Mercury & Analgam Constitute A Massive Danger To Dentists & Patients

From: Jan (jdrew63929_at_aol.com)
Date: 02/22/05 

Date: 21 Feb 2005 23:01:01 -0800

Mercury & Amalgam constitute a
Massive Danger to Dentists and Patients

Be Careful of Modern Dental Techniques
Laser Dentistry - Increased Mercury Release from amalgam
Bleaching Techniques - Increased Mercury Release from amalgam

Mercury Vapor Release From Dental Amalgam After Laser Treatment. Ploch,
T; Mathias, J. Eur J Oral Science, 106(l):600?2, Feb 1998.

ABSTRACT: The aim of this study was to determine whether the treatment
of amalgam with different lasers leads to an increased release of
mercury (Hg) vapor. In the case of C02?lasers in pulse and
continuous?wave mode, there was no effect visible on the amalgam
surface and no Hg vapor could be detected. Using an Nd:YAG, Er:YAG or
Nd:YLF laser, crater formation could be observed on the amalgam
surfaces. With the solid state lasers tested, however, the Hg vapor
measurements taken indicated that pulses applied to amalgam cause a
substantially increased release of Hg vapor. This vapor may contribute
to the patient's total mercury exposure.

Mercury release from dental amalgam after treatment with 10% carbamide
peroxide in vitro.

Rotstein I Dogan H Avron Y Shemesh H Steinberg D Oral Surg Oral Med
Oral Pathol Oral Radiol Endod (2000 Feb) 89(2): 216-9

OBJECTIVES: The effect of 10% carbamide peroxide on mercury release
from dental amalgams was assessed in vitro by using a cold-vapor atomic
absorption Mercury Analyzer System. RESULTS: Amalgam specimens exposed
for 48 hours to 10% carbamide peroxide showed significantly higher
concentrations of mercury in solution as compared with specimens
treated with phosphate buffer (P <.001). Megaloy and Valiant Ph.D.
yielded significantly higher mercury concentrations in solution than
Mega+ and Nongama 2 (P <.001). Mega+ yielded significantly higher
mercury concentrations in solution than Nongama 2 (P <.05). No
significant differences were found in mercury concentrations in
solution between Megaloy and Valiant Ph.D.

CONCLUSIONS: Treatment with 10% carbamide peroxide bleaching agents
caused an increase in mercury release from amalgam restorations,
possibly increasing exposure of patients to its adverse effects.
Amalgam brands differed in the amounts of mercury release after
bleaching with carbamide peroxide.

Relevant Pages

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