Only Mishap

I am really hoping that last Wednesday was my only mishap that I will have on a patient.  At least to that extent.  I had my pt come back to start scaling her teeth last week.  I was doing pretty well and had completed one quadrant.  I had gone back over some teeth to make sure that I hadn't missed any calculus.  I didn't feel like I was applying very much lateral pressure, more of an exploratory stroke, yet as I moved toward the incisal edge from the gingival margin, a chunk of composite filling came off!!!  I audibly gasped and terrified began trying to find where it went in my pt's mouth.  I couldn't believe it!  My instructor was right there with me and got into my pt's mouth and felt the area.  The reason it came off so easily is do to some decay.  So, really it could have happened to anyone!  But it happened to me.  I feel so bad.  My goal for next time is to not make fillings come out of my patients teeth!  I think that is a pretty good goal.