Matrix Systems for Restorative Dentistry

Flashcards about Matrix Systems for Restorative Dentistry based on lecture notes.

What is the primary function of a dental matrix system?

Provides a temporary wall for the restoration process.

In which classes of preparations is a dental matrix system used?

Class II, III, and IV preparations.

What are the benefits of using a dental matrix system?

Stabilize and hold material during placement, hold during set-time/curing, restore anatomical contours, restore correct contact, create a smooth surface .

What is another name for the universal retainer system?

Tofflemire retainer system.

From which surface is the Tofflemire retainer commonly positioned?

Buccal surface.

Which matrix system is used as an alternative to secure a band for the missing proximal wall?

Retainerless matrix system.

Where are wedges typically inserted in relation to the matrix band?

Inserted into the lingual embrasure.

What is the purpose of the wedge in a matrix system?

To hold the matrix band firmly against the gingival margin.

What are the different options available for wedges?

Various sizes, forms (triangular or round), and materials (wood or plastic).

What is a key consideration when selecting a wedge?

Must be wide enough to apply pressure to apical and gingival walls.

What is the key criterion for successful wedge placement?

Create a seamless transition where tooth and restoration meet.

What type of matrix is used with anterior composite resin materials?

Clear plastic matrix.

For which class of restoration is a clear plastic matrix typically used on anterior teeth?

Class III or IV restoration.

What is a key advantage of using an anterior matrix system?

No retainer is needed.

What is the purpose of an anterior matrix before etching and bonding?

To protect adjacent teeth from etching and bonding materials.

Where is the anterior matrix placed before etching and bonding?

Placed interproximally.

Why is the matrix pulled tightly around the tooth after composite placement?

To reconstruct its natural contour.

What property of the clear plastic matrix is important for curing?

Allows the curing light to penetrate the material.

Which matrix system is an alternative to a universal retainer and band?

AutoMatrix system.

What is a distinguishing feature of the AutoMatrix system?

No retainer is used.

What Matrix System is specifically designed for primary teeth?

T-Band

Name three benefits of using a dental matrix system

Stabilize and hold material, hold till set/cure, restore anatomy, restore tooth contact, and create smooth surface

What is the alternate name for Tofflemire Retainer System?

Universal Retainer

How wide should a wedge be to affect tooth seperation?

Wider than distance between teeth

Anterior Matrix do not need what piece of equipment to hold it in place?

Retainer

What is another material besides composite that can be used with anterior matrices?

Glass Ionomer

After composite placement, the matrix helps reconstruct its _.

Natural Contour

Why is it important that clear plastic matrix lets in light?

Allows the curing to complete.

What matrix system does not use a retainer?

AutoMatrix

What matrix system is the AutoMatrix a alternative to?

Universal Retainer

What system from the notes is used for primary teeth?

T-band

What class of missing tooth does the matrix act as a temporary wall?

Class II

Class II preparations need the Matrix System.

Universal Retainer

The wedge is placed into the _ embrasure to hold the matrix band.

Lingual

What are the two materials that make the wedges?

Wood and Plastic

What material is use with anterior composite resins?

Plastic

Why is the matrix placed interproximally before etching?

Protect adjactent teeth

The matrix must be pulled ____ _____ the tooth after placement of the filling.

Tightly Around

The does need a retainer to hold it in place.

AutoMatrix

What type of band matrix is used for primary teeth

T-Band