Comparison of Radiopacity of Six Endodontic Sealers

Abstract

Introduction:Optimal radiopacity is one of the properties required for a root canal sealer that helps the distinction between the sealer and surrounding anatomic structures and evaluation of the quality of root filling. So, the purpose of this study was to evaluate the radiopacity of six root canal sealers at different focal distances. Materials and Methods:In this in vitro study, six endodontic sealers (ADSEAL, AH26, AH plus, Dorifill, MTA fillapex, and ZOE), were prepared and placed in a mold with 1mm thickness and 10mm diameter. The specimens were positioned alongside an aluminum step wedge on a digital detector (occlusal size 76×57 mm). Radiographic imaging was performed at 15 and 30cm focal distances and radiopacity of each specimen was measured.One-way ANOVA and paired t-test were used and p<0.05 was considered significant.Results: All sealers were found to be more radiopaque than 3 mm aluminum. At 15cm focal distance, the radiopacity values were 31.7, 60.68, 121.48, 52.4, 48.6, and 48.08 aluminum for ADSEAL, AH26, AH plus,Dorifill, MTA fillapex and ZOE, respectively. At 30cm focal distance, the figures were 80. 32, 153.6, 253.6, 139.92, 144.08, and 129.92 for ADSEAL, AH26, AH plus,Dorifill, MTA fillapex and ZOE, respectively. Conclusion:All of the sealers investigated in this study met the standards for minimal radiopacity. AH plus had the highest radiopacity at both focal distances. Radiopacity decreased by increasing the focal distance and the decline was statistically significant for AHplus.

Comparison of push‐out bond strength of endodontic sealers after root canal drying with different techniques

“…Several manufacturers recommend that the root canals must remain moist to benefit from the hydrophilic properties of sealers. However, they do not provide precise clinical instructions on how to achieve an ideal level of residual moisture before application of their products (Ehsani et al, 2014). Since no clear protocol is available for achieving an ideal state of residual moisture in the root canal (Zmener et al, 2008), different chemical agents such as different concentrations of alcohol have been tested for dentin moisture removal (Engel et al, 2005; Nagas et al, 2012; Stevens et al, 2006).…”

“…In total, the technique of drying based on the type of sealer should be carefully selected as a critical step in endodontic treatment (Ehsani et al, 2014). It appears that drying the canal with ethanol or paper point along with the use of bioceramic sealers can enhance the adhesion of sealer to dentin.…”

Radiopacity of premixed and two-component Calcium silicate-based Root Canal sealers

“…If exposure time for a given target distance is not optimal, material could, on the radiographic image, be represented only using a fraction of the full grey-scale spectrum 12 . Also, it was shown that the increase of focal distance (tube to sensor) decreased radiopacity values of endodontic sealers 13 . Even slight differences between material radiopacity obtained using different sensors and/or exposure parameters can affect classification of the materials particularly if determined values are close to a given standard.…”