Purpose: The purpose of this study was to determine the influence of two finish line
configurations on the marginal accuracy of Procera AllCeram crowns. Materials and
Methods: Twenty mechanized specimens of brass were fabricated for complete-coverage
crowns. Two finish line designs were used: chamfer and rounded shoulder. AllCeram
crowns were fabricated, and the fit of the crowns to the dies was recorded from the
buccal and lingual margins. An image-analysis program was used to measure the gap.
The results were subjected to statistical analysis using a Student’s t test for separate
samples and Student’s paired t test. Results: No significant differences were observed
between the buccal and lingual measurements. When the values of the buccal and
lingual measurements were averaged, there were no significant differences in the
marginal gap, horizontal discrepancy, or internal adaptation of the axial wall, but there
were significant differences in the vertical discrepancy, absolute marginal discrepancy,
and internal discrepancy between the two finish line designs. Conclusion: The marginal
gap was within the range of clinical acceptability. Some of the variables were influenced
by the two finish lines tested. Int J Prosthodont 2003;16:229–232.