax fibers and 1% ethanolic extract of propolis (EEP). All samples were prepared for shear bond strength assessment before and after thermocycling. Results: Showed that (F),(P) and(FP) groups had statistically significant highest median shear bond strength values before thermo-cycling in comparison to GI group. While (FP) group had the statistically significant highest median shear bond strength (SBS) after thermocycling. Conclusion:5% Flax fibers and 1% ethanolic extract of propolis (EEP)improved the shear bond strength of conventional glass ionomer.Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Effect of Different Anticollagenolytic Agents on Dentin Erosion before and After Casein Phospho Peptides-Amorphous Calcium Fluoride Phosphate Application36136710022910.21608/adjg.2020.14217.1186ENNourhan M.MoustafaTeacher assistant in Conservative Dentistry Department, Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, Egypt.Maha A.NiazyProfessor of Operative Dentistry, Operative Dentistry Department, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt.Essam A.NaguibProfessor of Operative Dentistry, Operative Dentistry Department, Faculty of Dentistry, Cairo University, Cairo, Egypt.Rasha H.AfifiLecturer of Conservative Dentistry Department, Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, Egypt.Journal Article20190805Purpose: This study aimed to compare the effect of two anticollagenolytic agents, chlorohexidine and Aloe vera on dentin microhardness and their effect as pretreatments on the remineralization potential of CPP-ACFP. Materials and Methods: For this study, 40 extracted sound human premolars were subjected to artificial erosion and randomly divided to two equal groups (20 premolars each) according to immersion in the tested anticollagenolytic agents (A); group (A1) Aloe vera and group (A2) Chlorhexidine. Each group was further subdivided into two equal subgroups (10 premolars each) according to microhardness measurement (B); group (B1): before CPP-ACFP application and group (B2): after CPP-ACFP application. Results: Results showed no statistically significant difference between Aloe-Vera and CHX; both statistically increased dentin microhardness. After immersion, AFCP showed statistically significantly higher mean microhardness than no AFCP application (P-value = 0.003) for Aloe vera and (P-value = 0.012) for CHX. Conclusion: Aloe vera and CPP-ACFP produced synergistic effect for enhancing dentin remineralization in erosive lesions.Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Antibacterial Effect of Bioactive Composite versus Glass ionomer using Different Storage Media36937410023110.21608/adjg.2020.14224.1188ENWalaa M.HassanDemonstrator of Operative Dentistry, Faculty of Dental Medicine, Nahda University, EgyptMaha A.NiazyProfessor of Operative Dentistry, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt.Mayada S.SultanLecturer of Operative, Faculty of Dental Medicine, Fayoum University, EgyptJournal Article20190722Purpose: To evaluate the antibacterial effect of Bioactive composite versus Glass ionomer using different storage media. Materials and Methods: Three restorative materials were used in this study (Reliafil Lc, Amalgomer and Conventional Glass Ionomer). 90 Disk- shaped specimens (2.5 mm height and 8 mm diameter) were prepared from each material. Groups were divided into three subgroups according to storage media (Acids, artificial saliva and de-ionized water). Bacterial strains were polished at 370c for 24h in Brain Heart Infusion broth which attained from stock cultures. Disk diffusion agar method was used for antimicrobial liability. The inhibition zone diameter around the specimen were measured at three times by the same operator after 48hs using electronic digital caliper. Results: This study found that Amalgomer has the highest antibacterial effect in lactic acid. Whereas, Conventional GIC has the highest antibacterial effect in artificial saliva and Bioactive composite in deionized water. Conclusion: This study was concluded that all the restorative material tested had an antibacterial effect in all storage media though Amalgomer seemed to be more prominent in lactic acid.Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Effect of Different Concentrations of Double Antibiotics used in Regenerative Endodontic on MicroHardness and Fracture Resistance of Radicular Dentin37538110024410.21608/adjg.2020.26113.1244ENHadeer M.MostafaDentist at Ministry of Health, Egypt.Wael H.KamelProfessor of Endodontic department Faculty of Dental Medicine for Girls Al-Azhar University, Cairo, Egypt.26701280101199Maha A.ElhosinyLecturer of Endodontic department Faculty of Dental Medicine for Girls AL-Azhar University, Cairo, Egypt.0000-0003-2913-5737Journal Article20200331Purpose: to show the effect of different concentrations of double antibiotics paste (DAP) 1, 0.1,0 .01mg/ml used in regenerative endodontic on microhardness and fracture resistance of radicular dentin. Material and methods: Forty single rooted teeth were prepared and randomized into three groups according to DAP concentration (10 samples each) and ten samples were availed as control group. Group I: root canal contained 1mg /ml DAP. Group II: root canal contained 0.1mg /ml DAP. Group III: root canal contained 0.01 mg/ml DAP. Samples were stored at 37 0c with 100% humidity for three weeks then DAP was removed by irrigation with 1.5% NaoCl followed by 17 % EDTA, finally flushed with distilled water. After removal of DAP, each tooth was decoronated at the level 0.5 mm radicular to the facial cementoenamel junction with isomet saw under water cooling. Two root cylinders were attained, one cylinder for fracture resistance assessment and the other cylinder for microhardness assessment. Results: For microhardness test, there was a statistically significant difference among different concentrations of DAP (P≤ 0.05).The highest mean value of microhardness was recorded in group III (DAP 0.01mg/ml). For fracture resistance test, there was statistically significant difference among different concentration of DAP (P≤0.05), group III (DAP 0.01mg/ml) showing the highest mean value of fracture resistance. However group III (DAP 0.01mg/ml) showing no significant difference with control group. Conclusion: Lower concentration of double antibiotic (0.01mg/ml) increases microhardness and fracture resistance of radicular dentin in revascularization procedureAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Effect of Blood Contamination on Marginal Adaptation of MTA and Endosequence Root Repair Material as a Retrograde Filling38338910023910.21608/adjg.2020.23353.1236ENMarwa A.SakerDentist at Ministry of Health, Egypt.Mohammed M.KhalefaProfessor of Endodontic, Faculty of Dental Medicine for girls, Al-Azhar University, Cairo, EgyptHemat M.El-SheikhLecturer of Endodontic, Faculty of Dental Medicine for girls, Al-Azhar University, Cairo, EgyptJournal Article20200213Purpose: This study was designed to compare marginal adaptation of MTA and Endosequence Root Repair Material (ERRM) as retrograde filling materials. Materials and methods: 40 maxillary anterior teeth were prepared and obturated with gutta-percha and AH plus using lateral compaction technique. Apical 3mm of the roots were resected and retrograde cavities were prepared with diamond coated ultrasonic retrotip. Teeth were divided randomly into two main groups (I,II) according to blood contamination of retrograde cavities and every group then divided into two sub-groups (A,B) according to retrograde materials (MTA,ERRM). Teeth sectioned longitudinally and examined for marginal gap using SEM. Results: revealed that the high mean value in cavities without blood contamination and filled with MTA in group I and the high mean value in cavities smeed with blood contamination and filled with MTA in group II. There was no statistically significant difference between 4 groups. Conclusion: MTA and ERRM exhibited nearly comparable marginal adaptation in dry or blood environment.Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Impact of Ball and Magnetic Attachments and Inter-Implant Distance on Retention of Mandibular Overdenture (An in Vitro Study)39139910024010.21608/adjg.2020.25123.1239ENNeveen S.Abd El RahimAssistant Professor of Removable Prosthodontics, Faculty of Dental Medicine for Girls, Al- Azhar University, Cairo, Egypt, Associate Professor of Removable Prosthodontics, College of Dentistry, Taibah University, Medina, Saudi Arabia.0000-0001-8225-1118Journal Article20200303Purpose: To evaluate the influence of the attachment type and inter-implant distance on the retention of 2-implant retained mandibular overdenture during 12 months of simulated function. Material and Methods: Three transparent acrylic resin casts simulating a completely edentulous mandible were fabricated. The retentive forces (N) of two implant-retained mandibular overdentures were estimated by a universal testing machine. Six groups were computed on three casts; two ball attachments with inter-implant distances (IIDs) 23mm were placed in the canine, 31mm were placed in the premolar and 40mm were placed in the first molar regions respectively and two magnetic attachments were placed on the same 3 IIDs.Mean value and differences between and within groups were calculated were performed using a one-way ANOVA, repeated measure ANOVA, and independent student’s t-test,<br />P ≤ 0.05. Results: Significant differences were detected between ball attachments at all IIDs after 12 months of simulated function, P ≤ 0.05, but no significant differences with magnetic attachments, P > 0.05. Statistically significant differences were observed between the ball and magnetic attachments at different IIDs, P = 0.001. The correlation between the attachment type, IIDs and time for both ball and magnetic attachments were significant, P=0.001. Conclusions: The retention of the ball was more than the magnetic attachment. Inter-implant distance influences the retention of both the ball and magnetic attachments. The retention of ball attachment has been influenced by 12 months of simulated function.Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-030873-C20200701Effect of Different Denture Base Materials on the Masticatory Muscle Performance in Patients Wearing Single Maxillary Complete Denture: A Cross-over Study40140610024110.21608/adjg.2020.25346.1240ENDoaa A.RostomLecturer in Prosthodontics Department, Faculty of Dentistry, Cairo University.Ahmed E.FayyadAssistant Professor in Prosthodontics Department, Faculty of Dentistry, Cairo University, Cairo, Egypt.Aliaa A.TawfeekLecturer in Clinical Neurophysiology Unit, Faculty of Medicine, Cairo University, Cairo, Egypt.Journal Article20200308Purpose: The aim of the research was to evaluate the masticatory muscle performance with different resilient denture base materials in maxillary single denture. Material and methods: Six patients were included in this cross over study. In the first stage of the study, the patients were instructed to use the denture (PMMA denture base) for 1 month and the masticatory muscle activity was assessed in the second and fourth weeks after delivery. A wash out period of two weeks was applied in this study to eliminate the effect of the previous denture then the denture material was relined to soft liner, then replaced with breflex flexible material. For each type of denture base relining material, EMG was recorded after 2 weeks form day of denture insertion (adjustment phase) then EMG was recorded after 4 weeks after complete muscles adaptation (adaptation phase). Results: Comparison between three types of denture bases was performed by one way ANOVA test which revealed significant difference between them regarding duration and amplitude of both masseter and temporalis after 2 weeks and after 4 weeks as P <0.05. Conclusion: This in-vivo study, which shows that rehabilitation of correct masticatory muscle function, improved with the proper use of denture base material and which leads to improvement in the patient’s quality of life.