The universal retainer is also referred to as the _______ retainer?

The universal retainer is commonly referred to as the Tofflemire retainer. This particular retainer is essential for holding a matrix band in place during restorative procedures, such as filling cavities. The Tofflemire design allows for easy adjustment of the matrix band to accommodate different tooth sizes and shapes, providing a secure fit around the tooth being restored. It is made up of a diagonal slot that holds the band and a locking mechanism that ensures the band remains stationary during the placement of dental materials.

This retainer is named after its inventor, Dr. William Tofflemire, who designed it to facilitate a more efficient and reliable method for achieving tight interproximal contacts in dental restorations. This is particularly important for achieving good restorations that mimic the natural shape and contour of teeth, thereby supporting overall dental health.