scholarly journals Effect of Sodium Hypochlorite on Push-out Bond Strength of Four Calcium Silicate-based Endodontic Materials when used for repairing Perforations on Human Dentin: An in vitro Evaluation

2017 ◽  
Vol 18 (4) ◽  
pp. 289-294 ◽  
Author(s):  
Sara A Alsubait
Keyword(s):  
Bond Strength ◽  
Sodium Hypochlorite ◽  
Calcium Silicate ◽  
Statistical Significance ◽  
Control Group ◽  
Scanning Electron Microscopy Data ◽  
Repair Material ◽  
Human Dentin ◽  
Push Out

ABSTRACT Aim This study aimed to evaluate the push-out bond strength of NeoMTA Plus (NMTA), EndoSequence root repair material fast set putty (ERRMF), biodentine (BD), and ProRoot white mineral trioxide aggregate (PMTA) when used as perforation repair materials after exposure to 2.5% sodium hypochlorite (NaOCl) during the early setting phase. Materials and methods Horizontal midroot sections were prepared from single-rooted human teeth. Sections (n = 144) were randomly divided into four groups: PMTA, BD, NMTA, and ERRMF. Materials were condensed and allowed to set for 10 minutes. The groups were further divided into two subgroups. The NaOCl group included specimens that were immersed in 2.5% NaOCl for 30 minutes, and the control group included specimens on which a wet cotton pellet was placed over the test material. After 48 hours, the highest force applied to the materials at the time of dislodgement was recorded. Slices were then examined under a digital microscope to evaluate the nature of the bond failure. The surfaces of two specimens from each subgroup were observed by scanning electron microscopy. Data were statistically analyzed with two-way and one-way analysis of variances, independent t-tests, and chi-square tests. The statistical significance was set at 0.05. Results In NaOCl-treated groups, PMTA showed a significantly higher push-out bond strength than the other three materials (p = 0.00). In the control groups, the bond strength of BD was significantly higher than that of PMTA, ERRMF, and NMTA (p < 0.05). Compared with the control group, NaOCl treatment significantly increased the push-out bond strength of PMTA (p = 0.00) and ERRMF (p = 0.00) and significantly reduced the bond strength of BD (p = 0.00) and NMTA (p = 0.03). None of the specimens showed an adhesive type of failure. The majority of the samples exhibited a cohesive failure type. Morphological observations revealed that the surfaces exhibited cubic crystals. In ERRMF, the crystals were few in number. Sodium hypochlorite enhanced the crystallization of NMTA. Conclusion The push-out bond strengths of PMTA and ERRMF were significantly increased after exposure to 2.5% NaOCl in the early setting phase, and those of BD and NMTA were significantly decreased. Clinical Significance The results of the present study suggest that early exposure of NaOCl increase the push-out bond strength of PMTA and ERRMF. PMTA had the highest push-out values. Therefore, it would be a potentially useful perforation repair material for single visit endodontic treatment. How to cite this article Alsubait SA. Effect of Sodium Hypochlorite on Push-out Bond Strength of Four Calcium Silicate-based Endodontic Materials when used for repairing Perforations on Human Dentin: An in vitro Evaluation. J Contemp Dent Pract 2017;18(4):289-294.

scholarly journals Efficacy of Fiber Post Bonding To Root Dentin after Different Obturation Techniques and Cementation Timings: In Vitro Study

2018 ◽  
Vol 6 (9) ◽  
pp. 1707-1711
Author(s):  
Rami M. Atia ◽  
Nada Omar ◽  
Haidy Nabil ◽  
Yousra Aly
Keyword(s):  
Bond Strength ◽  
Statistical Significance ◽  
Testing Machine ◽  
In Vitro Study ◽  
Resin Cement ◽  
Vitro Study ◽  
Endodontically Treated Teeth ◽  
Root Dentin ◽  
Push Out

OBJECTIVE: The aim of this in vitro study was to assess the effect of obturation technique and cementation timings on the bonding of fibre-reinforced posts to the root canal walls. METHODS: Twenty extracted teeth were randomly allocated to two groups according to the obturation technique and cementation timing. Central incisors with single canals were used after being decoronated. Every extracted tooth of the {vertical compaction group} (VC) group (n = 10) had been obturated using the {E & Q plus obturation system} with posts cemented in the same day; The other (CO) conventional group (n = 10) teeth were obturated using the conventional lateral compaction technique and posts cemented after one week. “SF“ Fiber posts were used after bonding and cementation using Rely X ARC resin cement with all the endodontically treated teeth. The push-out test was performed in a universal testing machine. Data were analysed by 2 way analysis of variance with Statistical significance was set to 0.05. RESULTS: Heat softened gutta percha group showed more push out the bond strength of the bonded posts than the conventional obturation group (p < 0.05). In the middle region, there was no statistical significance between the two groups while there was significance in the coronal and apical thirds. CONCLUSION: The vertical compaction technique and early cementation improved the bond strength of the resin posts in comparison to the conventional obturation technique with late cementation.

scholarly journals Effect of exposure to etidronic acid on the bond strength of calcium silicate-based cements after 1 and 21 days: an in vitro study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Elena Rebolloso de Barrio ◽  
Juan José Pérez-Higueras ◽  
Ernesto García-Barbero ◽  
Lucía Gancedo-Caravia
Keyword(s):  
Bond Strength ◽  
Root Canal ◽  
Calcium Silicate ◽  
Ethylenediaminetetraacetic Acid ◽  
Setting Time ◽  
Etidronic Acid ◽  
Human Teeth ◽  
Root Canal Irrigants ◽  
Push Out

Abstract Background After reparation of root perforations with calcium silicate-based cements (CSBC), the surface of the material is expected to be exposed to root canal irrigants (RCI) while resuming the root canal treatment. Methods The aim of this study was to compare the effect of exposure to a mixture of sodium hypochlorite (NaOCl) and etidronic acid (HEBP) or other irrigants on the Push Out Bond Strength (POBS) of CSBC after two different setting times. 240 root slices 1 mm thick were obtained from single-rooted human teeth. A 1.4 mm diameter perforation was performed on each slice and filled with Biodentine (BD) or ProRoot MTA (PMTA). After 1 or 21 days they were exposed to 17% ethylenediaminetetraacetic acid, 5.25% NaOCl, a mixture of 5.25% NaOCl and 9% HEBP (NaOCl + HEBP) or saline (n = 15) and submitted to a push-out test. POBS results were analysed with ANOVA and Tukey tests. Results BD showed higher POBS than PMTA after 1 day (p < .05). After 21 days no differences were found between materials. After 1 day exposure to NaOCl + HEBP resulted in higher POBS, compared to the other irrigants (p < .05). Conclusion POBS results are influenced by the cement, the setting time and the exposure to irrigants.

scholarly journals An In-vitro Assessment of Effect of Interaction Between Local Anaesthetic Solution with Sodium Hypochlorite on the Sealing Ability of Root Canal Obturation

2020 ◽  
Author(s):  
Urmila Banshbahadur Chauhan ◽  
Tipturmanjunath Mangala ◽  
Rushikesh Mahaparale ◽  
Adish Saraf ◽  
Sneha Mali ◽  
...  
Keyword(s):  
Bond Strength ◽  
Sodium Hypochlorite ◽  
Root Canal ◽  
Group Iv ◽  
Group Iii ◽  
Anaesthetic Solution ◽  
Sealing Ability ◽  
Local Anaesthetic Solution ◽  
Push Out

Introduction: Endodontic treatment failures are caused by persistent or secondary infection due to inefficient cleaning or re-infection of the obturated root canal system because of coronal or apical leakage. Intrapulpal Injection (IPI) technique is the most commonly employed supplemental anaesthetic procedure and NaOCl is considered as gold standard irrigating solution. Therefore, this study was designed to explore the action of precipitate form by interaction between LA and Sodium Hypochlorite (NaOCL) on sealing of root canal obturating material. Aim: To evaluate the effect of precipitate formed by interaction of local anaesthetic solution and NaOCl on the sealing ability of root canal obturation, using a push-out bond strength test. Materials and Methods: This was an in-vitro study from October 2019 to January 2020. In this study, forty single rooted premolars were selected and were randomly distributed equally into 4 groups with 10 specimens in each group, based on the test solutions employed. All the teeth were decoronated and the root length was standardised. Group I - irrigated with saline only, Group II- treated with 2% lidocaine hydrochloride with adrenaline 1:100,000 (2% LA) followed by 3% NaOCl, Group III - 2% LA followed by saline and 3% NaOCl, Group IV- 3% NaOCl followed by saline. All root canals were than instrumented using ProTaper Universal rotary system upto F3 and obturation was done using AH plus sealer and GuttaPercha. Sealing ability was evaluated using a micro push-out bond strength, with the help of a universal testing machine and data were analysed statistically. Results: One-way analysis of variance (ANOVA) showed that there is highly significant difference among the various groups (p <0.0001). Within the experimental groups, Group II showed minimum mean push out bond strength (16.39±2.40) as compared to Group III (21.83±1.25) and Group IV (22.50±2.12). Conclusion: Interaction of LA with NaOCl forms precipitate which blocks the dentinal tubules and reduces the mean push out bond strength. It is recommended to irrigate thoroughly with saline after intrapulpal injection (2%LA) before irrigating with NaOCl.

scholarly journals Evaluation of the effect of chlorhexidine and sodium hypochlorite in adhesive cementation of fiber posts - in vitro study

2019 ◽  
Vol 48 ◽  
Author(s):  
Tainara CONTE ◽  
Guilherme Schmitt de ANDRADE ◽  
Ana Paula GADONSKI ◽  
Daniella Cristo SANTIN ◽  
Fabiana Scarparo NAUFEL
Keyword(s):  
Bond Strength ◽  
Sodium Hypochlorite ◽  
Fracture Mode ◽  
Hydrolytic Degradation ◽  
In Vitro Study ◽  
Significant Loss ◽  
Resin Cement ◽  
Control Group ◽  
Hybrid Layer

Abstract Introduction The attachment of fiberglass posts is achieved through an adhesive process. Failures in adhesion may occur due to the hydrolytic degradation of the adhesives, or to the degradation of the collagen fibres of the hybrid layer by intrinsic enzymes. Objective To evaluate the effect of chlorhexidine and sodium hypochlorite treatment on bond strength to dentin. Material and method Thirty bovine roots were randomly distributed into 3 groups (n=10): a) Control, b) 2% Chlorhexidine, and c) 5% Sodium Hypochlorite. Next, RelyX® ARC resin cement was used to cement the post. Each specimen resulted in samples from the three root thirds that were submitted to the pushout test (MPa) at 24 hours and 12 months. Bond strength values were analysed using the Kolmogorov-Smirnov, 3-way ANOVA and Tukey tests. The fracture mode of the pin was also analysed using stereomicroscopy. Result There were no significant differences between treatments at the immediate time (p=0.0644) or in the interaction of factors (p=0.1935). After one year, the experimental groups showed no significant differences in bond strength in relation to the control group, with the exception of the cervical third of the chlorohexidine group in which there was a significant loss of adhesion. As for the fracture mode, there was a predominance of the mixed type in all groups and thirds. Conclusion The use of chlorhexidine or hypochlorite provides neither benefits nor losses in the adhesive bond strength of fiberglass posts. However, there is an influence of the root thirds, with the worst bond strength in the apical third.

scholarly journals Evaluation of the effect of calcium hydroxide and endodontic irrigants on the push-out bond strength of fiber post - an in vitro study

2018 ◽  
Vol 91 (4) ◽  
pp. 458-461
Author(s):  
Anjum Chaudhary ◽  
Mohit Kumar ◽  
Sonali Taneja
Keyword(s):  
Bond Strength ◽  
Calcium Hydroxide ◽  
Testing Machine ◽  
In Vitro Study ◽  
Cervical Region ◽  
Control Group ◽  
P Value ◽  
Fiber Post ◽  
Push Out

Background. In recent years, fibre-reinforced composite posts have been proposed for the restoration of root filled teeth as an alternative to pre-fabricated posts or metal dowels.Aims and objectives. The aim of the study was to analyze the effect of endodontic irrigants used for removal of calcium hydroxide on the push-out bond strength of fiber posts to root canal dentin.Methods. Forty human permanent single-rooted mandibular premolars with relatively straight roots were taken and access cavities were prepared and biomechanical preparation done using Rotar Y protaper file till size F2. The samples were divided into Experimental group and Control group. In Experimental groups Intracanal dressing of calcium hydroxide was removed by 2.5% NaOCl and 17% EDTA (Group1), MTAD (Group II) and Qmix (Group III). Control group did not receive Intracanal calcium hydroxide dressing. Canals were obturated using size F2 protaper gutta-percha points and AH plus sealer. After storage for 24 hours, post space was prepared. Forty Tenax fiber post (Coltene) were cemented with Rely X U200 resin. The roots were then transversally sectioned into 3 slices of 1mm thickness corresponding to cervical, middle and apical third. The slices obtained were subjected to micro-push-out bond strength test using a universal testing machine. The data obtained was subjected to statistical analysis using One-Way ANOVA test. P value of .05 was considered as statistically significant level.Results. The mean push-out bond strength values for controls, NaOCl/EDTA, MTAD and QMIX group at cervical third were 10.17, 15.84, 20.39 and 20.98 whereas at apical third 4.78, 8.85, 11.66 and 12.10.Conclusion. Qmix showed higher push-out bond strength values followed by MTAD and NaOCl/EDTA. All the groups showed lowest push-out bond strength values in the apical third followed by middle and the maximum in the cervical region.

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