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EFFECT OF FINISHING TECHNIQUE ON COLOR STABILITY OF DENTAL CERAMICS

Research Abstract

ABSTRACT

Purpose: This research aimed to compare lithium disilicate glass ceramic and high translucent monolithic zirconia using different finishing techniques and after being exposed to a corrosive medium.

Materials and Methods: Two main ceramic materials, Lithium Di-silicate (IPS e.max CAD LT A3, C14) and High Translucent Zirconia (HTZ) from DD BioZx2 A3-HT, along with acetic acid as a corrosive agent was employed in this study. Forty ceramic discs(10x12mm) were classified into two groups (20 discs each) according to the type of ceramic used then each group was subdivided into two subgroups (10 discs each) according to the finishing procedure (glazed and polished) each disc was tested for color stability. All discs were immersed in 4% acetic acid as a corrosive agent to study the effect of aging on color stability of glazed and polished ceramic.

Results: In terms of color stability (∆E), both glazed and polished subgroups of E-max samples exhibited statistically significant differences after corrosion, favoring the superior color stability of glazed over polished ones (p-value=0.001). Similar trends were observed in HTZ samples, with glazed samples demonstrating better stability (p-value=0.003). Additionally, when comparing glazed samples between E-max and HTZ, the HTZ group showed significantly better color stability (p-value=0.001). The same pattern was found in polished samples, favoring HTZ over E-max (p-value=0.001).

Conclusions: Corrosion of samples exerted a notable impact on the color stability of the tested Lithium Di-silicate (E-max) and High Translucent Zirconia (HTZ) ceramics, irrespective of the finishing techniques employed. The method of finishing played crucial roles, with glazed HTZ samples demonstrating the least susceptibility to corrosion in terms of color stability.

Research Authors
Aliaa A. Al-Qousy* , Moustafa S. Mohammed** , Mohammed G. Hussein** and Cherif A. Mohsen**
Research Date
Research File
paper 1.pdf (1002.87 KB)
Research Journal
EGYPTIAN DENTAL JOURNAL
Research Member
Research Pages
1445:1452
Research Publisher
EGYPTIAN DENTAL JOURNAL
Research Rank
Local
Research Vol
70
Research Website
https://edj.journals.ekb.eg/article_348961.html
Research Year
2024

Alminshawy Inspected Second Semester Exams for Second Year (Assiut Government & National Universities) - June 10th, 2024

Prof/ Ahmad Alminshawy, President of Assiut University, inspected the second semester exams for second year ((Assiut Government & National Universities) on June 10th, 2024.

Alminshawy was Accompanied by Prof/ Dr. Nobi Mohamed Hassan (Vice President of Assiut National University for Academic Affairs)

During the inspection, the President emphasized the importance of adhering to the examination regulations for exam supervisors, the need to take all necessary measures to ensure the smooth running of the exams, and the necessity of maintaining the calmness and discipline of the exam halls.

He also polled students about the nature and difficulty of the exams and inquired about any problems they encountered during the exams.

The President was also welcomed by Prof/ Safaa Marzouk Tohami (Dean of the Faculty), Prof/ Heba Allah Gamal El-Din Rashid (Vice Dean of the Faculty for Community Service and Environmental Development), Prof/ Mohamed Badawy Abdel Hamid (Vice Dean of the Faculty for Education and Students), Prof/ Mohamed Nahed Atia (Director of the University Dental Hospital), and Mr. Montasser Hussein Ahmed (Moderator of the Faculty).

 

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Assiut University Launches "Cartoon Character … Innovative Egypt" Competition

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Prof/ Ahmed Al-Minshawy, President of Assiut University, announces the opening of applications for the second season of Helwan University's 2024 competition, entitled "The Cartoon Character: Innovative Egypt"; to develop and support the children's content industry, through animation, and children's programs, which are organized under the auspices of Prof/ Ayman Ashour, Minister of Higher Education and Scientific Research.

 

L'Oréal-UNESCO For Women in Science Program

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The L'Oréal-UNESCO For Women in Science program is a valuable resource for women scientists at all stages of their careers. The program provides women scientists with the support and resources they need to succeed in their chosen field.

Here are some additional details about the program:

 

 

 

Innovation and Entrepreneurship Competition in Health and Population for Egyptian Universities

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Under the auspices of the National Population Council in cooperation with the Supreme Council of Universities and with the support of the United States Agency for International Development through the Strengthening Egypt's Family Planning Program Project, and implemented by John Snow International, we are pleased to announce the opening of applications for participation in the Youth Competition for Youth Empowerment and Support for Innovation and Entrepreneurship in the Field of Health and Population in Egyptian Universities.

The program will be implemented over a period of four months. At the end of the program, three initiatives will be selected to receive initial funding to implement their ideas on the ground. Financial support will be provided to three outstanding initiatives to invest in their development and ensure their sustainability, in addition to other types of technical and financial support.

To apply, follow this link: https://docs.google.com/forms/d/e/1FAIpQLScEBObACYF0xspfVfracVxv-wo14vZaZrH1F1BCxV4iEdPNFw/viewform?pli=1

University Officials Inspect Examination Committees to Ensure Smooth Process

Under the patronage of Prof. Ahmed Al-Minshawy, President of Assiut University, Prof. Ahmed Abdel Mawla, Vice President of the University for Education and Student Affairs, and Prof. Noby Muhammad Hassan, Vice President of Assiut National University for Academic Affairs), Prof. Safaa Marzouk Tohamy, Dean of the Faculty, and Dr. Mohamed Badawy Abdel Hamid, Vice Dean of the Faculty for Education and Student Affairs, inspected all examination committees to ensure the smooth progress of the examination process while adhering to all regulations, ensuring a suitable environment for students within the committees and providing them with all means of comfort and support.

The College Administration extends its best wishes for success to all students and expresses its sincere thanks and appreciation to the Student Affairs Administration, the Youth Welfare Administration, the College Security Administration, the College Assistant, and all staff for their efforts throughout the year and during the examination period to provide an ideal educational environment and to ensure the best conditions for conducting examinations.

https://www.facebook.com/Assiutuniversity1/posts/pfbid02667pwfEfHQxDUZLbQG56pVfzh2sv6Bes8GKhXRex6fmuBtAsfNPshc7CvBptW1vbl

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