Mercury vapour exposure during dental student training in amalgam removal

Author: Warwick R, O Connor A, Lamey B.

Source: J Occup Med Toxicol.

Year: 2013

Comment:

As a means of reducing mercury exposure, this study suggests specific practices, techniques, and educational practices for dental workers dealing with amalgam fillings.

Abstract / Excerpt:

The Alberta Occupational Health and Safety threshold limit value for mercury vapor over an eight-hour time-weighted period is 25.0 mug/m3. The absolute ceiling for mercury vapor, not to be exceeded at any time, is 125.0 mug/m3. When both water spray and suction were used, mercury vapor levels were consistently below this threshold. When suction without water spray was used, mercury vapor levels exceeded the safety threshold 8% of the time. When neither water spray nor suction was used, 36% of the mercury vapor readings exceeded the absolute ceiling value. To maximize safety, dental schools should train students to remove amalgam only while using water spray and high volume suction. Alternatively, students should use appropriate occupational hygiene personal protective equipment during amalgam removals.”

Citation: Warwick R, O’Connor A, Lamey B. Mercury vapour exposure during dental student training in amalgam removal. J Occup Med Toxicol. 2013 Oct 3;8(1):27.