Chapter 49 Matrix Systems for restorative dentistry.docx

Chapter 49 Matrix systems for Restorative Dentistry 1. **What cavity classifications use a posterior matrix system?** 2. **What is the plural of matrix?** 3. **What type of system is used to hold a posterior matrix band in position intraorally?** 4. **When placing a traditional matrix ba...

Chapter 49 Matrix systems for Restorative Dentistry 1. **What cavity classifications use a posterior matrix system?** 2. **What is the plural of matrix?** 3. **What type of system is used to hold a posterior matrix band in position intraorally?** 4. **When placing a traditional matrix band, where is the smaller circumference of the band placed?** 5. **What instrument is commonly used to contour the matrix band?** 6. **What additional item is used in the Tofflemire matrix system to reestablish proper contact with an adjacent tooth?** 7. **What can result from improper wedge placement?** 8. **What is another term for a clear plastic matrix?** 9. **What matrix system is an alternative to the Tofflemire retainer?** 10. **What is another term for a thin, coated, nonstick matrix band used for posterior composites or amalgam restorations?** 11\. What part of the Tofflemire matrix retainer tightens the band securely within? The outer knob is used to tighten or loosen the spindle within the diagonal slot. 12\. A wedge is most commonly placed from the \_\_\_\_\_\_\_\_ side into the interproximal space. A wedge is inserted into the lingual side to hold the matrix band firmly against the gingival margin of the preparation. 13\. Where is the slotted surface of a Tofflemire retainer always positioned? Toward the gingiva. 14\. When is the celluloid band placed during an anterior composite resin restoration? The matrix is placed between the teeth before etching and priming of the tooth to protect adjacent teeth from these materials. 15\. What matrix system is best for primary teeth? The T-Band is designed to provide the correct width and depth needed for proper restoration of primary molars.