What is a matrix band used for in dentistry?

A matrix band is primarily used to restore the contours and anatomy of a tooth that has experienced decay or damage. When a dentist prepares a cavity for filling, they create a cavity shape, but the surrounding tooth structure must be retained in order to create a strong and effective restoration. The matrix band serves as a temporary wall that shapes the restorative material (such as dental composite or amalgam) into the correct form. This helps ensure that the filling is properly confined to the cavity and restores the appearance and function of the tooth effectively.

In contrast, using a matrix band to hold the jaw in place, isolate a tooth while filling, or apply fluoride treatments does not align with the primary purpose of this dental accessory. Matrix bands do not immobilize the jaw, isolate teeth, or facilitate topical treatments like fluoride application; these tasks are accomplished through different means and instruments specific to those procedures.