Correlation between sealer penetration and microleakage following the use of MTAD as a final irrigant

Abstract

The relationship between sealer penetration and apical microleakage following the use of MTAD as an irrigant in root canal procedures was evaluated. A collection of 120 human teeth was divided into three groups of 40 in each group. The final rinse was varied as follows: group 1 - the final rinse was saline solution, group 2 - ethylene diamine tetraacetic acid and for group 3 - MTAD. Each group was then divided into two subgroups (20 teeth) and filled with gutta percha and either AH Plus or Dorifill sealer. Half of the teeth were selected for dye penetration testing and the sealer penetration in the remaining teeth was evaluated using scanning electron microscope. There were no significant differences between the three irrigants, but there was less dye penetration in teeth sealed with AH Plus than Dorifill. Penetration of the sealer was better in the MTAD and ethylene diamine tetraacetic acid groups than in the saline group. Statistically, there was no significant difference between the sealer penetration into the dentinal tubules and the dye penetration.

Apical microleakage of different root canal sealers after use of maleic acid and EDTA as final irrigants

“…18 There exists literature suggesting that there is no correlation between smear layer, leakage, and bonding strength of the sealers. 19,20,21 Several methods have been used to evaluate the sealing ability of root canal filling materials. 12,17,22 Linear dye microleakage is a commonly used technique to assess leakage in root canals.…”

Lack of correlation between tubular dentine cement penetration, adhesiveness and leakage in roots filled with gutta percha and an endodontic cement based on epoxy amine resin

“…These materials not only act as antibacterial agents, theoretically speaking, but can also optimize the quality of the seals provided by these penetrations. This hypothesis is based on the concept that tubular dentine cement penetration considerably increases the contact surface of the filling material with the root canal walls, thereby improving the seal 6,19,24 . The possibility of improving the adhesiveness of the filling materials also has the ultimate goal of preventing leakage 13 .…”

“…However, these hypotheses have not yet been completely clarified in the literature, and few studies have been performed to investigate these possible correlations 4,6,12,13,19,23,24 .…”

Comparison of Root Canal Sealer Penetration and Distribution by Novel Reciprocating NITI Spreader with Sonic, Ultrasonic and Rotary Methods: A Confocal Laser Scanning Microscopic Study

“…[1] A few investigators did not observe any significant correlation between degree of micro leakage and sealer penetration into dentinal tubules. [2] But majority of studies suggested that mechanical interlocking of sealer inside dentinal tubules following smear layer removal improve dislocation resistance of root fillings and decrease microleakage. [3][4][5] It was observed that the smear layer obstructed the penetration of sealers into the tubules.…”

“…[6,7] Currently, ethylenediaminetetraacetic acid (EDTA) and sodium hypochlorite (NaOCl) are used to remove the smear layer and improve sealer penetration. [8] Bacteria have been shown to penetrate 150 to 400 μm into dentinal tubules. The ability of the sealers to penetrate into the dentinal tubules may be especially beneficial to control or kill bacteria that may be located there.…”