Cavity Nomaneculture And Matrix Bands

Question 1

How is a matrix designed with restorations in mind?

Answer 1

Rolled edge to help recreate marginal ridges

Slight S shape to help contour proximal contacts properly

Question 2

What is benefit of a wedge when restoring inter-proximally?

Answer 2

A wedge will help secure adaption of the matrix in this area, and also provide tooth separation to ensure a tight contact area – essential for gingival and periodontal health.

Also prevents overhanging restorations at the gingival floor, which would be a plaque trap and require immediate replacement .