Expansion of Gutta-percha in Contact with Various Concentrations of Zinc Oxide–Eugenol Sealer: A Three-dimensional Volumetric Study

Chandrasekhar, Veeramachaneni; Morishetty, Pradeep Kumar; Metla, Swarna Latha; Raju, R.V.S Chakradhar

doi:10.1016/j.joen.2011.02.014

Cited by 22 publications

(28 citation statements)

References 23 publications

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“…[1234] Several techniques have been proposed to obtain optimal adherence of gutta-percha (GP) to root canal walls[567] to minimize microbial leakage[8] and to ensure treatment success. [8910] Since the introduction of the warm vertical condensation technique by Schilder, in 1967,[10] a number of clinical placement techniques involving warm GP have been developed. [4911] However, there are no reports comparing different brands of thermoplasticized GP with respect to their chemical composition and thermal behavior.…”

Section: Introductionmentioning

confidence: 99%

“…[8910] Since the introduction of the warm vertical condensation technique by Schilder, in 1967,[10] a number of clinical placement techniques involving warm GP have been developed. [4911] However, there are no reports comparing different brands of thermoplasticized GP with respect to their chemical composition and thermal behavior.…”

Section: Introductionmentioning

confidence: 99%

“…[9121314] GP expands slightly when heated, a desirable trait for endodontic filling material. [15] This physical property manifests itself as an increase in volume of material that can be compacted into a root canal cavity.…”

Section: Introductionmentioning

confidence: 99%

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Chemical composition and thermal behavior of five brands of thermoplasticized gutta-percha

et al. 2013

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Objective:The aim of this study was determine the chemical composition and thermal behavior of Thermafil (TH), Microseal Cone (MC), Microseal Microflow (MF), Obtura (OB) and Obtura Flow (OF). In addition, their thermal behavior in response to temperature variations was studied by differential scanning calorimetry (DSC) to determine the temperature at which gutta-percha switches from the beta to alpha form, and from the alpha to the amorphous phase.Materials and Methods:The organic and inorganic fractions were separated by dissolution in chloroform. Gutta-percha (GP) was precipitated with acetone. The inorganic fraction was analyzed via Elemental Microanalysis. Energy Dispersive X-ray Microanalysis and X-ray Diffraction were used to identify the chemical elements and compounds (BaSO4 and ZnO). Thermal analysis was conducted using DSC.Results:The organic and inorganic fractions ranged from 21.3% and 26.9% of weights, respectively. MC and MF showed the highest percentages of organic compounds (P = 0.0125). All specimens exhibited two crystalline transformations when heated from ambient temperature to 130°C. MC presented the highest percentage of GP.Conclusions:No correlation was observed between chemical composition and thermal behavior. Each of the products showed thermal behavior that is typical of beta-phase gutta-percha.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical composition and thermal behavior of five brands of thermoplasticized gutta-percha

et al. 2013

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“…They concluded that increasing the ratio of eugenol in sealer resulted in volumetric increase of GP [ Figure 1]. [13] It is cerebrated that the free eugenol component of freshly mixed ZOE sealer can seep out and cause various cytotoxic effects on human gingival fibroblasts, periodontal ligament (PDL) cells, and osteoblast-like cells. [13,14] However, Haseih et al [15] reported that leakage of eugenol into periapical tissues is very low, and it dramatically decreases over time.…”

Section: Conventional Root Canal Sealermentioning

confidence: 99%

Evolution of root canal sealers: An insight story

Tyagi

Mishra

Tyagi

2013

European Journal of General Dentistry

110

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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.

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“…4,5,6,7,8 Despite these beneficial features, gutta-percha shows no adhesion to dentine, resulting in gaps between the cone and root canal walls. 9 In root canal treatment, the ideal result is to insert the largest volume of gutta-percha and minimum amount of sealer inside Declaration of Interests: The authors certify that they have no commercial or associative interest that represents a conflict of interest in connection with the manuscript.…”

Section: Introductionmentioning

confidence: 99%

Volume of sealer in the apical region of teeth filled by different techniques: a micro-CT analysis

et al. 2016

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Abstract:The volume of sealer in the apical 1 mm of teeth filled using different techniques was evaluated by micro-commuted tomography (micro-CT). Sixty-four maxillary central incisors were prepared using NiTi rotary instruments. Teeth were randomly distributed into four groups according to root canal sealers (AH Plus, Endofill, Sealapex, and Sealer 26) and subdivided into two subgroups according to the filling techniques (active and passive lateral condensation; n = 8 each). Subsequently, teeth were examined using the 1174 SkyScan micro-CT device. Images were reconstructed using the NRecon software, and the sealer volume (mm 3 ) in the apical region was analyzed using the two-way ANOVA and post-hoc Student-Newman-Keuls test (α = 0.05). The lowest volume of sealer was observed in teeth filled with Sealapex (0.100 ± 0.009) and Endofill (0.103 ± 0.010). The highest volume was observed in teeth filled with AH Plus (0.112 ± 0.008) and Sealer 26 (0.109 ± 0.018) (p > 0.05). Regarding the filling technique, a lower sealer volume was observed using the active lateral condensation technique compared with that using the passive lateral condensation technique (0.100 ± 0.010 vs. 0.111 ± 0.012) (p < 0.05). Therefore, the lowest volume of sealer was observed in teeth filled with Sealapex and Endofill using the active lateral condensation technique.

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Expansion of Gutta-percha in Contact with Various Concentrations of Zinc Oxide–Eugenol Sealer: A Three-dimensional Volumetric Study

Cited by 22 publications

References 23 publications

Chemical composition and thermal behavior of five brands of thermoplasticized gutta-percha

Chemical composition and thermal behavior of five brands of thermoplasticized gutta-percha

Evolution of root canal sealers: An insight story

Volume of sealer in the apical region of teeth filled by different techniques: a micro-CT analysis

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