Abstract
Background. This study compared the effect of smear layer on the penetration depth and push-out bond strength of various root canal sealers. Methods. A total of 90 extracted human mandibular premolars were assigned into 2 groups: smear layer preserved and smear layer removed. Then the roots were further divided into 3 subgroups according to the sealer tested: AH 26, BioRoot RCS and MTA Plus. Obturation was performed with gutta-percha and the relevant sealer was mixed with 0.1% rhodamine B. Three 1-mm-thick slices were obtained from the mid-third area of each root. Two slices were selected for the push-out test and the remaining slice was used to calculate the dentinal tubule penetration depth and percentage. Results. The retention of MTA Plus and BioRoot RCS was higher than that of AH 26 when the smear layer was preserved (P<0.05). BioRoot RCS showed the lowest penetration depth when the smear layer was removed (P<0.05). Conclusion. Dentinal tubule penetration of root canal sealers had a limited effect on their adhesion to root canal wall.
Highlights
One of the main objectives of root canal treatment is to establish a fluid-tight seal to prevent contamination of the root canal system with bacteria
An advantage of MTA Plus is the smaller particle sizecompared to MTA.2BioRoot RCS (Septodont, St.Maur-desFosses, France), a new calcium silicate-based root canal sealer which consists of powder and liquid, has been developed for root canal filling
The retention of calcium silicate-based sealers was higher than epoxy resin-based sealer when the smear layer was preserved (P
Summary
One of the main objectives of root canal treatment is to establish a fluid-tight seal to prevent contamination of the root canal system with bacteria. Gutta-percha with an endodontic sealer is the most widely accepted root canal filling material. JODDD, Vol 12, No 4 Autumn 2018 of root canal sealers, the calcium silicate-based, has been introduced. MTA Plus (Avalon Biomed Inc., Bradenton, FL, USA) is a powdered tricalcium and dicalcium silicate-based material that can be mixed with a liquid or a gel. It is used as a root canal sealer when the powder is mixed with gel.[1] An advantage of MTA Plus is the smaller particle sizecompared to MTA.2BioRoot RCS (Septodont, St.Maur-desFosses, France), a new calcium silicate-based root canal sealer which consists of powder and liquid, has been developed for root canal filling. This study compared the effect of smear layer on the penetration depth and push-out bond strength of various root canal sealers
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