Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401The Effect of Some Common Children’s Drinks on Color Stability of Nanocomposite and Nanoglass Ionomer8792507310.21608/adjg.2016.5073ENArwaAliB.D.S 2008G Faculty of Oral and Dental Medicine, Cairo UniversityMahaNiazyProfessor of Operative Dentistry and Vice Dean of Faculty of Dentistry Al- Azhar University (Girls’ Branch)MagdaEl MaltLecturer of Pedodontics and Oral Health, Faculty of Dentistry, Al- Azhar University (Girls’ Branch)Journal Article20180122The purpose of this study was to evaluate the effect of some common children’s drinks on color stability of nanocomposite and nanoglass ionomer. A hundred test specimens of two restorative materials (Filtek Z350; 3M and Ketac N100; 3M were<br />prepared using a Teflon mold (8x2 mm). Baseline measurements of color and surface roughness of each specimen were made and specimens (n=10) were immersed in 5 groups: G1: orange juice, G2: guava juice, G3: Strawberry milk; G4: Chocolate milk, and G5: Distilled water (control. Final measurements of color and surface roughness were performed and the results submitted to statistical analysis (2-way ANOVA, p<0.05). Their was no statisically significant difference between mean color change for both materials and the most significant color change was observed for specimens<br />when immersed in orange juice (p<0.05). With regard to roughness, nanoglass ionomer showed the most significant changes when immersed in orange juice (p<0.05). It was concluded that color changes were dependent on the immersion media rather than the material used while surface roughness was dependent on both material type and<br />immersion media. https://adjg.journals.ekb.eg/article_5073_885338685c490c4beee082f235679899.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401Effect of Laser Treatment, Self-Adhesive Resin Cement Brand and Thermocycling on Push out Bond Strength of Fiber Reinforced Post93102507410.21608/adjg.2016.5074ENMariemAbu El-NourDemonstrator, Endodontic department, Al Azhar University, Cairo, Egypt.EmanEssamAssistant professor of Fixed Prosthodontics, Faculty of Dental Medicine, Al-Azhar University.MohsenNour EldeenProfessor, head of Endodontic department, Faculty of Dental Medicine, Al-Azhar University.AhmedAbbasAssociate Professor of Dental Laser Application, National Institute of Laser Enhanced Science (NILES), Cairo University.Journal Article20180122The interface between the adhesive resin and fiber posts has an important role in their performance. However, It was found that the most frequent cause of their failure is debonding at the adhesive resin-dentin interface. The aim of the present study was to evaluate the effect of laser treatment: Erbium, Diode or no treatment; and two brands<br />of self-adhesive resin cement: hydrophobic (Smartcem2) and conventional (Breeze); in addition to the effect of thermocycling on push out bond strength of Glassix fiber- reinforced composite post. A total of ninety- six freshly extracted natural human teeth were equally divided into three main groups after root canal treatment, decoronatin and post space preparation. Teeth of group 1 were treated with Er,Cr:YSGG laser, group 2 were treated with Diode laser, while the teeth of group 3 [control] received no laser treatment. Posts in half of the speciemens of the three groups were cemented with hydrophobic resin cement (Smartcem2) and the rest were cemented with conventional resin cement (Breeze). Samples of each group were further subdivided into two subgroups according to whether they were thermocycled or not. Three slices of 3mm- thickness: cervical, middle and apical were prepared from each root. Then a push-out test was performed using universal testing machine at a strain rate of 0.5 mm/min. Data were analyzed using Unpaired t test. One-way analysis of variance (ANOVA) test was used to study the effect of different variables’ interactions. This was followed by Tukey’s post hoc test when a significant difference was detected. The significance level was set at p ≤ 0.05. The results revealed that the Er,Cr:YSGG -2790 nm laser afforded greater bond strength than the diode laser. The hydrophobic self-adhesive resin cement demonstrated higher bond strength than the other brand. In addition, thermal stresses induced by thermocycling reduced the bond strength of Glassix fiber post.https://adjg.journals.ekb.eg/article_5074_2aa43adccbf53ad348755137a92b6b9e.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401Comparison of Bond Strength and Apical Seal Obtained in Root Canals Prepared with a New Rotary System Endo Eze System and Obturated with Two Different Techniques103109507510.21608/adjg.2016.5075ENMervatMohamedB.D.S Faculty of Oral and Dental Medicine, Cairo University (2007).Mohsen EnNour EldeenProfessor and Head of Endodontics Department, Faculty of Dental Medicine for Girls, Al-Azhar University (Girls’ Branch),
Cairo, Egypt.MohamedKhalefaProfessor of Endodontics, Faculty of Dental Medicine for Girls, AL-Azhar University (Girls’ Branch), Cairo, Egypt.Journal Article20180122The aim of the present study was to compare bond strength and apical seal obtained in root canals prepared with a new rotary system (Endo-Eze) and obturated with two different techniques (AH Plus sealer/ gutta-percha points and EndoREZ sealer/ EndoREZ points). Sixty freshly extracted mandibular first molars were used in this study. The distal root of each collected tooth was removed by tapered diamond stone mounted in high-speed handpiece. Mesio-buccal canals of teeth were cleaned and shaped by Endo-Eze system, then they were classified into two main groups of 30 each according<br />to obturation materials used, Group (1): canals were obturated with lateral condensation using AH-Plus sealer and gutta-percha and Group (2): canals were obturated with lateral condensation using Endo-REZ sealer and Endo-REZ points. Within each group, samples were divided into 2 subgroups of 15 each according to assessment method, subgroup (A): 15 teeth were used for assessment of microleakage and subgroup (B): 15 teeth were used for assessment of push-out bond strength. Subgroup (C): 15 teeth were used for assessment of microleakage and subgroup (D): 15 teeth were used for assessment of push-out bond strength. Then subgroups A & C were further divided into 3 divisions according to storage time (immediately, one month and three months) after setting of the sealer. Assessment of microleakage was done by dye penetration test where 2 layers of nail varnish were applied to all the root surfaces except the apical 2 mm, then<br />the apices of the teeth were immersed in 2 % methylene blue dye solution for 2 days. Examination for linear dye penetration was done using stereomicroscope. Assessment of bond strength was done by push-out test where compressive load was applied apicocoronally in order to push the filling material toward the larger diameter. The results<br />regarding the microleakage showed that the immediate observation period in (AH Plus / gutta-percha) recorded the highest statistically significant leakage mean value while the lowest mean value was recorded in the 3 months observation period of Endo-Rez / Endo-Rez points. Regarding the push out bond strength, it was found that AH Plus /https://adjg.journals.ekb.eg/article_5075_2be880671a08c69a191fba4ca76c69a0.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401Influence of Mixing Methods, Special Trays and Storage Time on the Accuracy of two Elastomeric Impressions111118507610.21608/adjg.2016.5076ENNohaEl TawielB.D.S Tanta University, 2005, Dentist in Al Zahraa Hospital.MohamedEl-HossaryProfessor of Crowns and Bridges, Faculty of Dental Medicine “Boys” Cairo,Al-Azhar University.EmanEssamAssociate Professor, Crowns and Bridges Department, Faculty of Dental Medicine, Al-Azhar University, Girls’ Branch.Journal Article20180122This in-vitro study investigated the dimensional accuracy and stability of polyether and polyvinylsiloxane impression materials. The study included the effect of mixing methods where conventional mix versus auto-mixing technique, the effect of special tray on the accuracy of impression and pouring the impressions at different times of storage (1hour, 48 hours and 7 days). Impressions were made for a master model cast of mandibular arch with two prepared abutments; right second premolar and right second molar with a shoulder finish line made as to give a definite margin that was easily<br />defined where there was an occlusal shoulder and gingival shoulder used for occlusogingival (O-G) measurements. There was an occlusal holes made on occlusal surface of both teeth to be used as a reference points for inter-abutment distance record of the prepared abutments. All dimensions were measured on casts retrieved from impressions made on master model. The impressions were then poured with extra-hard stone into stone casts, according to times under investigations. The results revealed that the polyether elastomeric impression material presented a higher degree of accuracy than<br />vinylpolysiloxane. The automixing technique showed better results than conventional mixing, while the light- cured special tray presented slightly better dimensions. Also, the one- hour pouring time presented the best dimensions, while two- days and sevendays pouring times had almost the same dimensions.https://adjg.journals.ekb.eg/article_5076_3a6e0e0bb42cd418a7b61fcfa6e106df.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401Evaluation of Caries and Periodontal Status in A Group of Diabetic Egyptian Children119124507710.21608/adjg.2016.5077ENNouraMohammedB.D.S, Faculty of Dentistry and Oral Medicine Cairo University (2003).OsamaEl-ShallProfessor and Head of Oral Medicine, Periodontology, Diagnosis and Radiology Department, Faculty of Dental Medicine,
for Girls, Al Azhar University, Cairo. Egypt.MagdaEl-MaltLecturer Of Pediatric dentistry and dental public health, Faculty of Dental Medicine, for Girls, Al-Azhar University,NouraBadawyLecturer Of Pediatrics, Faculty Of Medicine, Cairo UniversityJournal Article20180122The present study was carried out to evaluate the dental and periodontal status in a group of Insulin dependent Egyptian children and this was accomplished clinically and microbiologically. One hundred diabetic children represented by group 1 with age range 6-14 years who had selected from out-patient clinic of Abo EL-Rish , Endocrine department of faculty of medicine, Cairo university. And ten healthy chidren represented by group 2 with the same age range, were selected from those who referred to the out-patient Pediatric clinic of faculty of dental medicine, Al-Alzhar University,<br />Girls branch. In this study dental examination was done by using mirror, probe, and periodontal probe. And caries prevalence was accomplished by using DMF, dmf and def indices. While periodontal status was evaluated by using PI, GI, PD and AL. Also this study evaluated the bacterial content qualitatively in plaque and saliva where Streptococcus<br />Mutans and Lactobacilli acidophilus were chosen because of their importance in causing dental caries. And A. actinomycetemcomitans was chosen as a gram negative bacteria type which has a major role in causing periodontal diseases. DMF and def recorded values of both groups were at the same with no statistically significant difference. While as regarded to dmf no cases in healthy group so comparison was not performed. PI, GI and PD recorded values of both groups were at the same with no statistically significant difference. While as regarded to AL no cases in healthy group so<br />comparison was not performed. Regarded prevalence of all bacterial species there were no statistically significant difference between two groups. https://adjg.journals.ekb.eg/article_5077_4ded3df33ddff0baa81b1e9b75943520.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401Effect of Food Simulating Liquids and Thermo-cycling on flexural strength and surface hardness of a Resin Nano-Ceramic CAD/CAM Material125133507810.21608/adjg.2016.5078ENAhmedSayedAssistant Lecturer of Dental Biomaterials, Faculty of Dentistry, Modern University for Technology and Information, Egypt.MahaNiazyProfessor and Head of Operative Dentistry Department, Faculty of Dentistry (Girls), Al-Azhar University, Egypt.InasMotaweeAssistant Professor and Acting Head of Dental Bioamterials Department, Faculty of Dentistry (Girls), Al-Azhar University,
Egypt.Journal Article20180122Purpose: Evaluate the effect of food simulating liquids and thermocycling on miniflexural strength and surface micro-hardness of a resin nano-ceramic material (Lava Ultimate) compared to indirect laboratory composite resin material (Nexco Paste) and direct composite resin material (Filtek Z350 XT).<br />Material and Methods: A total number of 180 samples were fabricated. The samples were divided equally into 3 groups (n=60). Group 1 (M1) samples were fabricated from the resin nano ceramic CAD/CAM blocks (Lava Ultimate), group 2 (M2) samples were farbricated form indirect micro-hybrid resin composite (Nexco Paste), while group 3 (M3) samples were fabricated from direct resin composite (Filtek Z350 XT). Thirty bars (12X2X2mm) from each material were fabricated to evaluate the mini flexural strength. Thirty disks (8X2mm) were fabricated from each material to evaluate the<br />surface micro-hardness. The samples of M1 groups were fabricated by cutting from the CAD/CAM block using low speed diamond disk while samples of M2 and M3 samples were fabricated using teflon mold. Each material samples were further subdivided into 6 subgroups; the first subgroup was not immersed into food simulating liquids nor thermocycled,<br />4 subgroups samples were immersed into food simulating liquids (water, ethanol, heptane and citric acid) and the last subgroup samples were thermocycled. Mini flexural strength test was done using universal testing machine and surface hardness was done using Vickers hardness tester.Results: Lava Ultimate showed the significantly highest mini flexural strength and surface micro-hardness values before and after immersion into food simulating liquids and thermocycling compared to the two other tested materials. Conclusion: According to the results of the present study, Lava Ultimate showed better mini flexural strength and surface micro-hardness compared to the two other<br />tested materials. https://adjg.journals.ekb.eg/article_5078_9e24dae6bb9cefe9467502e86343873f.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401Evaluation of The Antimicrobial Effect of Propolis Extract on Oral Microflora135140507910.21608/adjg.2016.5079ENSafaaEl-sayedDemonstrator at Pedodontics and Oral Dental Health, Faculty of Dental Medicine (Girl’s Branch), Al-Azhar UniversitySamyEl-BayoumyProfessor and Head of Department of Pedodontic and Dental Puplic Health, Faculty of Dental Medicine (Boy’s Branch),
Al-Azhar UniversityMohamedMostafaAssociate Professor and Head of Department of Pedodontic and Dental Puplic Health, Faculty of Dental Medicine (Girl’s
Branch), Al-Azhar UniversityMagdaEL-MaltLecturer of Pedodontics and Oral Dental Health,Faculty of Dental Medicine (Girl’s Branch), Al-Azhar UniversityJournal Article20180122Aim: This study was conducted to evaluate the antimicrobial effect of propolis extract with different dilutions when applied as mouth wash in vivo against a known antiseptic agent (0.2%Chlorhexidine) . Material and Methods: Ninety children were selected for this study. All children were examined clinically for dental caries and used to evaluate the antimicrobial effect of studied materials. The childern were divided equally into two groups (fourty five in every group). In the first group childern were instructed to rinse with 3 ml of propolis extract for specific time and divided into three sub groubs while in the other group childern were instructed to rinse with 3 ml of Chlorhexidine. Result: The results of this study revealed that the use of propolis mouth washby childern achieved mean of reduction of total bacterial count. The effect of 0.2% Chlorhexidine was higher than the effect of propolis in total bacterial count reduction .<br />Conclusion: This study concluded that Propolis is an antimicrobial agent as it significantly reduced the total bacterial count in the saliva of childern when compared by apotent antiseptic like 0.2% chlorhexidine. https://adjg.journals.ekb.eg/article_5079_a3fa3f2a29735c84673fe3fbcec7bd4e.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401Effect of Childhood Malnutrition on Salivary Flow and pH141145508010.21608/adjg.2016.5080ENDoaaHashemB.D.S, Faculty of Oral and Dental Medicine, Cairo University (2007)SamyEl-BayoumyProfessor and Head of Department of Pedodontics and Dental Public Health. Faculty of Dental Medicine (Boys’ branch),
Al Azhar University.WafaaFahmyProfessor of Public Health and Nutrition. National Nutrition Institute, Cairo, EgyptMagdaEl MaltLecturer, Pediatric Dentistry and Public Health Department. Faculty of Dental Medicine (Girls’ branch), Al Azhar University.Journal Article20180122The aim of the present study was to assess the effect of childhood malnutrition on salivary flow rate and pH. Four hundred children between 3-12 years were selected for this study. The children were divided into two main groups according to their nutrition status, Group (A): two hundred children representing the malnourished children, Group (B): two hundred children representing the control group. Within Group (A) Children were further divided into 2 subgroups, subgroup (1): one hundred stunted children and subgroup (2): one hundred underweight children. Every child was subjected to unstimulated and stimulated saliva flow and pH measurements and caries status evaluation using dmf index for primary and DMF index for permanent teeth. The results showed undernutrition (underweight) and stunting reduced the secretion rate of stimulated saliva and no effect on unstimulated salivary flow rate or saliva pH. Moreover, undernutrition<br />(underweight) increased the caries index of primary teeth, while stunting increased the caries index of permanent teeth. It was concluded that malnutrition causes enamel hypoplasia, salivary gland hypofunction and saliva compositional changes and these might be the mechanisms through which malnutrition associated with caries. https://adjg.journals.ekb.eg/article_5080_eedb445d9cd02be98fc98777e958b2b9.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401Effect of Flexible Denture Base on Retention of Complete Denture147151508110.21608/adjg.2016.5081ENDinaHssanDentist of Medical Affaires for Girls, Al Azhar University.MohamedSanadProfessor a of Removable Prosthodontics , Faculty of Dental Medicine for Girls, Al Azhar University.ShereenKabeelLecturer of Removable Prosthodontics, Faculty of Dental Medicine for Girls, Al Azhar UniversityJournal Article20180122Aim of the study: to evaluate the effect of flexible denture base materials on retention of complete denture.<br />Material & methods: Seven completely edentulous patients with age ranged between 45 and 55 years were selected for this study. Complete conventional heat cured acrylic resin dentures were constructed for all patients .The retention was evaluated after one and three months from dentures delivery. Another set of flexible denture base was constructed for all patients then the retention were evaluated after one and three months from denture delivery.<br />Results: The result of the study revealed that there were statistically significant differences in the retention between heat and flexible cured acrylic resin denture bases (p value <0.001).<br />Conclusion: from This study it is concluded that the flexible heat acrylic resin denture base improve retention of complete dentures.https://adjg.journals.ekb.eg/article_5081_83850e52e4435270d2c7536d0d62300b.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083220160401Influence of Adhesive on Shear Bond Strength Between Denture Base Materials and Self-Cured Silicon Soft Liner153159508210.21608/adjg.2016.5082ENMohamedEbrahimAssistant Professor of Dental Biomaterials, Faculty of Dental Medicine Al Azhar University, Cairo (Boys)MohamedAhmedAssistant Professor of Prosthodontics, Faculty of Dental Medicine, Taif University, Taif, KSAMostafaFayadLecturer of Removable Prosthodontics, Faculty of Dental Medicine, Al- Azhar University. Cairo (Boys)Journal Article20180122Background: Soft lining materials play an important role in modern prosthodontics because of their capability of restoring health of inflamed and distorted mucosa. Gradual changes of oral tissues require that complete or partial dentures be relined to improve their adaptation to the supporting tissue. This study aimed to evaluate the shear bond strength (SBS) of heat cured acrylic and injection-molded ValplastTM denture base materials to silicone self-cure soft lining materials, with and without adhesive, after storage in two different times in artificial saliva. Materials and Methods: 40 rectangular<br />specimens were prepared from two types of self-cured silicone soft lining material,one with adhesive and the other without adhesive were applied to two types of denture base materials ( heat polymerized Polymethyl methacrylate and injection-molded nylon denture base materials). Shear bond strength of the specimens was measured, after immersion<br />in artificial saliva for different periods (72 hours or 10 weeks), using Lloyd universal testing machine. Results: Acrylic denture base bonded to soft liner with adhesive at 72 hours of immersion in artificial saliva showed the highest shear bond strength. Comparing SBS values of the tested soft lining materials revealed significant differences between adhesively bonded and non-adhesively bonded types. Conclusions: This study concluded that the bond strength of the silicone soft lining materials with denture base materials increased with adhesive. Silicone soft lining materials are affected by artificial saliva storage. https://adjg.journals.ekb.eg/article_5082_0ac38fc333f6129c7e46be64dd955f7e.pdf