Examining 150 Children in Assiut University Dental Hospital

The head of dental hospital, prof Muhammad Nahed, announced that Assiut University Dental Hospital has examined 150 children in cooperation with Misr El Kheir Foundation and Dentacarts company. Prof. Nahed would like also to thank all the faculty staff, doctors, medical maintenance crew and security officers for participating in this initiative.

000

000

000

,L

/;

000000000L.

Examinations Halls and Seating Numbers are Now Available for all Dentistry Students in Assiut University and Assiut National University

Examinations halls and seating numbers are now available for all dentistry students in Assiut University and Assiut National University. For more details, kindly check the provided announcement.

000

 

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 Authors
Mohamed Aboshama *1, Aly Sayed 2 , Ahmed Fathey Elhagali11
Research Date
Research Department
Department of Dental Biomaterials
Research File
AADJ_Volume 5_Issue 2_Pages 141-148.pdf (1.3 MB)
Research Journal
AL-AZHAR Assiut Dental Journal
Research Member
Ali Sayed Ali Baiumy
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
Subscribe to