Objective
The aim of this study was to investigate the effect of 3 root canal sealers on radiopacity
of root fillings in simulated canals by means of direct digital radiography.
Study design
Thirty simulated root canals in transparent acrylic blocks were prepared with a 4%
tapered, size 25 instrument. A single 4% tapered, size 25 gutta-percha cone was inserted
into each canal. Standardized images of the blocks with an aluminum step-wedge were
obtained by using Digora storage phosphor plates. Then, 3 root canal sealers (Roeko,
Diaket, Pulpdent) were mixed according to the manufacturers’ instructions. The gutta-percha
cones were completely coated with one of the sealers and placed in the identical canal
to the full working length. The images of the blocks were reobtained after sealer
application. The mean gray values (MGVs) of root fillings were measured with or without
the sealer at 3 different levels (1 mm, 6 mm, and 11 mm from apex) by using the Image
Tool program. Each MGV measurement was then converted to its aluminum equivalent by
means of the step-wedge values. A paired t test was used for statistical analysis.
Results
RoekoSeal caused a significant decrease in the radiopacity of the root fillings at
the 1-mm level (P < 0.01). Diaket and Pulp Canal Sealer (PCS) increased the radiopacity of the fillings
at all levels significantly (P < 0.01) except 6- and 11-mm levels of the Diaket specimens (P > 0.05).
Conclusion
The type and the thickness of root canal sealers can influence the radiopacity of
the root fillings.
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Article info
Publication history
Published online: March 21, 2006
Accepted:
November 30,
2005
Received in revised form:
November 30,
2005
Received:
November 30,
2005
Identification
Copyright
© 2007 Mosby, Inc. Published by Elsevier Inc. All rights reserved.
