The material of choice for a posterior matrix band is::

Question

Quizplus · Accepted Answer

Thin, flexible stainless steel is the material of choice for a posterior matrix band because it is strong enough to create a tight contact between the tooth and the matrix, while still being flexible enough to adapt to the shape of the tooth. Thick, rigid stainless steel is not as flexible and may not adapt to the shape of the tooth properly, while celluloid and copper are not strong enough to create a tight contact.

The Material of Choice for a Posterior Matrix Band Is