The impression as a means for analysis of clinical mistakes in fixed prosthodontics.

Earlier and more recent clinical observations show that mistakes made in the early clinical stages of treatment have a negative effect on the time of effectiveness of the prosthetic treatment and its medicobiological value. Finding the most common mistakes and deviations from the clinical and laboratory protocol is of primary importance for creating a qualitative clinical technique and adequate training programs. On the other hand it is difficult for the practicing dentist to perform self-control in his everyday technique for preparation and taking impressions.