What is the purpose of using green stones in amalgam finishing?

The purpose of using green stones in amalgam finishing primarily relates to their ability to remove bulky or excess amalgam from the restoration. Green stones, which are typically made of a silicon carbide material, have a coarser grit compared to other finishing instruments, enabling them to efficiently contour and reduce excess material without significantly altering the underlying anatomy of the tooth or damaging adjacent structures. This step is crucial in achieving an appropriate restoration height and contour, making it easier for subsequent finer finishing and polishing steps.

By effectively removing excess amalgam, the finishing process helps ensure that the restoration fits well with the existing tooth structure and aligns correctly with the occlusion, promoting overall oral health and function. The use of green stones is an important part of the amalgam finishing procedure to provide a well-contoured and finished restoration.