Examinations Halls and Seating Numbers are Now Available for 1st Year Students 2022-2023
Examinations halls and seating numbers are now available for 1st year students 2022-2023. For more details, kindly check following link:
Examinations Halls and Seating Numbers are Now Available for 2nd Year Students 2022-2023
Examinations halls and seating numbers are now available for 2nd year students 2022-2023. For more details, kindly check following link:
https://drive.google.com/file/d/1Ex2W04fz5_hi-9hQyHR1YAEWiL4HPuqQ/view?usp=share_link
Effect of Different Nano-Fillers Addition on The Mechanical Properties of Heat-Polymerized Acrylic Resin
Research Abstract
ABSTRACT
Aim: To evaluate flexural strength (FS) and micro-hardness of poly(methylmethacrylate) (PMMA) denture base material modified with Zirconium oxide (ZrO2), titanium oxide (TiO2) and zinc oxide (ZnO) nanoparticles powder with different concentration (1.5, 3 and 5% )
Subjects and Methods: Test specimens of PMMA of dimensions (65 ×10 × 2.5 mm) were made from heat-cured acrylic resin served as control group Another nine group were made of PMMA containing 1.5, 3, and 5% (w/w) (ZrO2), (TiO2) and (ZnO) nanoparticles. Two types of mechanical tests were performed on the samples: flexural strength and hardness.
Results: Statistical analysis results revealed that non-significant increase in flexural strength of heat cured reinforced with ZrO2 Nps and ZnO Nps for all concentrations. While adding 1.5% and 5% of TiO2 Nps showed significant increase in flexural strength but 3% showed significant decrease values. Results revealed that non-significant decrease in hardness of heat cured reinforced with ZrO2 Nps ,TiO2 Nps, and ZnO Nps for all concentrations except 3% of heat cured reinforced with TiO2 Nps which showed non-significant increase in hardness.
Conclusions: It was discovered that adding of 1.5and 5% Tio2 Nps to the used denture base materials would improve the flexural strength of the denture base materials. Also, adding 1.5, 3 and 5 % ZrO2, Tio2, and ZnO Nps reduces the microhardness.
Research Date
Research Department
Research File
Research Journal
AL-AZHAR Assiut Dental Journal
Research Member
Research Pages
141:148
Research Publisher
AL-AZHAR Assiut Dental Journal
Research Rank
Local
Research Vol
5
Research Website
https://aadj.journals.ekb.eg/article_267266.html?fbclid=IwAR1NbihGOP6PJdnPeh8VS58-vI-GbHnOjnxLBAdfj2K25A5yUN8j42SvLGg
Research Year
2022
Congratulations to Student Corolos Medhat Halim for Getting Second Place in Assiut University Squash Competition
The Faculty of Dentistry would like to express its warmest congratulations to Corolos Medhat Halim, 5th year student, for getting second place in Assiut University squash competition, wishing him all the best.
Midterm Topics of Pediatric Dentistry and Oral Hygiene Exams
The Department of Pediatric Dentistry and Oral Hygiene has announced the topics of its midterm exams 2022-2023.
For more information, kindly read the provided announcement.
The 9th Meet of Faculty Committee held on Sunday 25-12-2022
The Faculty of Dentistry held its 9th meet on Sunday 25-12-2022 under the auspicious of the dean of the faculty Prof/ Mohamed Abdul Maged Katamish, Prof/ Naglaa El-Meligy the Vice Dean for Education and Student Affairs, and prof Heba Rashed Vice Dean for Community Services and Environmental Development.
IDs are now Available for 1st,3rd,4th, and 5th Year Students in Student Affairs Office
1st, ,3rd, 4th and 5th year students are urgently asked to get their IDs from student affairs office.
Important Announcement About Paying Tuition Fees
The Faculty of Dentistry would like to inform its students to urgently go to the student affairs office to pay their tuition fees.
Topics of Mid-Term Oral Radiology Exams for 4th Year Dentistry Students (New System) 2022-2023
The Oral Radiology Department has announced the topics of oral radiology midterm exams for 4th year students (new system) 2022-2023.
For more information, kindly read the provided announcement.
The 20th Training Course by Electron Microscope Unit
The Electron Microscope Unit will deliver its 20th training course for staff members about using electron microscope in research, diagnosis, and nanotechnology applications. For more information, kindly read the provided announcement.
