Which statement is correct when using a Tofflemire matrix band and retainer?

The correct statement indicates that the matrix retainer is positioned on the buccal side while the wedge is placed from the lingual side. This configuration is essential for proper placement and function of the Tofflemire matrix band.

When the matrix retainer is positioned buccally, it provides a stable foundation for holding the matrix band in place around the tooth that is being restored. The wedge, inserted from the lingual side, helps to tightly adapt the matrix band against the tooth structure. This adaptation is crucial for preventing material leakage during the filling process and ensuring that a proper contour is achieved for the restoration. By using this approach, the wedge not only secures the band but also helps in creating a natural contact point with adjacent teeth.

Positioning the matrix band and wedge correctly prevents issues such as contour distortion and ensures a quality restoration. This technique is standard practice in restorative dentistry, especially for class II restorations where the proximal surface of the tooth needs attention.

Using a wedge is critical when working with a Tofflemire matrix band, as it aids in achieving proper anatomical form and prevents material from flowing beyond desired boundaries. Thus, each component's proper alignment and function are pivotal for a successful restoration.