Al-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701The Effect of Using Ultra Suction System on Mandibular Complete Denture Retention161169508310.21608/adjg.2016.5083ENFatmaSayedMDS Student at The Prosthetic Department, Faculty of Dental Medicine for Girls, Al Azhar UniversityMohamedSanadProfessor of Removable Prosthodontics, Faculty of Dental Medicine for Girls, Al Azhar UniversityOlaOmarAssistant Professor of Removable Prosthodontics, Faculty of Dental Medicine for Girls, Al Azhar UniversityHanaaYoussefAssistant Professor of Removable Prosthodontics, Faculty of Dental Medicine for Girls, Misr International UniversityJournal Article20180122Aim of the study: This study was carried out to evaluate the effect of using ultra suction system on mandibular complete denture retention and on the rate of growth of candida albicans. Material and methods: Ten completely edentulous patients participated in this study. Each patient recived two dentures a conventional mandibular denture<br />(D1 denture) constructed using heat cured acrylic resin and an ultra suction retained denture (D2 denture) which was constructed using heat cured acrylic resin with ultra suction system added to it. Patients were left to function with each denture set for a period one week, one month, three months respectivly during which they were recalled<br />to test denture retention and to make microbilogical examination. Retention test was conducted using universal testing machine after pulling the denture from it’s geographic centre. The collected records were recorded, tabulated and statistically analyzed for each denture using the paired t test. Results: The mean retention value for (D1 denture)<br />were 3.66 ±1.07, 3.02±0.82, 4.07± 0.84 , 3.97 ± 0.99 at the baseline and after one week .one month ,three months respectively while for (D2 denture)values were 8.01±2.80 , 8.35± 2.53, 8.72±2.19, 7.11±1.70 at the baseline and after one week .one month ,three months respectively. Statistical analysis of these data revealed a significance increase in<br />the retention after application of ultra suction system. The mean values for microbilogy test were calculated using Chi square test at the base line and after three months of wearing dentures and after statically analyzing the results, it showed that statistically non-significant difference between conventional (D1) and ultra-suction (D2) denture<br />(P=0.1286>0.05). https://adjg.journals.ekb.eg/article_5083_96b96cd50a9122f46c1f14c1340c0d6b.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701Effect of Nanohydroxyapatite with and without Chlorhexidine on Remineralization of Carious Dentine at Different Intervals: An in vivo study171176508410.21608/adjg.2016.5084ENSamaaIbrahimAssisstant Lecturer of Operative Dentistry, Faculty of Dental Medicine, Al- Azhar University (Girls’ Branch).MahaNiazyProfessor of Operative Dentistry, Faculty of Dental Medicine, Al- Azhar University (Girls’ Branch).MohammadEl- YasakyProfessor of Operative Dentistry and Dean of Faculty of Dental Medicine, Sinai UniversityNaglaaEl- KilaniAssociate Professor of Oral and Dental Medicine, Periodontology, Radiology and Oral Diagnosis, Faculty of Dental
Medicine, Al- Azhar University (Girls’ Branch).Journal Article20180122This invivo study was carried out to evaluate the effect of nanohydroxyapatite (n-HAp); applied with or without prior application of chlorhexidine (CHX), on remineralization of caries- affected and caries infected dentine types. Forty molars in eight patients having class I caries and no pulpal involvement were selected. In each selected molar, caries was removed except from the pulpal floor. Thereafter, molars were divided into two groups (n= 20) according to the type of carious dentine left on the pulpal floor; caries- affected or infected dentine. Each group was further subdivided<br />into two subgroups (n=10) according to the material that was applied on carious dentine; n-HAp with or without 2% CHX. All cavities were finally sealed with glass ionomer restoration. Assessment of mineral density was performed at base line, one and three months using digitized radiography. The results showed increased mineral density in caries- affected dentine group; with no significant difference neither n-HAp was applied with or without CHX, nor was the application time increased more than one month. In caries- infected dentine group, however, mineral density was decreased. Such<br />decrease was significantly evident at the third month; when n-HAp was applied without CHX. It was concluded that n- HAp could only promote remineralization of cariesaffected dentine. Additionally, although application of CHX prior to n-HAp showed no considerable influence on remineralization, yet, it could be recommended in case of caries- infected dentine as an antiseptic. https://adjg.journals.ekb.eg/article_5084_7b36d0499834f5494df3c811907ac688.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701Effect of Application of EDTA and Delayed Light Activation on Bond Strength of Resin-Modified Glass Ionomer to Dentin177182508510.21608/adjg.2016.5085ENMennaAliB.D.S, Faculty of Oral and Dental Medicine, Al Azhar University (2008).MahaNiazyProfessor and Head of Operative Dentistry Department, Faculty of Oral and Dental Medicine for Girls, Al Azhar University.DoaaEl-SharkawyLecturer of Operative Dentistry Department, Faculty of Oral and Dental Medicine for Girls, Al Azhar University.Journal Article20180122The aim of the present study was to evaluate the effect of delayed light activation and the application of EDTA on bond strength between resin modified glass ionomer and dentin. Thirty permanent sound human posterior teeth were used. The crowns were separated from the roots 1mm below cervical line and then the crowns were cut in a mesio-distal direction to obtain two halves. Samples then were embedded in self cure acrylic resin and then trimmed to create flat dentinal surfaces. Samples were divided in to three groups of 20 each according to light activation (immediate, delayed or without). Each group was subdivided into two subgroups of 10 each according to EDTA application (conditioned or non-conditioned). The restorative material was applied to a cylindrical mold (2 mm diameter and a height of 1mm) fixed on the surfaces of conditioned and non-conditioned samples then subjected to light activation either immediate,<br />delayed or without. Samples were stored for 24h at 37°C. Shear bond strength testing was done using universal testing machine. Two teeth for each group were prepared for SEM evaluation after being divided longitudinally within the center of the restoration and the interface was examined. The results showed that delaying light activation has significantly decreased shear bond between RMGI and dentin and that the application of EDTA resulted in increase in bond strength for all groups. The lowest shear bond strength was for the conventional type while the highest one was for the immediate light cured RMGI group. The interface as revealed by the SEM showed thicker and longer resin tags in the EDTA preconditioned specimens than without conditioning. It was concluded that the use of EDTA as dentin pre conditioning was beneficial to the bond strength of both RMGI and conventional GI to dentin and that RMGI provides better<br />dentin bonding as compared to conventional GI. https://adjg.journals.ekb.eg/article_5085_90b60f42cdf761500687997f38aa47b4.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701Effect of Hydroxyapatite and Sodium Hexameta Phosphate Application on Demineralized Enamel and Dentine183191508610.21608/adjg.2016.5086ENSaraZaremB.D.S, Faculty of Oral and Dental Medicine, Tripoly University(2008). Professor and Head of Operative Dentistry
Department. Faculty of Dental Medicine for Girls, Al-Azhar University.MahaNiazyProfessor and Head of Operative Dentistry Department. Faculty of Dental Medicine for Girls, Al-Azhar University.NeveinGadLecturer of Operative Dentistry Department. Faculty of Dental Medicine for Girls, Al-Azhar University.Journal Article20180122The aim of the present study was to evaluate the remineralizing effect of (hydroxyapatite nano particles,sodium hexametaphosphate, hydroxyapatite nanoparticles and sodium hexametaphosphate in combination) with and without use of artificial saliva on enamel and dentin. Forty freshly extracted human premolars were used in this study.<br />They should be free from caires, macroscopic cracks, abrasion or extensive staining.<br />The teeth were kept in normal saline until use. Each tooth was horizontally cut to separate the crown from the root by using a low – speed double faced diamond disc. Each crown were then sectioned longitudinally in to two parts (buccal and lingual) then put it in normal saline to avoid dehydration.The samples were divided into (2) main groups of (15) samples, where group one consist of (15) teeth (2 halves) not immersed in artificial saliva, while group two included the samples which immersed in artificial saliva. According to the substrate tissue they devided into enamel group (B1) and dentine group (B2). Each group was then subdivided into four subgroups of 5 samples each, according to the treatment solution, Subgroup (A1): treated with hydroxyapatite nanoparticle, Subgroup (A2): treated with sodium hexametaphosphate and Subgroup (A3): treated with combination of two materials (HA + SHMP).Sample were subjected to the following<br />testing procedure: 1) The qualitative micro-morphological changes that occurred in enamel surface and in the dentin after etching and after the application of the remineralizing solutions.2)The quantitative analyzed using Energy dispersive X-ray spectrometric Analysis (EDXA) to determine the calcium and phosphorous mineral content and the change in the levels of these elements percentage due to demineralization. As well, the fluoride content was deduced in respect to these subgroups treated with HA solutions. The results was found that (HA+SHMP+AS) group in enamel recorded the highest<br />total mean mineral contents, followed by (HA+AS) group in enamel, then group (HA+SHMP) in dentine,while the mean for control (HA) in enamel group recorded the lowest total mean mineral contents. The difference between groups was statistically https://adjg.journals.ekb.eg/article_5086_ce1e674fd23b391e05658554bbc062c6.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701The Effect of Aloe Vera and Eucalyptol Oil on the Development of Tooth Germs in Albino Rats: A Histological and Histochemical Study193200508710.21608/adjg.2016.5087ENNouraBakrDemonstrator of Oral and Dental Biology, AL-Azhar University for Girls.HebaAdawyAssociate Professor of Oral and Dental Biology Faculty of Dental Medicine, AL-Azhar University for Girls.MarwaEl SheikhLecturer of Oral and Dental Biology Faculty of Dental Medicine AL-Azhar University for Girls.Journal Article20180122Tooth development or odontogenesis is a very complex process involving many growth factors and transcription factors of genes to ensure an ordered and controlled development of tooth germs. Increasing use of herbal remedies by mothers during pregnancy to avoid side effects of medical drugs may cause systemic and local effects on tooth development. In this study 50 pregnant rats were used, G1 control, GII eucalyptol oil vapour, GIII aloe vera. Offsprings were sacrificed at 1stday and 5th day, the specimens were obtained by serial sagittal sections and stained with (H&E) and Mercuric Bromophenol Blue (special stain). Administration of these herbal medicine during pregnancy result in adverse effects on tooth germ development of the offspring, delay tooth formation, change the thickness of the constituent layers of the teeth and disturbance and altered minerlization of enamel and dentin layers.https://adjg.journals.ekb.eg/article_5087_2a27c3ce1fc307b97881072b949e2225.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701Evaluation of Nano- Hydroxyapatite versus Hydroxyapatite Crystals in the Treatment of Periodontal Intrabony Defects201208508810.21608/adjg.2016.5088ENAmalEL SaidDemonstrator in Department of Oral Medicine, Periodontology,Oral Diagnosis and Dental Radiology Faculty of Dental
Medicine Al-Azhar University, (Girls Branch)EatemadShoriebahProfessor of Oral Medicine, periodontology, Oral Diagnosis and Dental Radiology Department, Faculty of Dental Medicine
Al-Azhar University, (Girls Branch)NaglaaEL KilanyAssistant Professor of Oral Medicine, Periodontology, Oral Diagnosis and Dental Radiology Department,Faculty of Dental
Medicine Al- Azhar University, (Girls Branch)Journal Article20180122The aim of the present study was to evaluate clinically and radiographically the<br />effectiveness of nano-crystalline hydroxyapatite (NcHA) versus hydroxyapatite (HA)<br />crystals in the treatment of intrabony periodontal defects. Subjects and Methods:<br />Twelve patients with bilateral defects, with probing depth (PD) ≥5 mm and clinical<br />attachment loss (CAL) ≥3 mm participated in the present study. Subjects were divided<br />randomly into Group 1: 12 sites treated surgically with open flap debridement (OFD)<br />and placement of NcHA (1) as a bone substitute. Group 2: 12 sites treated surgically<br />with open flap debridement and placement of HA (2) as a bone substitute. The following<br />clinical parameters were recorded: PD, CAL, plaque index (PI), gingival index<br />(GI), alveolar bone level percentage and bone density percentage. Results: At 6 months<br />following therapy, PD and CAL decreased by time, with a statistically significant difference<br />in both groups .On comparison of the mean difference in PD and CAL between the<br />two groups after Mann-Whitney U test was applied at baseline, 3 and 6 months, scores<br />were found to be statistically non-significant (p>0.01). A significant reduction in PI and<br />GI were recorded following therapy. As regard to radiographic bone measurements,<br />in both groups, alveolar bone level percent decreased by time, with a non-significant<br />difference. The change occurring in the first interval was greater in both groups, with a<br />non-significant difference. In both groups, bone density percent increased by time, with<br />a significant difference. The change occurring in the second interval was greater in both<br />groups, with a non-significant difference between changes occurring in both intervals.<br />Conclusion: Both NcHA and conventional HA led to the improvement of clinical and<br />radiographic parameters over the course of the study. The NcHA group did not show<br />any significant improvement over the HA group.https://adjg.journals.ekb.eg/article_5088_003c06e80d1fb7fd9ebaa237110e5496.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701Effect of Gamma Radiation on Mechanical Properties of Tooth Structure209214508910.21608/adjg.2016.5089ENRaniaHindiB.D.S 2005, Faculty of Oral and Dental Medicine, Mansoura University.HalaHazzaaAssistant Professor of Oral Medicine, Faculty of Dental Medicine for Girls, Al- Azhar University.DoaaEl-SharkawyLecturer of Operative Dentistry, Faculty of Dental Medicine, Al-Azhar University for Girls.Journal Article20180122This in vitro study was made to evaluate the effect of gamma radiation on mechanical properties of tooth structure. A total number of 40 human premolar teeth were collected. The teeth were healthy and were freshly extracted and they were stored in distilled water for periods of less than one month the teeth were, free from any apparent caries,<br />macroscopic cracks, and abrasion and staining as assessed by visual examination.<br />The teeth were divided into 2 groups of 20 teeth each (A and B) The groups were: 1. Group (A) which served as a control.<br />2. Group (B) which subjected to 60 Gy of γ- radiation. The result showed the enamel microhardness increased after adose of 60 under the limitation of this study it was found that. The enamel microhardness increased at a dose of 60GY whereas the value of dentin microhardness decreases. https://adjg.journals.ekb.eg/article_5089_7fc1ce0112554dd9f5b74aa245c1e6a2.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701A Clinical and Laboratory Evaluation of Different Remineralizing Agents Used for Treatment of Carious Posterior Teeth215222509010.21608/adjg.2016.5090ENEmanMohamedAssistant Lecturer, Pediatric Dentistry and Public Health, Faculty of Dental Medicine for Girls, Al- Azhar University.EatimadShoreibahProfessor of Oral Medicine and Periodontology, and Former Dean, Faculty of Dental Medicine for Girls, Al-Azhar UniversityEmanElmasryProfessor of Pediatric Dentistry and Public Health, Faculty of Oral and Dental Medicine, Cairo University.MahaNiazyProfessor of Operative Dentistry, and Former Vice Dean, Faculty of Dental Medicine for Girls, Al-Azhar UniversityMohamedMostafaAssociate Professor of Pediatric Dentistry and Public Health, Faculty of Dental Medicine for Girls, Al- Azhar UniversityJournal Article20180122Objective: The purpose of this study is to 1) evaluate clinically and radiographically the carious dentin treated with Ozone, Casein Phosphopeptide - Amorphous Calcium Phosphate (Tooth Mousse) mixed with Glass Ionomer and Glass Ionomer Cement only in primary molars of 4 - 8 years old children (In vivo study), and 2) Compare the micro<br />hardness of carious dentin treated with Ozone, Casein Phosphopeptide - Amorphous Calcium Phosphate (Tooth Mousse) mixed with Glass Ionomer and Glass Ionomer Cement only in extracted primary molars (In vitro study). Design: Forty five primary molars with proximal caries in children, ranging in their age from 4-8 years old. They were equally divided into three groups (15 each) according to the materials were used for restoration. The first group was restored with glass ionomer cement, the second group was restored with Casein Phosphopeptide – Amorphous Calcium Phosphate<br />(CPP-ACP ) incorporated with glass ionomer cement, and the third group was pretreated with ozonized olive oil then restored with glass ionomer cement. Also this study was carried out on forty five freshly extracted carious primary molars, which divided equally into three groups and restored as mentioned before in clinical cases and examined<br />for microhardness assessment. Results: the greatest value of mean radiodensity was recorded in Tooth Mousse group followed by Glass ionomer group then Ozone group. However there was no statistically significant difference between the three groups. Conclusion: Casein phosphopeptide - Amorphous Calcium Phosphate (Tooth Mousse) mixed with Glass ionomer cement as well as glass ionomer alone seemed to be successful as a remineralizing agent in primary molars.https://adjg.journals.ekb.eg/article_5090_51531eea3501eeccc2473807fe01ad40.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701The Effect of Siwak and Brushing on Cariogenic Bacteria and Surface Characteristics of Enamel and Two Brands of resin Composite (An in vitro study)*223233509110.21608/adjg.2016.5091ENShahendaAbdullahDemonstrator at Dental Biomaterials Department, Faculty of Dental Medicine, Al-Azhar University (Girls Branch)MahaNiazyProfessor and Head of Operative Department, Faculty of Dental Medicine, Al-Azhar University (Girls Branch)InasMotaweaAssistant Professor and Head of Dental Biomaterials Department, Faculty of Dental Medicine, Al-Azhar University (Girls
Branch)Journal Article20180122Purpose: The aim of this study was to evaluate the effect of siwak extract and toothbrush using two brands of toothpaste one containing siwak extract and one without on the cariogenic bacteria and surface characteristic of enamel and two types of composite resin. Materials and Methods: A total of 90 specimens were used in the present study. The specimens were divided into three groups according to the type of material used (n=30); Enamel specimens, Feltk Z350 specimens, and Tetric-N-Ceram Specimens. Each group was further subdivided into 3 subgroups according to the method<br />of treatment (n=10); specimens treated with Siwak sticks, specimens treated with toothbrush and toothpaste containing Siwak, and specimens treated with toothbrush and toothpaste not containing Siwak. All specimens were stained by coffee and tea stains, then surface treatment was done using electrical toothbrushing machine. Color measurements,<br />surface roughness for all specimens and wear resistance for composite resin specimens were done after staining and then after surface treatment. Antimicrobial activity was done using minimum inhibitory concentration (MIC) method. Results:<br />Antimicrobial activity of toothpaste containing siwak showed the lowest significant (MIC) on all the tested microorganisms. There was a statistically significant differences in the ΔE values and ΔW values of the treated subgroups. Moreover, significant differences in Ra values were observed between the control and stained specimens, as well as between subgroups treated with Siwak sticks, toothpaste containing Siwak, and toothpaste not containing Siwak. Conclusions: Siwak and toothpaste containing siwak are effective in removing the stains from enamel and resin composite surface without increase surface roughness or causing wear of the resin composite, however, the impact of the toothpaste containing siwak was more effective than siwak extract on the tested microorganisms.https://adjg.journals.ekb.eg/article_5091_57f7f052f84f7a4fb547830689b60f3b.pdfAl-Azhar University, Faculty of Dental Medicine, Girls BranchAl-Azhar Dental Journal for Girls2537-03083320160701Effect of Taper Angle and Luting cement on the Retention and Marginal Accuracy of All-Ceramic Crowns235245509210.21608/adjg.2016.5092ENSallyAdawyDemonstrator, Fixed Prosthodontic Department, Al Azhar University, Cairo, Egypt.AtefFathyAssistant Professor of Fixed Prosthodontics, Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt.EmanEssamAssistant Professor of Fixed Prosthodontics, Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt.Journal Article20180122Marginal accuracy and retention of all-ceramic crowns are crucial prerequisites for their long-term survival. Meanwhile, the innovative revolution of adhesive cementation has led to uncountable number of recent brands through which the dentist has to choose. The aim of the present study was to evaluate the effect of two different tapering angles [10°& 26°] and two different luting cements [Self-etching adhesive & Self adhesive resin cement] on the retention and marginal accuracy of single unit crowns, constructed from three types of ceramics: IPS e-max Press, IPS e-max CAD and Zirconia<br />CAD/CAM. Seventy two recently extracted sound human molars were used in this study. The teeth were mounted on acrylic blocks and randomly divided into two equal main groups (n = 36) according to the degree of tapering angles10˚ and 26˚. Every group was subdivided into three subgroups according to the type of ceramic used (n= 12) IPS e-max<br />Press, IPS e-max CAD and Zirconia CAD/CAM. The occlusal surface of each specimen was reduced to a flat plane perpendicular to the Long axis and all the resulting preparations had the same coronal height 4mm. The crowns of each subgroup were fabricated according to the manufacturer’s instruction. The crowns of each subgroup were<br />further subdivided into two subdivisions (n=6) according to the type of luting cement used; Multilink N and Multilink Speed. Marginal accuracy was detected before and after cementation of all specimens by stereomicroscope. All samples were subjected to retention testing using the universal testing machine. Data was collected and statistically<br />analyzed. Heat Press fabrication technique resulted in a superior marginal fit, and higher retention of crowns as compared to the CAD/CAM technique. The self etch resin cement improved the marginal fit and retention of single unit crowns more than the self adhesive resin cement.https://adjg.journals.ekb.eg/article_5092_e2d99ad5b9d89c084e987902e4e0dfc5.pdf