One of the most nerve wracking step of class II preparations is making the proximal box. Still, this will be a very easy step if only you will observe proper hand rests and maintaining a good enamel wall to protect the adjacent tooth. But what if will accidentally nick the adjacent surface of the tooth? If it is a minor nick, use a polishing bur or a polishing strip to smooth them out.

ERRORS

1.  No firm finger rests.
2. Did not have a good enamel wall, thick enough to protect the adjacent surface.
3. Used bur to totally remove the enamel shell.

TROUBLESHOOTING

1. Small nicks can be smooth out with polishing strips and polishing burs.