Related Experiment Video
Updated: Aug 30, 2026
Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry
Published on: June 6, 2025
[Evaluation of colour differences in fiber post all-ceramic prosthetic restoration by spectrophotometry]
L Bevilacqua1, M Cadenaro, M Biasotto
1Dipartimento di Scienze, Chirurgiche Specialistiche, Università degli Studi di Trieste, Trieste, Italy. l.bevilacqua@fmc.units.it
Aim:
The aim of this study was to evaluate the influence of fiber post on all-ceramic prosthetic restorations, using the spectrophotometer Miniscan XE. Data were recorded according to the CIEL*a*b* system and the color difference (DE) was calculated.
Methods:
Carbon fiber Composipost (RTD) and quartz fiber Lightpost (RTD) posts were used. Square specimens (12x12 mm) were prepared using 9 #1 posts, covered with Z100 (3M) composite layers of different thickness (2, 3 and 4 mm) and color A3; 12x12 mm ceramic specimens (Finesse All Ceramic - 3M) of 2 and 3 mm thickness and color A3, were prepared using both opaque dentin and not.
Results:
With 2 and 3 mm thick ceramic layers, there was no color difference between carbon fiber specimens and quartz fiber specimens. Using the opaque dentin did not determine difference between groups.
Conclusion:
In this study, according to results, a 3 mm thick ceramic layer always produced a DE<1, independently from the endodontic post. However, 2 mm thick ceramic layers were able to cover every kind of endodontic posts, even if with a DE=+/-1.6, and therefore are clinically acceptable.