Improving dimensional stability of dental amalgam by using Nano Zinc Oxide.

Abdur Rehman, Nimrah Khalil, Ahsan Saleem, Nadeem Hafeez Khokhar, Syed Junaid Mehmood, Abdul Frahim Khan

Journal: JPMA. The Journal of the Pakistan Medical Association 2021;70(5):830-834

PMID: 32400736

Abstract

OBJECTIVE

To investigate the dimensional stability of dental amalgam after the incorporation of zinc oxide nano powder.

METHODS

The experimental study was conducted at the Hamdard University Dental Hospital and the Pakistan Council of Scientific and Industrial Research laboratories, Karachi, from January to June, 2018. Direct precipitation method was used in which analytical grade sodium hydroxide and zinc nitrate hex hydrate were used without any further purification. The sample was randomly divided into two groups. The control group A had 0 wt.% of nano zinc oxide, while the experimental group was further divided into 2 subgroups, with group B containing samples having 3 wt.% and group C 5 wt.% of nano zinc oxide. Delayed expansion was checked using electron micrometer. Data was analysed using SPSS 22.

RESULTS

Of the 180 samples, there were 90(50%) in control group A, and 45(25%) each in experimental groups B and C. Subgroup B showed significantly more linear expansion than subgroup C. Subgroups B and C achieved their entire linear expansion after 24 hours.

CONCLUSIONS

There was improvement in the dimensional stability of dental amalgam after the incorporation of nano particles of zinc oxide.

Address: Department of Science of Dental Material, Hamdard College of Medicine and Dentistry, Hamdard University, Karachi.; Science of Dental Material, Dr Ishrat Ul Ebad Khan Institute of Oral Health Sciences, Pakistan.; Operative Dentistry, Hamdard College of Medicine and Dentistry, Hamdard University, Karachi, Pakistan.; Hamdard College of Medicine and Dentistry, Karachi, Pakistan.; Polymer and Plastic Section PCSIR Labs Complex, Karachi, Pakistan.; ACRC-Polymer and Plastic Section, PCSIR labs complex, Karachi, Pakistan.

DOI: 10.5455/JPMA.10690

MeSH Terms: Dental Amalgam, Dental Materials, Dental Stress Analysis, Humans, Materials Testing, Nanostructures, Quality Improvement, Zinc Oxide