scholarly journals Comparative study of the sealing ability of a polydimethylsiloxane-based root canal sealer

2005 ◽  
Vol 16 (2) ◽  
pp. 145-148 ◽  
Author(s):  
Nickolaos Economides ◽  
Beltes Panagiotis ◽  
Ioannis Kolokouris ◽  
Christos Gogos ◽  
Ioannis Kokorikos
Keyword(s):  
Root Canal ◽  
Fluid Transport ◽  
Transport Model ◽  
Smear Layer ◽  
The Other ◽  
Human Teeth ◽  
Root Canals ◽  
Gutta Percha ◽  
Sealing Ability ◽  
Root Canal Sealers

The purpose of this study was to compare the sealing ability of three root canal sealers, RSA (polydimethylsiloxane sealer), Endion (glass-ionomer sealer) and Topseal (epoxy resin sealer), with and without smear layer removal. Ninety extracted human teeth were selected and assigned to 6 groups (n=15), according to the following protocols: in 3 groups, the smear layer was left intact and the root canals were obturated with gutta-percha points and RSA, Endion and Topseal, respectively; in the other 3 groups, the smear layer was removed and the root canals were obturated in the same way as described above. Microleakage was measured at 7 days, 1 month and 2 months, using the fluid transport model. The results were expressed in µL/24 h. Data were analyzed statistically by Kruskall-Wallis and Mann-Whitney non-parametric tests. The results showed that the Topseal group without smear layer leaked significantly less (p<0.05) than the RSA group without smear layer, at all experimental periods. No statistically significant differences (p>0.05) were found among the other groups, at the established evaluation intervals. The findings of this study showed that the polydimethylsiloxane sealer (RSA) did not yield better sealing ability than the other sealers, either in the presence or in the absence of smear layer. Topseal had the least microleakage from the root canal sealers evaluated.

scholarly journals Comparative study of coronal sealing ability using root cross sections method

2007 ◽  
Vol 54 (4) ◽  
pp. 224-230
Author(s):  
Dejan Markovic ◽  
Vesna Zivojinovic ◽  
Slavoljub Zivkovic
Keyword(s):  
Cross Sections ◽  
Root Canal ◽  
Smear Layer ◽  
Blue Dye ◽  
Human Teeth ◽  
Root Canals ◽  
Dye Penetration ◽  
Gutta Percha ◽  
Significant Difference

Objective: An in vitro comparison of coronal microleakage of three root canal sealers was performed using the dye leakage method. Methodology: Ninety-eight single-rooted human teeth were instrumented and randomly allocated to two groups. In the first group, root canals were treated with EDTA to remove the smear layer. The roots in both groups were obturated using laterally condensed gutta-percha and Sealapex, AH-26 or Ketac-Endo as the sealer. The teeth were suspended in 1% methylene blue dye for 6 days. The teeth were then rinsed, sectioned perpendicular to the long axis and evaluated for coronal dye penetration. Results: In general, Ketac-Endo root canal sealer showed greater dye penetration than Sealapex and AH-26. A statistically significant difference in the coronal penetration of the dye was found in the group with intact smear layer. Conclusion: Highly significant differences between AH-26 and Ketac-Endo (p < 0.001) and Sealapex and Ketac Endo (p < 0.001) were found.

scholarly journals Evaluation of apical microleakage of teeth sealed with four different root canal sealers

2006 ◽  
Vol 14 (5) ◽  
pp. 341-345 ◽  
Author(s):  
Fábio Dultra ◽  
Juliana Machado Barroso ◽  
Laise Daniela Carrasco ◽  
Alexandre Capelli ◽  
Danilo M. Zanello Guerisoli ◽  
...  
Keyword(s):  
Root Canal ◽  
Methyl Salicylate ◽  
The Other ◽  
Root Canal Sealer ◽  
Root Canals ◽  
Dye Penetration ◽  
Gutta Percha ◽  
India Ink ◽  
Ah Plus ◽  
Root Canal Sealers

OBJECTIVES: to compare the apical sealing ability of four root canal sealers. MATERIAL AND METHODS: forty extracted human maxillary canines were instrumented 1 mm short of the anatomical apex and randomly assigned to four groups (n=10), according to the root canal sealer used for obturation: Endofill, AH Plus, EndoREZ and Epiphany. Root canals were obturated with gutta-percha points, except for the Epiphany group, in which resin points (Resilon) were used. The teeth were immersed in India ink for seven days and clarified using methyl salicylate. The extent of apical dye penetration was measured with a measuroscope in all aspects of the canal. RESULTS: AH Plus (0.02 mm ± 0.07), Epiphany (0.00 mm ± 0.00) and EndoREZ (0.32 mm ± 0.62) did not differ statistically to each other (p>0.01). EndoFill presented the highest dye penetration mean (0.83 mm ± 0.73) and was statistically different from the other sealers (p<0.01). CONCLUSION: the resin-based root canal sealers presented lesser apical microleakage than the zinc oxide and eugenol based sealer. No statistical differences were observed among resin based sealers.

scholarly journals "In vitro" evaluation of the apical sealing of root canals obturated with different techniques

2003 ◽  
Vol 11 (3) ◽  
pp. 181-185 ◽  
Author(s):  
Viviane Haiub Brosco ◽  
Norberti Bernardineli ◽  
Ivaldo Gomes de Moraes
Keyword(s):  
Continuous Wave ◽  
The Other ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Root Canals ◽  
Gutta Percha ◽  
Sealing Ability ◽  
Better Than ◽  
Positive Controls

The purpose of this study was to compare the apical sealing of root canals obturated with different techniques. One hundred-six human mandibular incisors were submitted to instrumentation by means of the step-back technique. After instrumentation, one hundred teeth received an impermeable coating on the external surfaces of the crown and root (except for the area nearby the apical foramen). Afterwards, they were divided in five groups containing twenty elements each, according to the obturation technique employed: 1. lateral condensation with Kerr file; 2. continuous wave of condensation technique with System B; 3. thermoplasticized injectable gutta-percha technique with the Ultrafil system; 4. mechanically thermoplasticized gutta-percha with the JS Quick-Fill system and 5. thermoplasticized gutta-percha associated to a master cone with the Microseal system. The six remaining teeth were employed as negative and positive controls. After obturation, the access cavities were sealed and the teeth were immersed in aqueous 2% methylene blue dye for 72 hours at 37ºC. After that, the teeth were longitudinally sectioned and the apical microleakage was evaluated in a stereomicroscope. The Microseal system presented the best apical sealing ability, followed by System B, JS Quick-Fill, Ultrafil and the lateral condensation technique. The statistical analysis of the results demonstrated that: 1. the Microseal system presented an apical sealing similar to System B and better than the other groups; 2. System B presented better apical sealing than the lateral condensation technique, being similar to the other groups; and 3. the lateral condensation, Ultrafil and JS Quick-Fill groups demonstrated similar sealing ability.

scholarly journals The effect of different irrigation techniques on the quality of cleaning of root canal walls

2008 ◽  
Vol 55 (4) ◽  
pp. 221-228
Author(s):  
Violeta Pavlovic ◽  
Slavoljub Zivkovic
Keyword(s):  
Root Canal ◽  
Smear Layer ◽  
Sodium Hypochlorite Solution ◽  
Efficient Removal ◽  
Human Teeth ◽  
Root Canals ◽  
Group I ◽  
Different Types ◽  
The Difference

Aim: To evaluate the effect of irrigation techniques, i.e. different types of irrigation needles, on the quality of cleaning of root canal walls using scanning electron microscopy (SEM). Material and Method: The study was conducted on 16 extracted, single-rooted, human teeth. The samples were allocated to two experimental groups depending on the type of the irrigation needle. Conventional needles were used for the irrigation of Group I and laterally perforated ones for Group II. All root canals were instrumented using K files and the Step-back technique. During instrumentation, all samples were irrigated with 2.5 % sodium hypochlorite solution followed by final irrigation with 17 % EDTA for 1 min. After that, all samples were irrigated with 10 ml of distilled water. The roots were, then, sectioned longitudinally and middle one third of each root canal was analyzed using SEM. Quantitative analysis was based on criteria by H?lsmann et al. Results: The obtained results showed that the more efficient removal of debris and the smear layer was accomplished in the group of samples irrigated using laterally perforated needles than conventional needles. The difference between the investigated irrigation techniques were statistically significant (p<0.01). Conclusion: The use of laterally perforated needles for irrigation allows more efficient cleaning of root canal walls, i.e. the removal of debris and the smear layer.

scholarly journals Radiographic analysis of root canal fillings: influence of two sealers on the perception of voids

2010 ◽  
Vol 21 (2) ◽  
pp. 142-147 ◽  
Author(s):  
Augusto Bodanezi ◽  
Etiene de Andrade Munhoz ◽  
Norberti Bernardineli ◽  
Ana Lúcia Álvares Capelozza ◽  
Ivaldo Gomes de Moraes ◽  
...  
Keyword(s):  
Sensitivity And Specificity ◽  
Root Canal ◽  
Ex Vivo ◽  
Radiographic Analysis ◽  
Radiographic Images ◽  
Significance Level ◽  
Root Canals ◽  
Gutta Percha ◽  
Root Canal Sealers

The aim of this ex vivo was to investigate if two radiopaque root canal sealers with different formulations would influence the radiographic perception of root canal fillings. The root canals of 48 extracted maxillary canines were prepared and randomly assigned to 3 groups of 16 specimens each. In each group, the root canals were filled by lateral condensation of gutta-percha and one of the tested sealers: Endométhasone, Sealer 26, or a non-radiopaque sealer. A through-and-through void was simulated in half of the specimens from each group (n=8). The buccolingual radiographic images obtained were randomly interpreted for voids existence by a radiologist and an endodontist. The differences in sensitivity and specificity between groups and examiners were compared using, respectively, Fisher's Exact and McNemar tests at 5% significance level. Both radiopaque sealers caused a significant decrease in sensitivity at the coronal part of fillings. The use of Endométhasone increased specificity values for both coronal and apical portions of the root canal fillings. In conclusion, the tested sealers influenced the radiographic perceptions of laterally condensed root canal fillings in a different way.

scholarly journals The Effect of Root Canal Irrigation with Combination of Sodium Hypo-chlorite and Chlorhexidine Gluconate on the Sealing Ability of Obturation Materials

2014 ◽  
Vol 8 (1) ◽  
pp. 184-187 ◽  
Author(s):  
Hamed Homayouni ◽  
Nima Moradi Majd ◽  
Heidar Zohrehei ◽  
Behrad Mosavari ◽  
Mamak Adel ◽  
...  
Keyword(s):  
Root Canal ◽  
Chlorhexidine Gluconate ◽  
Smear Layer ◽  
Fluid Filtration ◽  
Layer Removal ◽  
Gutta Percha ◽  
Sealing Ability ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

Objectives: The aim of this study was to evaluate the effect of the precipitate that was formed by combining Sodium Hypochlorite (NaOCl) and Chlorhexidine Gluconate (CHX) on the sealing ability of root canal obturation materials. Materials and Methods: The fluid filtration method was conducted on a total of 100 roots. Samples were randomly divided into two control (n=5) and three experimental groups (n=30). The samples in group 1 were irrigated with 1.5 mL of 2.5% NaOCl, and then the smear layers of the teeth were removed by 17% EDTA, while the specimens of group 2 were irrigated by 1.5 mL of 2.5% NaOCl and 1.5 mL of 2% CHX; after the smear layer removal, a final flush with 1.5 mL of 2.5% NaOCl was performed. The samples of group 3 were irrigated the same as group 1 but after the smear layer removal canals were irrigated again with 1.5 mL of 2.5% NaOCl and then a final flush with 1.5 mL of 2% CHX was performed. Teeth were obturated with gutta-percha and AH26 sealer and after seven days, microleakage was evaluated by the fluid filtration technique. The results were analyzed by the ANOVA and Tukey's test. Results: The samples in group 3 had significantly greater microleakage compared to teeth in group 1, 2 (p<0.05), and the specimens in group 1 showed significantly less amount of microleakage than samples in group 2, 3 (p<0.05). Conclusion: The presence of the precipitate that is formed due to interaction between NaOCl and CHX has negative effect on the sealing ability of gutta-percha and AH26 sealer.

scholarly journals Endodontic Irrigants and Their Activation Efficacy on Cleansing Post-Space Root Canal Walls

Prosthesis ◽  
2021 ◽  
Vol 3 (4) ◽  
pp. 406-414
Author(s):  
Manuela Marchese ◽  
Pontoriero I. K. Denise ◽  
Edoardo Ferrari Cagidiaco ◽  
Alfredo Iandolo ◽  
Simone Grandini ◽  
...  
Keyword(s):  
Root Canal ◽  
Continuous Wave ◽  
Smear Layer ◽  
The Other ◽  
X Rays ◽  
Ultrasonic Activation ◽  
Gutta Percha ◽  
Bonding System ◽  
Group A ◽  
Group B

The aim of this study was to evaluate the efficacy of activated irrigants (EDTA e NaOCL) during the cleansing of root walls, of the smear layer, of the debris, and gutta-percha after the preparation of the restorative space. Twenty single and multi-rooted (n = 20) have been collected. All samples were prepared by the same operator, using Nickel-titanium rotating instruments (Mtwo) through the Simultaneous Shaping Technique. The continuous-wave of condensation technique of obturation was used. To all specimens, the restorative space has been made, leaving 5 mm of apical gutta-percha, and postoperative periapical X-rays were performed. The samples were randomly divided into two groups: Group (A): cleansing of the root walls with ultrasonic activation of the irrigants (NEWTRON P5 XS; Satelec Acteon); Group (B): radicular walls wash without ultrasonic activation of endodontic irrigants (NaOCl 5.25% and EDTA 17%). Both dental sample groups were cut longitudinally with a low-speed saw (Isomet); the samples were observed by using a scanning electron microscope (Jeol, Jsm-6060LV) in order to evaluate: (1) the amount of debris/smear layer; (2) the mount of obstruction of dentinal tubules found in the two groups; and (3) evaluation of the presence of gutta-percha. Then, the other five samples each group (with and without ultrasonic activation) were prepared following the same protocol. Then, a universal bonding system (G-Praemio Bond, GC) and a layer of a flowable resin composite (Gaenial Flow, GC) were light-cured and used on top of the prepared root canal walls. The samples were cut in two pieces along the long axis of the root. Then, half sample teeth were kept in an acidic solution (37% HCl) for 48 h in order to completely dissolve dental structures and to have a direct view of resin tags formation under SEM. The other half was prepared to observe the adhesive interface under SEM. The amount of debris was not satisfactory in 9 out of 10 cases in Group B, while in Group A, which has been treated with ultrasounds, the result was either good or great in most of the samples. For the sample group treated with ultrasound, the tubules were evaluated as perfectly clean in 9 out of 10 cases, instead, the results are unsatisfactory for 9 out of 10 cases of group B not treated with ultrasound. Differences between Group A and B were statistically significant. With respect to the presence of debris and tubules obstruction treatment with ultrasonic activation, it offers with no doubt better results. When ultrasonic activation is used in combination with endodontic irrigants, a clean dentin substrate is be obtained for the adhesion of restorative materials, but in order to confirm the findings of this study, further in vivo trials are needed.

scholarly journals In vitro evaluation of coronal microleakage associated with two root obturation techniques

2007 ◽  
Vol 54 (3) ◽  
pp. 184-190 ◽  
Author(s):  
Slavoljub Zivkovic ◽  
Borislava David-Burlica ◽  
Jelena Stanisic ◽  
Sonja Stojcic ◽  
Milica Medojevic-Jovanovic ◽  
...  
Keyword(s):  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Smear Layer ◽  
Human Teeth ◽  
Root Canals ◽  
Gutta Percha ◽  
Ah Plus ◽  
The Difference ◽  
Micrometer Scale

Aim: The purpose of this study was to determine the influence of the smear layer on the coronal microleakage in root canals obturated with laterally condensed cold gutta-percha or Thermafil and two root canal sealers. Materials and methods: Sixty extracted single-rooted human teeth with straight root canals were allocated to two experimental groups. The root canals were instrumented using the STEP-BACK technique, K reamers and K files and irrigated with 2.5 % NaOCl. The teeth in the first group were treated with 17% EDTA and 2.5 % NaOCl to remove the smear layer. The teeth in both groups were obturated either with laterally condensed cold guttapercha (28 teeth) or Thermafil gutta-percha with plastic cores (28 teeth) and RSA or AH-PLUS sealers. The specimens were evaluated for coronal microleakage using silver nitrate solution. The linear penetration of the dye was assessed using a binocular magnifying glass (x25), with an inserted micrometer scale. Results: The results showed low coronal microleakage in the group where the smear layer was removed in both the lateral compaction technique (RSA - 1.71mm and AHPLUS - 1.61mm) and the Thermafil groups - RSA (1.65mm) and AH-PLUS (1.66mm). In the group with the intact smear layer, greater microleakage was noticed in both groups, lateral compaction technique -RSA (3.06 mm) and AH-PLUS (2.83mm) and Thermafil technique -RSA (2.99mm) and AH-PLUS ( 2.83mm). The difference was statistically significant between the groups with and without the smear layer for both RSA (p< 0.001) and AH-PLUS sealers ( p<0.001). Conclusion: The present results suggest that the removal of the smear layer significantly improves the tightness of the coronal seal and reduces the coronal microleakage.

scholarly journals Evaluation of the Effect of MTAD on Expression of Enterococcus faecalis Virulence Factors Considering the Role of Different Obturating Materials

2019 ◽  
Author(s):  
Behnam Bolhari ◽  
Abbas Bahador ◽  
Mehrfam Khoshkhounejad ◽  
Mahsa Sobhi Afshar ◽  
Mohammad Moghaddaszadeh
Keyword(s):  
Enterococcus Faecalis ◽  
Virulence Factors ◽  
Root Canal ◽  
Statistical Power ◽  
P Value ◽  
Human Teeth ◽  
Root Canals ◽  
Gutta Percha ◽  
Post Hoc

Objectives: The aim of this study was to determine the effect of MTAD on the expression of virulence factors of Enterococcus faecalis (E.faecalis) considering the role of Gutta-percha/AH26 or Resilon/RealSeal SE as root canal obturating materials. Materials and Methods: One-hundred and forty-four single-rooted human teeth were instrumented to a standardized apical size. Root canals were infected by E.faecalis (ATCC 29212). Ninety teeth were irrigated with MTAD and randomly divided into three groups. In two groups, root canals were obturated by either Gutta-percha/AH26 or Resilon/RealSeal SE. Root canals were kept unobturated in the third group. The remaining 54 teeth received no final irrigation. All groups were then subdivided into three timepoint subgroups in which dentin powder was obtained from each sample to determine the expression of specific virulence factors of E.faecalis (efa, esp, gel, fsr) using real-time reverse transcription polymerase chain reaction (RT-PCR). Statistical analysis was performed by one-way analysis of variance (ANOVA) and Tukey’s post-hoc test. The statistical power was set at P-value ≤0.05. Results: MTAD was effective against the expression of most of the tested virulence factors, and Gutta-percha/AH26 increased the antibacterial efficacy of MTAD. Conclusions: MTAD could inhibit the expression of some known virulence factors of E.faecalis at the majority of tested timepoints. This may partly explain some of the mechanisms of antimicrobial efficacy of MTAD against this resistant microorganism which is known as one of the main causes of failure of root canal treatment.

Apical Leakage of Resilon™ Obturation Material

2006 ◽  
Vol 7 (4) ◽  
pp. 45-52 ◽  
Author(s):  
Emre Bodrumlu ◽  
Umut Tunga
Keyword(s):  
Control Groups ◽  
Human Teeth ◽  
Root Canals ◽  
Dye Penetration ◽  
Gutta Percha ◽  
Sealing Ability ◽  
Ah Plus ◽  
Apical Leakage

Abstract Aim The aim of this study was to assess the apical sealing ability of Resilon™ obturation material. Methods and Materials Forty-two single rooted extracted human teeth were selected and randomly divided into three groups. They were obturated using lateral condensation with gutta-percha and AH 26/AH plus and Resilon™; also, 12 root canals were used as control groups. The apical leakage was measured using the dye penetration methodology. Results The teeth filled with gutta-percha and AH 26 displayed the most apical leakage. The least apical leakage was shown with Resilon™ Discussion The differences in leakage among the groups, gutta-percha with AH 26 (2.4 mm, SD:1.87), gutta-percha with AH plus (2.1 mm, SD: 1.69), and Resilon™ (1.7 mm, SD:1.32), were statistically significant (p< 0.001). Conclusion Based on the data of this study, all groups produced a satisfactory seal. However, Resilon™ and Epiphany™ sealer showed the least apical leakage. Citation Bodrumlu E, Tunga U. Apical Leakage of Resilon™ Obturation Material. J Contemp Dent Pract 2006 September;(7)4:045-052.

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