Podcast
Questions and Answers
What cavity classifications use a posterior matrix system? (Select all that apply)
What cavity classifications use a posterior matrix system? (Select all that apply)
What is the plural of matrix?
What is the plural of matrix?
Matrices
What is used to hold a posterior matrix band in place intraorally?
What is used to hold a posterior matrix band in place intraorally?
Universal retainer aka the Tofflemire retainer
When a matrix band is placed on the tooth, where is the smaller circumference of the band placed?
When a matrix band is placed on the tooth, where is the smaller circumference of the band placed?
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What instrument is commonly used to contour the matrix band?
What instrument is commonly used to contour the matrix band?
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What additional item is used in the matrix system to reestablish proper contact with an adjacent tooth?
What additional item is used in the matrix system to reestablish proper contact with an adjacent tooth?
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What can result from improper wedge placement?
What can result from improper wedge placement?
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Why can't a stainless steel matrix band be used with composites?
Why can't a stainless steel matrix band be used with composites?
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What is another term for clear plastic matrix?
What is another term for clear plastic matrix?
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What matrix system is an alternative to the universal retainer?
What matrix system is an alternative to the universal retainer?
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What type of matrix system uses a spot welder to fuse the ends together?
What type of matrix system uses a spot welder to fuse the ends together?
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What is another term for a thin polished matrix band used for posterior composites?
What is another term for a thin polished matrix band used for posterior composites?
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Study Notes
Posterior Matrix Systems
- Class II, III, & IV cavity classifications utilize a posterior matrix system.
- To hold a posterior matrix band intraorally, a universal retainer, also known as a Tofflemire retainer, is employed.
Matrix Band Placement
- The smaller circumference of the matrix band is positioned towards the gingiva when placed on the tooth.
- Common instruments for contouring the matrix band include a burnisher or the end of a mirror handle.
Wedge Usage
- Wedges are incorporated in the matrix system to restore proper contact with adjacent teeth.
- Improper placement of wedges can lead to complications such as overhang or cupping.
Material Compatibility
- Stainless steel matrix bands are unsuitable for use with composites because the inorganic filler particles can mark or scratch the band, potentially affecting the setting of the materials.
Types of Matrix
- Clear plastic matrices are also referred to as celluloid strips or mylar strips.
- An alternative to the universal retainer is the automatrix system.
Specialized Matrix Systems
- The spot welded band matrix system employs a spot welder to fuse the ends together.
- The palodent type matrix band is a thin, polished matrix band specifically designed for posterior composites.
Studying That Suits You
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Description
Test your knowledge on Chapter 49 of Modern Dental Assisting with these recall flashcards. Focused on key concepts like cavity classifications and matrix definitions, this quiz will help reinforce your understanding of essential dental assisting terminology.
