Quantitative microleakage analysis of root canal filling materials in single‐rooted canals

Abstract

The purpose of this study was to analyze the sealing ability of different root canal filling materials over a 6-week period using a glucose penetration model. Forty-six recently extracted human premolars were used in this study. The root canals were enlarged to 40/0.06. Prepared canals were randomly assigned into four groups (n = 10) as follows: Group 1, Gutta-Percha (GP)/AH Plus with cold lateral compaction; Group 2, GP/AH Plus with continuous wave compaction; Group 3, RealSeal SE obturation system; and Group 4, OrthoMTA. The remaining specimens were used as positive and negative controls, and all specimens underwent thermocycling (10,000; 5-55 °C). The sealing ability of all samples was evaluated at 24 h, 1, 2, 4, and 6 weeks using a quantitative glucose leakage model, and scanning electron microscope (SEM) images were taken. A mixed effect analysis using R statistical language was performed. Groups 1, 2, and 4 showed low leakage levels during experimental periods. Group 3 showed low leakage levels for the first 2 weeks; however, the leakage level was significantly increased after 2 weeks compared to negative control group (p < 0.05). In the SEM results, Group 3 showed imperfect dentin bonding, whereas Group 4 showed calcium silicate hydrate short tags, which are formed at the access of the dentin tubules. GP/AH Plus and OrthoMTA showed less microleakage than RealSeal SE obturation system when used as root canal filling materials. Traditional GP/AH Plus sealer and the newly developed OrthoMTA are more appropriate for ideal sealing of the root canals.

Evaluation of the bond strengths of two novel bioceramic cement using a modified thin‐slice push‐out test model

“…20 These short tags formed after hydration of TCS at the interfacial space, 21,22 it can provide physical three-dimensional sealing of dentinal wall by the TCS in the short term. 23 The physicochemical reactions of the hydrated TCS driven by calcium-deficient hydroxyapatite aggregation on tricalcium silicate hydrate further improve the sealing ability of TCS in the long term. 21,22,24 Although the short and long tag formation is observed for both TCSs, there is a difference between the bond strength of dentin.…”

Effect of acidic solutions on the microhardness of dentin and set OrthoMTA and their cytotoxicity on murine macrophage

“…OrthoMTA contains less heavy metals than ProRoot MTA (Dentsply, Tulsa, OK, USA), 21 and was used as root canal filling materials in previous studies. 22 23 It was shown that intratubular mineralization of root canal dentin at the interface of dentin and obturated OrthoMTA by scanning electron microscope (SEM). 22 23 There has been no study about erosive effect of acidic solutions on the OrthoMTA.…”

“… 22 23 It was shown that intratubular mineralization of root canal dentin at the interface of dentin and obturated OrthoMTA by scanning electron microscope (SEM). 22 23 There has been no study about erosive effect of acidic solutions on the OrthoMTA.…”

Evidence of Intratubular Biomineralization in a Root Canal Filled with Calcium Enriched Material over 8 Years

“…Previous in vitro studies reported its use as root canal filling material, showing evidences of intracanal mineralization of root canal dentin at the interface of dentin and obturation material [7,9,10]. However little was known on in vivo data on this issue.…”