Ain Shams Dental Journal最新文献

{"title":"Effect of Nano-hydroxyapatite Toothpaste on Microhardness of Primary Teeth Enamel in Comparison with Two other Toothpastes “An in Vitro Study”","authors":"Marwa Mohamed, Reham Elghazawy, Amr Abd El-Aziz","doi":"10.21608/asdj.2023.164475.1145","DOIUrl":"https://doi.org/10.21608/asdj.2023.164475.1145","url":null,"abstract":"Aim: The purpose of the current study was to investigate the effect of a nano-hydroxyapatite toothpaste on microhardness primary teeth enamel in comparison with two other kinds of toothpaste (fluoride and miswak) regarding their effect on the microhardness of enamel by the Vickers hardness test and surface topography using scanning electron microscopy (SEM) Materials and methods: forty extracted primary molars were obtained from the outpatient clinic of the Pediatric Dentistry Department, Faculty of Dentistry, Ain-Shams University. samples were grouped into four main groups according to the type of toothpaste used. Group 1: specimens were brushed with Nano hydroxyapatite toothpaste. Group 2: specimens were brushed with fluoride toothpaste. Group 3: specimens were brushed with Miswak toothpaste. Group 4: specimens were immersed in distilled water; specimens were subjected to a microhardness test (the Vicker test) before and after the remineralization stage. The specimens from the Nano-HA groups, the positive control group, and the negative control group were prepared for SEM examination. These were analyzed using a scanning electron microscope. Results: The most significant finding was achieved in NHAP, followed by fluoride and then miswak, whereas the value was found to be at its lowest in distilled water. Conclusion: NHA toothpaste exerted remineralizing effects on the artificial carious lesion.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"52 37","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140400488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ASDJ Preface","authors":"","doi":"10.21608/asdj.2024.346388","DOIUrl":"https://doi.org/10.21608/asdj.2024.346388","url":null,"abstract":"","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"58 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accuracy of Eyes of AI™ Artificial Intelligence Driven Platform for Lateral Cephalometric Analysis","authors":"Hatem Saifeldin, Juan Osorio, Mingze Xi, Barbara Safwat, M. Khokher, Shenghong Li, Mostafa Ashmawy, Lobna Shalaby, Samuel Khela, Khoa Le, Sen Le, Dadong Wang","doi":"10.21608/asdj.2024.277176.1229","DOIUrl":"https://doi.org/10.21608/asdj.2024.277176.1229","url":null,"abstract":"","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"189 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140405027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Multiple Firing Cycles and Temperatures on Mechanical Properties of Lithium Silicate","authors":"Noha Moustafa Hammouda, M. Zohdy, Tarek Salah Morsi","doi":"10.21608/asdj.2023.172443.1154","DOIUrl":"https://doi.org/10.21608/asdj.2023.172443.1154","url":null,"abstract":"Aim: This study was designed to assess the effect of multiple firing cycles with different firing temperatures on the Flexural strength and Micro shear bond strength of the lithium silicate. Materials and methods: Specimens of Lithium Silicate (obsidian) were divided into 2 groups according to the tests done. The first group, Obsidian blocks were sectioned into 36 bar-shaped samples for the three-point bending test, according to ISO 6872 standard. While the second group, the blocks were used to prepare 32 slices for measuring microshear bond strength. Each group was then divided into four subgroups according to the number of the firing cycles which were 1, 2, 3 and 5 firing cycles respectively. The flexural strength and microshear bond strength were measured separately. Results: For the first group, the highest flexural strength value was found in control samples, while the lowest value was found in 3 cycles’ samples. As for the second group, the highest micro shear bond strength value was found in samples subjected to 3 cycles, while the lowest value was found in 2 cycles’ samples. This shows that there was no significant difference between values of each group. Conclusion: Obsidian can be fired up to 5 firing cycles with no adverse effect on bond strength or flexural strength.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"46 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140398358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of enamel thickness and dentin shade of resin composite on the final color reproduction.","authors":"Nermeen Diab, Khaled Nour, Mohamed Nasser","doi":"10.21608/asdj.2023.224645.1182","DOIUrl":"https://doi.org/10.21608/asdj.2023.224645.1182","url":null,"abstract":"Aim: To evaluate the effect of different dentin shades and different enamel shade thicknesses on the final color reproduction in class IV anterior resin composite restorations restored using the bilaminar technique. Materials and methods: 54 resin composite discs of 10mm diameter were prepared in this study. The discs were equally divided into 9 groups (n = 6) according to the two levels of the study, Level-1: Dentin shade (A1, A2 and A3) and Level-2: A3 enamel shade thickness (0.25mm, 0.5mm, 0.75mm). Each group had a 3mm-thick core layer of dentin shade either A1, A2 or A3 (ceram.x® duo, Dentsply Sirona, Germany) followed by the designated enamel shade thickness . Clinical spectrophotometer (VITA Easyshade® V, Germany) was used to measure the L*, a* and b* values of reference A1, A2 and A3 VITA classical shade tabs and resin composite discs. CIEDE2000 color difference formula (ΔE00) was adopted to calculate the color difference between the resin composite discs and their corresponding VITA classic shade tab. Data were analysed using two-way ANOVA followed by Tukey’s post hoc test. Comparison of main and simple effects were done utilizing one-way ANOVA followed by Tukey’s post hoc test. Results: Two-way ANOVA showed that the dentin shade and the enamel layer thickness as well as their interaction had a statistically significant effect on color difference (ΔE00) compared to the VITA classical reference tabs(p<0.001). Best shade matching to the control was obtained when A3 dentin shade was used with both 0.25mm and 0.75mm enamel thickness (3.13±0.48 and3.04±0.39, respectively) while least shade matching was obtained when A1 dentin shade was combined with 0.5mm enamel shade (6.07±0.41). Conclusions: When using the bilaminar technique in vertical anatomical layering of resin composite restorations, the thickness of the outer enamel composite together with the dentin shade used demonstrated a significant effect on the final shade. The lighter the dentin shade used the thicker the enamel thickness needed for better shade reproduction and matching.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"16 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140407896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bond Strength of Artificially Aged Fiber Reinforced Composite Material. (An in-vitro study)","authors":"Zeinab Ahmed, Sarah Abdel Moniem, O. Ghallab","doi":"10.21608/asdj.2024.267037.1209","DOIUrl":"https://doi.org/10.21608/asdj.2024.267037.1209","url":null,"abstract":"Aim: The aim of this study was to investigate the effect of time and surface treatments on shear bond strength of repaired fiber reinforced composite to nano-hybrid composite material. Materials and methods: Eighty specimens were prepared of ever-X Posterior (GC Europe). They were equally divided into two groups according to time of repair (after 24 hours and one month). Then, each group subdivided to five subgroups according to surface treatment (1-No surface treatment, 2-Diamond coated bur, two step self-etch adhesive, 3-Diamond coated bur, two step self-etch adhesive, silane, 4-Air abrasion, two step self-etch adhesive, 5-Air abrasion, two step self-etch adhesive, silane). A nano-hybrid composite was added as a material of repair in 2 mm thickness. All groups were thermocycled for 5000 cycles. The two-way ANOVA test was employed for statistical analysis of the data. Results: both the surface treatments and the time of repair had significant effect on SBS of repaired composite. The highest results were achieved in subgroup (Air abrasion and bonding agent) when repaired after one month. Conclusion: One month time relapse has no drastic effect on repair strength of FRC material. Air abrasion is considered a powerful mechanical surface treatment for achieving a highly significant repair strength of FRC material.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"55 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140399310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Impacted Mandibular Third Molars with CBCT: A Cross-Sectional Study","authors":"Ebtihal H. Zain Alabdeen, Shadia Elsayed, Ahmed Sapri, Hadeer Alruwaili, Monther Alsharif, Hanan Shokeir, Muath Al-Assaf, Safa Jambi","doi":"10.21608/asdj.2024.270220.1215","DOIUrl":"https://doi.org/10.21608/asdj.2024.270220.1215","url":null,"abstract":"Aim: The purpose of this study to evaluate and categorize the complexity of extracting impacted mandibular third molars (IMTMs) using cone beam computed tomography (CBCT). Materials and methods: CBCT used to analyze 315 lower third molars from 182 patients who met the inclusion criteria. CBCT scans were acquired with a CS 9300 Premium 3D machine. Patient demographics and IMTM details were recorded by two observers using CS 3D Imaging Software for image analysis. Descriptive statistics were applied to assess criteria for impaction and extraction difficulty. Differences in surgical risk indicators for IMTM extraction were statistically examined between age groups, gender, and ethnicities using Fisher’s exact test. Results: Patients aged 18-75 years showed that mesioangular impaction was most common at 41.90%, followed by horizontal at 30.79%, vertical at 25.72%, distoangular at 0.95%, and inverted at 0.63%. Class IA and IIA classifications were most prevalent at 27.30% and 23.49%, respectively, with Class IIIA being the least common at 1.58%. significantly higher surgical difficulty indicators seen in patients under 40 compared to older patients for right and left IMTMs (p = 0.026 and 0.011, respectively), but no statistically significant differences in these indicators were observed between genders or ethnicities. Conclusion: CBCT examination revealed that mesioangular impaction was the most frequent occurrence, followed by horizontal, vertical, distoangular, and inverted impactions. Class IA and IIA prevalent; Class IIIA least common. Surgical difficulty indication more in younger than 40 years old patients, no gender or ethnicity differences.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"92 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140405779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Cyclic Fatigue Resistance of Two Different Rotary NiTi Instruments (An In-Vitro Study)","authors":"Dalia Abd allah, mohamed Nagy, Tariq Yehia","doi":"10.21608/asdj.2023.216874.1180","DOIUrl":"https://doi.org/10.21608/asdj.2023.216874.1180","url":null,"abstract":"Aim: The aim of this study was to compare the dynamic CFR of M3-ProGold instruments and Pepsi Gold instruments. Material and methods: Eighty files of size 25/.06 of M3 Pro Gold files and Pepsi Gold files (each n = 40) were evaluated for dynamic cyclic fatigue resistance inside two artificial stainless-steel canals with 2 different radii [(60̊ curvature, 3 and 5 mm curvature radii) at body temperature and immersed in distilled water at 37° ± 1°C. The NCF (number of cycles to failure) was documented. The data was analysed by the use of ANOVA and Tukey post hoc tests (P ≤ 0 .05). Results: The Pepsi Gold instruments had a significantly greater NCF than the M3 Pro Gold files in both canal radii at body temperature. Conclusion: Pepsi Gold instruments have higher CFR than M3 Pro Gold instruments.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"36 1‐2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140400746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficiency of different irrigation protocols on Cleanliness and disinfection of root canal (An In-vitro study)","authors":"Amr Elhady, M. Obeid, Tariq Yehia","doi":"10.21608/asdj.2023.212496.1177","DOIUrl":"https://doi.org/10.21608/asdj.2023.212496.1177","url":null,"abstract":"","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Hydrothermal Aging on The Color Stability of Gradient Zirconia. In Vitro Study","authors":"Mennat Allah Ramadan, Hanaa Zaghloul, Tamer Hamza","doi":"10.21608/asdj.2024.264791.1203","DOIUrl":"https://doi.org/10.21608/asdj.2024.264791.1203","url":null,"abstract":"Aim: The study aims to assess the influence of hydrothermal aging on gradient zirconia's microstructure and color stability. Materials and methods: Ten discs were constructed from gradient zirconia blanks (3Y-TZP-5Y-TZP) using CADCAM technology. Hydrothermal aging was done in an autoclave. Color parameters (a*, b*, L*) for each disc was measured using a spectrophotometer. In order to investigate the zirconia specimens' crystalline structure, X-ray diffraction (XRD) was performed. Color stability and microstructural changes were examined before and after the aging process. Results: Following hydrothermal aging, a statistically significant decrease in the mean (L*) value was found. However, following hydrothermal aging, a statistically significant increase in the mean (a*) and (b*) values was reported. Regarding the microstructure, hydrothermal aging did not result in any significant changes. Conclusion: Artificial aging has led to color changes in gradient zirconia that were in the clinical acceptability range but has no impact on the microstructure of gradient zirconia.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"35 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140400750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}