The head of the mirror is round. It can be used to see parts of the tooth that are not easily visible. It can also be used to see corners in difficult areas. Surgical stainless steel with a matt surface.
When you make a selection, a full page is updated.
Press the spacebar then arrow keys to make a selection.
Use the left/right arrows to navigate through the slideshow, or swipe left or right if you're using a mobile device