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Am J Orthod Dentofacial Orthop. 2015 Jun;147(6):719-24. doi: 10.1016/j.ajodo.2015.01.023.

Effect of mobile phone use on metal ion release from fixed orthodontic appliances.

Author information

1
Research associate, Departments of Ophthalmology & Visual Sciences and Biomedical Engineering, School of Medicine and Public Health, University of Wisconsin, Madison, Wis. Electronic address: saghiri@wisc.edu.
2
Researcher, Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran.
3
Clinical instructor, Department of Dental Materials, Kamal Asgar Research Center, Shiraz, Iran.
4
Resident of advance education in general dentistry (AEGD), Florida Institute for Advanced Dental Education, Miami, Fla.
5
Professor, Departments of Ophthalmology & Visual Sciences and Biomedical Engineering, School of Medicine and Public Health, University of Wisconsin, Madison, Wis.

Abstract

INTRODUCTION:

The aim of this study was to evaluate the effect of exposure to radiofrequency electromagnetic fields emitted by mobile phones on the level of nickel in saliva.

METHODS:

Fifty healthy patients with fixed orthodontic appliances were asked not to use their cell phones for a week, and their saliva samples were taken at the end of the week (control group). The patients recorded their time of mobile phone usage during the next week and returned for a second saliva collection (experimental group). Samples at both times were taken between 8:00 and 10:00 pm, and the nickel levels were measured. Two-tailed paired-samples t test, linear regression, independent t test, and 1-way analysis of variance were used for data analysis.

RESULTS:

The 2-tailed paired-samples t test showed significant differences between the levels of nickel in the control and experimental groups (t [49] = 9.967; P <0.001). The linear regression test showed a significant relationship between mobile phone usage time and the nickel release (F [1, 48] = 60.263; P <0.001; R(2) = 0.577).

CONCLUSIONS:

Mobile phone usage has a time-dependent influence on the concentration of nickel in the saliva of patients with orthodontic appliances.

PMID:
26038076
DOI:
10.1016/j.ajodo.2015.01.023
[Indexed for MEDLINE]

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