Evolution of root canal sealers: An insight story

Abstract

Attainment of ideal root canal treatment comprises various essential factors such as proper instrumentation, biomechanical preparation, obturation, and ultimately depending upon the case, post-endodontic restoration. Main objective of the treatment is to get absolute rid of microbial entity and prevent any future predilection of re-infection. In order to achieve that, proper seal is required to cut down any chance of proliferation of bacteria and future occurrence of any pathology. Although gutta-percha has been the standard obturating material used in root canal treatment, it does not reinforce endodontically treated roots owing to its inability to achieve an impervious seal along the dentinal walls of the root canal. Gutta-percha does not from a monoblock even with the use of a resin-based sealer such as AH Plus because the sealer does not bind to gutta-percha. As a result, a monoblock is formed (consisting of Resilon core material, Resin sealer, bonding agent/primer, and dentin). Another reason of Resilon being a better obturating material could be that the removal of smear layer by ethylenediaminetetraacetic acid (EDTA) after biomechanical preparation may have allowed the root canal filling material and root canal sealers to contact the canal wall and penetrate in the dentinal tubules, which may increase the strength of roots. New silicone-based sealers like Roekoseal automix and the most recent GuttaFlow have some affirmative results regarding solubility and biocompatibility, as compared to other sealers. Methacrylate resin-based sealers and mineral trioxide aggregate (MTA)-based sealers have opened a new horizon for sealers.

Assessment of Marginal Adaptation and Sealing Ability of Root Canal Sealers: An in vitro Study

“…It also has few disadvantages; it cannot bond with root canal dentin and also sealer tends to pull away from the gutta-percha on setting because of its hydrophobic nature. 19 Progressive factors are the lateral and additional channels and other anatomic differences along with periapical pressure which prevents total leakage from treated root channels; there are few areas where viscous material like sealer cannot reach and its untouched during root canal preparation and thus these spaces remain as the culprit for leakage and reduce the chances of success. 8 Under optimal conditions, single-rooted teeth that have been obturated in vitro were used in this study.…”

Dentin Bond Strength Evaluation of Three Root Canal Sealers with Cold Gutta-Percha Lateral Obturation Technique: Push-Out Test Study

“…(3), and Table ( 1). IRoot SP (Group 1) showed the highest mean value of push-out bond strength (7.3±0.2), while MTA Fillapex (Group 3) showed the lowest mean value of push-out bond strength (2.9±0.3).…”

“…Mohammed E Rokaya (1) , Fahd M Hadhoud (1) and MoatazBellah A Alkhawas root fillings' remained the household term, it was realized that in the absence of a sealing cement, such root fillings were frequently associated with clinical and radiographic signs of apical periodontitis. Therefore, developments in endodontic materials have been mainly on the chemistry and properties of the sealer as a technically and biologically important part of the root filling (2) .…”

“…Proper seal is required to prevent any chance of proliferation of bacteria and future occurrence of any pathology. Sealer along with solid obturating material acts synergistically to create hermetic seal (1) .While 'gutta-percha …”

Effect of Placement Techniques on Sealing Ability of Root Canal Sealers

“…To resolve this problem, sealer could be mixed in low powder to liquid ratio and be applied at room temperature. 9 According to Claudia Barthel, Gotz Losche, Stetan Zimmer a lower viscosity of sealer definitely simplifies the placement of master cone and AH-26 can be used at room temperature. AH-26 in combination with lateral condensation leads to less leakage when used at room temperature.…”