DA201 Assignment Chapter 49 Recall Questions

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School

Medix School of Health Care *

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Course

201

Subject

Mechanical Engineering

Date

Apr 3, 2024

Type

docx

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1

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DA201 Assignment: Chapter 49 Recall Questions 1. What cavity classifications use a posterior matrix system? Class II restoration uses a posterior matrix system 2. What is the plural of matrix? The plural term for matrix is matrices 3. What is used to hold a posterior matrix band in position intraorally? Universal retainer 4. When a matrix band is placed on the tooth, where is the smaller circumference of the band placed? The smaller circumference of the band is the gingival edge and is always positioned toward the gingiva. 5. What instrument is commonly used to contour the matrix band? A burnisher or an end of the mirror handle 6. What additional item is used in the matrix system to reestablish proper contact with an adjacent tooth? A wedge 7. What can result from improper wedge placement? • Trapped food, which could result in possible recurrence of decay • Make it difficult to floss • Contribute to inflamed gingival tissue and periodontal disease • Cause long-term bone loss 8. What is another term for a clear plastic matrix? Celluloid strip or Mylar strip 9. What matrix system is an alternative to the universal retainer? An alternative to the use of a universal retainer and band is the Auto Matrix system 10.What type of matrix system uses a spot welder to fuse the ends together? The spot-welded band 11.What is another term for a thin polished matrix band used for posterior composites? Tofflemire retainer
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