Tooth Discoloration Resulting from a Nano Zinc Oxide-Eugenol Sealer.
BACKGROUND
A desirable quality of any endodontic sealer is its ability to be tooth color friendly. Therefore the aim of the present study was to evaluate the tooth discoloration potential of a nano zinc oxide-eugenol (NZOE) sealer.


METHODS
In order to evaluate tooth discoloration, the pulp chamber of 60 human maxillary central and lateral incisors were filled with one of the sealers, naming AH-26 (resin-based sealer), Pulpdent sealer (ZOE-based) and a NZOE experimental sealer. Color measurements was assessed at the baseline (before placement of sealers) (T0), 24 h (T1) and 72 h (T2) h, 1-week (T3), and 1-month (T4) after the placement of sealers using the Easy Shade spectrophotometer. Data were analyzed in SPSS software using one-way ANOVA, and repeated measured ANOVA.


RESULTS
No significant differences were observed when the paired comparison test was performed (P>0.05).


CONCLUSIONS
The tested NZOE sealer had similar tooth discoloration potential in comparison with AH-26 and ZOE sealer.
Dental Research Center, Department of Endodontics, Dental School, Mashhad University of Medical Science, Mashhad, Iran.
Mina
M
Zarei
Dental Research Center, Department of Endodontics, Dental School, Mashhad University of Medical Science, Mashhad, Iran.
Maryam
M
Javidi
Dental school, North Khorasan University of Medical Science , Bojnurd, Iran.
Marzieh
M
Jafari
Dental Materials Research Center, Department of Endodontics, Dental School, Mashhad University of Medical Science, Mashhad, Iran.
Maryam
M
Gharechahi
Department of Orthodontics, Dental School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Pedram
P
Javidi
Student Research Committee (SRC), Mashhad University of Medical Sciences, Mashhad, Iran.
Maryam
M
Shayani Rad
Nano Particle; Root Canal Sealer; Spectrophotometry; Tooth Discoloration; Zinc-Oxide Eugenol