What is the primary purpose of a wedge in restorative dentistry?

The primary purpose of a wedge in restorative dentistry is to provide adaptation of the matrix band, ensuring a proper seal and fit between the band and the tooth structure during the restorative procedure. When placing a matrix band around a tooth to restore its contour and interproximal contact, the wedge helps to secure the band tightly against the tooth, allowing for a more accurate adaptation to the tooth's anatomy. This is crucial for achieving the desired shape and preventing any gaps that could compromise the restoration’s integrity.

By holding the matrix band in a proper position, the wedge aids in the successful placement of the filling material, enhancing the final aesthetics and function of the restoration. It ensures that when the filling material is placed, it fully occupies the cavity preparation without leaking or creating voids, which could lead to the restoration failing prematurely. Overall, the wedge plays a vital role in achieving a high-quality restorative outcome by improving the adaptation of the matrix band.