J Korean Acad Oral Health.  2012 Dec;36(4):297-302.

Mercury exposure from dental amalgam: a 6 month follow-up

Affiliations
  • 1Department of Preventive Dentistry, Kyungpook National University School of Dentistry, Daegu, Korea. cyh1001@knu.ac.kr
  • 2Department of Preventive Medicine and Public Health, Yeungnam University College of Medicine, Daegu, Korea.
  • 3Department of Dental Hygiene, Daegu Health College, Daegu, Korea.
  • 4Department of Dentistry, Yeungnam University College of Medicine, Daegu, Korea.
  • 5Department of Conservative Dentistry, Kyungpook National University School of Dentistry, Daegu, Korea.

Abstract

OBJECTIVES: Dental amalgam is a widely used filling material for oral cavity. The released mercury vapor from amalgam could have systemic adverse effects potentially. The purpose
of this study is to evaluate the relationship between dental amalgam and urinary mercury levels in children during a 6-month timespan.
METHODS
A total of 525 elementary school children participated in this study. Oral examination was carried out from one dentist. Urine samples collected at baseline and at 6 month were analyzed for mercury and creatinine excretion. Additionally, general characteristics of subjects were surveyed by a questionnaire. The statistical analysis was performed using the SPSS 18.0.
RESULTS
Greater amalgam surfaces were associated to higher urinary mercury levels; this tendency was similar at the 6-month observation after the correct baseline data. In the multivariable model, urinary mercury excretion was only associated with amalgam surfaces positively.
CONCLUSIONS
Even a small amount of mercury uptake from dental amalgam has been associated to increase the mercury concentration of urine.

Keyword

Children; Dental amalgam; Mercury; Urine
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