3. Matrices Utilized for Restoration of Class II (Ruble)

Proximal contact areas on posterior teeth

• Occlusal view: contacts are placed more buccally and there are larger lingual embrasures

• Buccal view: contacts are placed in the middle 3rd or near junction of middle and occlusal 3rd EXCEPT mesial of mandibular 1st premolar, which is in the occlusal 3rd

Tofflemire is what type of matrix? What are its components?

• CIRCUMFERENTIAL

• Retainer, band and wood wedge

What are the shapes and functions of the wedge?

• triangular or round

• Functions: Seal the gingival cavosurface to prevent excess and separates teeth to create contact

• The opening of the U on the head of the tofflemire retainer always faces the ______

• The retainer is always placed on the ______ side of the tooth

• You must ALWAYS use a _____ to seal the gingival margin

• The opening of the U on the head of the tofflemire retainer always faces the gingiva

• The retainer is always pl

  

  aced on the buccal side of the tooth

• You must ALWAYS use a _____ to seal the gingival margin