A coaching institution for ADC examination, ORE and Government dental jobs exam.
SAQ 1. A patient arrives at your office and expresses concern about mercury from dental amalgam causing her harm. What will you tell this patient to reassure her about the safety of amalgam?
ANSWER:
You will explain three facts of dental amalgam fillings:
(1) The mercury present in amalgam is not free. It is always tied up chemically in the dental amalgam matrix. It is never released into the body. The majority of bound mercury never leaves the dental amalgam mass.
Zinc as such does not participate in the amalgamation process or in the setting reaction of silver amalgam alloy with mercury during and after the completion of the restoration process.
In this section, we shall discuss the composition, type and properties of the dental amalgams alloys used for restoration purpose in posterior teeth as per following format. The source of these notes, MCQs and explanation is Phillips’ Science of Dental Materials, 12th Ed and Sturtevant’s Art and Science of Operative Dentistry.
Zinc as such does not participate in the amalgamation process or in the setting reaction of silver amalgam alloy with mercury during and after the completion of the restoration process.
These are light activated unfilled resins. Most are relatively viscous and do not set through loss of solvent. They set either by chemical or light activation.
The pulp of a tooth lies within its mass. It may be insulted due to various types of injuries and may need to be protected during the treatment. There are varieties of materials available for use. They show different properties and can be used in different conditions with their own advantages and disadvantages. These materials are as follows.