Matrix Systems for Restorative Dentistry

These flashcards cover key concepts, definitions, and processes related to matrix systems used in restorative dentistry.

What is the main purpose of a dental matrix system in restorative dentistry?

Provides a temporary wall for the restoration process.

What are two benefits of using a matrix system during the restorative process?

Stabilizes and holds material during placement; restores interproximal anatomical contours.

What are the five features of a matrix system?

Stabilizes material, holds during curing, restores anatomical contours, restores interproximal contact, creates smooth surface.

Differentiate between the anterior and posterior matrix systems.

The anterior matrix system is used for class III or IV restorations and does not require a retainer; the posterior system typically uses a Tofflemire retainer.

What is the purpose of a wedge in the restorative process?

To hold the matrix band against the gingival margin and ensure proper contour and fit.

Name a component of the Tofflemire retainer and its purpose.

Spindle pin; stabilizes the band in the holder.

What types of restorative classifications is a posterior matrix used for?

Class II, III, and IV preparations.

How should the matrix band be positioned during placement?

The larger side (occlusal edge) should be facing toward the occlusal part of the tooth.

What is a key criterion for selecting a wedge in restorative dentistry?

Must create a seamless transition between the tooth and restoration.

What does the term 'retainerless matrix system' refer to?

A type of matrix system that does not use a retainer to hold the band in place.

What is the main advantage of using clear plastic matrices in anterior restorations?

They allow the curing light to penetrate the material for effective curing.

What is the purpose of the diagonal slot in the Tofflemire retainer?

Used to position the ends of the matrix band into the vise.

List two types of matrix systems designed for primary teeth.

T-band and spot-welded band.

What is the common material used for matrix bands in restorative dentistry?

Thin, flexible stainless steel.

Why is proper wedge placement critical during restorative procedures?

Improper placement can lead to an overhang or cupping of the restoration.

What should be done before contouring the matrix band?

Place it on a paper pad and rub against the inner surface with a burnisher or mirror handle.