Effects of adding eggshell powder and medical mud powder on the mechanical Properties of type III of gypsum product

Authors

  • Zahraa saad A. karkosh College of dentistry, Ibn- Sina University of medical and pharmaceutical sciences, Iraq, Baghdad, clinical sciences department.
  • Mohammed. R. Abduljabbar College of Dentistry, Anbar University, Prosthodontics department.
  • Safa G. Dekan Collage of Dentistry, Ibn Sina University of Medical and Pharmaceutical Sciences, Iraq, Baghdad, Clinical sciences department.
  • Nuha Agab Hamed College of Dentistry, University of Anbar, Iraq, Department of Periodontics Dentistry.

Keywords:

dental stone, medical mud, impact, setting time.

Abstract

Since type III of gypsum product can also be susceptible to fracture by sadden blow, this can be prevented by adding reinforcing materials of eggshell powder with powder of medical mud. Furthermore, it can be used as a biocompatible reinforcing material due to the content of medical mud that has 34% alumina, 50% silica, as well as traces of iron oxide, magnesium, and lime material. Eggshell powder contains 95% calcium carbonate, 3% phosphorus, and 3% magnesium, along with traces
of sodium, potassium, zinc, manganese, iron, and copper.
Aim: to determine the effect of in-cooperation of eggshell powder and medical mud powder to
type III gypsum product.
Subject and methods: Forty samples were prepared by adding eggshell powder 2.5 % and 2.5
% of medical mud powder concentration to dental stone to measure impact strength and setting
time.
Results: descriptive statistics used to interrupt the data obtained in this search, which showed an
increase in the impact strength with a decrease in setting time.
Conclusion: The addition of eggshell powder and medical mud powder to dental stone had a
positive effect on some of the mechanical properties.

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Published

2025-08-04

Issue

Vol. 4 No. 1 (2025): Medical Journal of Ahl al-Bayt University

Section

Articles