What is the function of a burnisher during the placement of a matrix band?

The function of a burnisher during the placement of a matrix band is primarily to contour the band and create a contact point. When a dentist places a matrix band around a tooth to restore its shape and support during a filling, the burnisher can be used to smooth and adapt the curve of the band to fit the tooth anatomy precisely. This helps ensure that the interproximal contacts are well-defined, which is critical for the proper function of the tooth and the overall occlusion. A well-contoured band helps in obtaining a good seal, thus preventing material leakage during the restorative procedure and contributing to the longevity of the restoration.

The burnisher also serves a vital role in refining the margins of the restoration and enhancing aesthetic outcomes by ensuring that the contact point mimics the natural tooth structure.