Question

Which matrix system used for class II posterior restorations is the most common?

Options:
a) Tofflemire matrix system
b) Circumferential matrix system
c) Automatrix system
d) Palodent matrix system
e) Sectional matrix system

Answer 1

The Tofflemire matrix system is the most commonly used matrix system for class II posterior restorations, involving a retainer and a metal band that helps shape the dental filling material.

Step-by-step explanation:

The matrix system that is most commonly used for class II posterior restorations in dentistry is the Tofflemire matrix system. This system involves a retainer that holds a metal band in place around the tooth being restored. The Tofflemire retainer is adjusted to fit snugly against the tooth and the matrix band forms a temporary wall for the placement of dental filling material. The matrix holds the material until it sets, helping to restore the natural shape of the tooth. While other systems like the sectional matrix system are gaining popularity for their ease of use and better contact creation, the Tofflemire matrix system is still widely used and taught in dental schools.