National Dental Assisting Examining Board (NDAEB) Practice Exam

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Prepare for the National Dental Assisting Exam with comprehensive quiz questions, including multiple choice and detailed explanations. Equip yourself for success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

In terms of tooth restoration, what does the term 'matrix' refer to?

A mold for impression taking
A supporting structure for fillings
A frame for setting expansion
A type of dental adhesive

The correct answer is: A supporting structure for fillings

The term 'matrix' in the context of tooth restoration primarily refers to a supporting structure for fillings. When a tooth is prepared for a filling, a matrix band is often used to create an enclosed space into which the restorative material can be placed. This matrix band helps to define the shape of the filling and maintains the integrity of the restoration, ensuring that it does not collapse or lose form before the material sets. It essentially acts as a mold for the composite or amalgam material, allowing for a proper contact point with adjacent teeth and a more natural contour of the restored tooth. This understanding is crucial as it highlights the role of a matrix in achieving successful restorations by providing structure and support during the placement of various filling materials.