scholarly journals Effect of Super-Bond C&B and self-adhesive dual-cured resin cement on the fracture resistance of roots with vertical root fracture

2019 ◽  
Vol 13 (2) ◽  
pp. 153-157
Author(s):  
Ezgi Doğanay Yıldız ◽  
Hakan Arslan ◽  
Nilay Ayaz ◽  
Mustafa Gündoğdu ◽  
Alper Özdoğan ◽  
...  
Keyword(s):  
Root Canal ◽  
Fracture Resistance ◽  
Resin Cement ◽  
Control Group ◽  
Human Teeth ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
Root Canals ◽  
Chi Squared ◽  
Post Hoc

Background. Vertical root fracture might occur during root canal preparation, obturation, post procedures or endodontic treatment. Methods. Fifty-four single-rooted human teeth were decoronated to obtain a standardized length. The root canals were enlarged up to #50 and obturated with gutta-percha and root canal sealer. Eighteen teeth were used as a control group, and vertical root fracture was induced in the remaining teeth. The samples were randomly divided into three groups, as follows: control group (without vertical root fracture), Super-Bond C&B group (fragments were attached with Super-Bond C&B), and self-adhesive dual-cured resin cement group (fragments were attached with self-adhesive dual-cured resin cement). Each specimen was subjected to a fracture resistance test, and data were statistically analyzed using chi-squared test, one-way ANOVA and post hoc Tukey tests (P=0.05). Results. The fracture resistance values of the control and Super-Bond C&B groups were higher than those of the self-adhesive dual-cured resin cement group (P<0.05). However, there were no significant differences between the control and Super-Bond C&B groups (P>0.05). Conclusion. Within the limitations of the present study, Super-Bond C&B was beneficial in obtaining higher fracture resistance in endodontically treated roots with vertical root fracture.

scholarly journals Fracture Resistance of Retreated Roots Using Different Retreatment Systems

2011 ◽  
Vol 05 (04) ◽  
pp. 387-379 ◽  
Author(s):  
Kursat Er ◽  
Tamer Tasdemir ◽  
Seyda Herguner Siso ◽  
Davut Celik ◽  
Sabri Cora
Keyword(s):  
Fracture Resistance ◽  
In Vitro Study ◽  
Control Group ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
Root Canals ◽  
Gutta Percha ◽  
Ah Plus ◽  
Post Hoc

ABSTRACTObjectives: This study was designed to evaluate the fracture resistance of retreated roots using different rotary retreatment systems. Methods: Forty eight freshly extracted human canine teeth with single straight root canals were instrumented sequentially increasing from size 30 to a size 55 using K-files whit a stepback technique. The teeth were randomly divided into three experimental and one control groups of 12 specimens each. The root canals were filled using cold lateral compaction of gutta-percha and AH Plus (Dentsply Detrey, Konstanz, Germany) sealer in experimental groups. Removal of gutta-percha was performed with the following devices and techniques: ProTaper Universal (Dentsply Maillefer, Ballaigues, Switzerland), R-Endo (Micro-Mega, Besançon, France), and Mtwo (Sweden & Martina, Padova, Italy) rotary retreatment systems. Control group specimens were only instrumented, not filled or retreated. The specimens were then mounted in copper rings, were filled with a self-curing polymethylmethacrylate resin, and the force required to cause vertical root fracture was measured using a universal testing device. The force of fracture of the roots was recorded and the results in the various groups were compared. Statistical analysis was accomplished by one-way ANOVA and a post hoc Tukey tests. Results: There were statistically significant differences between the control and experimental groups (P<.05). However, there were no significant differences among the experimental groups. Conclusions: Based on the results, all rotary retreatment techniques used in this in vitro study produced similar root weakness. (Eur J Dent 2011;5:387-392)

scholarly journals Influence of the incorporation of a lead foil to intraoral digital receptors on the image quality and root fracture diagnosis

2019 ◽  
Vol 48 (6) ◽  
pp. 20180369 ◽  
Author(s):  
Amanda Farias Gomes ◽  
Yuri Nejaim ◽  
Rocharles Cavalcante Fontenele ◽  
Francisco Haiter-Neto ◽  
Deborah Queiroz Freitas
Keyword(s):  
Image Quality ◽  
Control Group ◽  
Human Teeth ◽  
Radiographic Images ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
Diagnostic Values ◽  
Fracture Diagnosis ◽  
Lead Foil

Objective: To evaluate the quality of images obtained with the addition of a lead foil to intraoral digital receptors. Methods: Radiographic images of 34 single-rooted human teeth - 19 with vertical root fracture (VRF) and 15 of the control group - were obtained with and without the addition of a lead foil, using the VistaScan, Express, Digora Optime and Digora Toto systems. Images were evaluated by five observers regarding the diagnosis of VRF, using a 5-point scale. In a second moment, an observer preference analysis related to the presence of the lead foil was performed. Images of an acrylic phantom were also obtained with and without the addition of a lead foil, and the quantities of uniformity, grey value and standard deviation of grey values were obtained. Results: There were no significant differences in the VRF diagnostic values, considering the presence of the lead foil. Regarding the image quality preference, the observers preferred images acquired with the lead foil for all systems tested, but with greater values for Digora Optime (61.33%) and Express (61.33%). The presence of the lead foil did influence the image uniformity in all systems tested ( p < 0.05). Moreover, the lead foil increased the mean of grey values for Digora Optime and Express images ( p < 0.05), however it did not influence the SD in any of the digital systems ( p > 0.05). Conclusion: The addition of a lead foil to intraoral digital receptors produces a positive effect in the image quality objectively detected by means of uniformity and subjective visual preference.

scholarly journals Effect of a sonic device on bonding of fiberglass posts to root canals

2018 ◽  
Vol 17 ◽  
pp. e18924
Author(s):  
Marina de Almeida Salim ◽  
Thais Mageste Duque ◽  
Heloisa Carla Dell Santo Gusman ◽  
Carolina Oliveira de Lima ◽  
Brenda Paula Figueiredo de Almeida Gomes ◽  
...  
Keyword(s):  
Root Canal ◽  
Adhesive System ◽  
Resin Cement ◽  
Root Canal Filling ◽  
Root Canals ◽  
Gutta Percha ◽  
Ah Plus ◽  
Root Dentin ◽  
Post Hoc ◽  
Adhesive Cement

Aim: This study evaluated the effect of a sonic device on the bonding of fiberglass posts cemented with a self-etching adhesive combined with conventional cement or a self-adhesive cement to root dentin. Methods: Forty single-rooted bovine incisors were endodontically prepared using a step-back technique. Gutta-percha and AH Plus sealer were used for root canal filling, combined with a thermoplasticization technique. After 1 week, the post space was prepared and the roots were divided into four groups according to the following factors: adhesive system/resin cement (Ambar/ AllCem Core [FGM] and RelyX U200 [3M]) and application mode (manual or sonic). The posts were cemented and the roots were cut into discs and submitted to push-out bond strength (POBS) test. The failure mode was evaluated using a stereoscope at 25x magnification. The data were analyzed statistically using ANOVA and Tukey’s post-hoc test (α = 0.05). Results: The sonically activated RelyX U200 group was superior to the other groups. RelyX U200 manually applicated showed similar results to those of sonically activated Âmbar/AllCem. These three groups outperformed the Âmbar/AllCem manually applicated group. Adhesive failure between dentin and resin cement was the most predominant pattern. Conclusion: Sonic application of self-etching adhesive and self-adhesive cement improved the POBS of fiber posts to the root canal.

scholarly journals Efficacy of finisher files in the removal of calcium hydroxide paste from the root canal system – preliminary results

2021 ◽  
Vol 90 (2) ◽  
pp. e499
Author(s):  
Agata Koprowicz ◽  
Piotr Koprowicz
Keyword(s):  
Calcium Hydroxide ◽  
Root Canal ◽  
Control Group ◽  
Sodium Hypochlorite Solution ◽  
Human Teeth ◽  
Filling Materials ◽  
Number Of Factors ◽  
Root Canal System ◽  
Post Hoc ◽  
Better Than

Introduction. Successful endodontic treatment is affected by a number of factors associated with the disinfection and filling of the root canal. The chemical-mechanical root canal preparation consists in a thorough removal of any content from the pulp space, including inflamed pulp, bacteria, as well as canal filling materials. Aim. The aim of the study was to analyse the efficacy of the XP-endo Finisher and the Brush-Finisher on the removal of a calcium hydroxide dressing. Material and Methods. The study was conducted using extracted single-rooted human teeth prepared according to sample standardization. Calcium hydroxide with iodoform was inserted into the canals. After two weeks, canal cleaning was performed with the use of 2% sodium hypochlorite solution and both finisher files. A conventional endodontic needle and syringe (SNI) were used in the control group. Following rinsing activation, two projection radiographs were performed and uploaded to software developed specifically for the study. The graphic files were evaluated in terms of the remaining amount of dressing. In order to analyse whether the percentage of the canal area that remained untreated was statistically significant, the Kruskal-Wallis ANOVA test with Dunn’s post-hoc test were employed. Results. The intracanal dressing was most effectively removed in the XP-endo Finisher group (in both projections 96.32% and 91.35%), and its removal was considerably better than that in the control group (p<0.0001), although not significantly different from the Brush-Finisher group (89.68% and 81.85%). Conclusions. Supplementary irrigant activation with either the XP-endo Finisher or the Brush-Finisher improved the removal of calcium hydroxide from the root canal walls.

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.

scholarly journals Fracture resistance of teeth obturated with two different types of Mineral Trioxide Aggregate Cements

2020 ◽  
Vol 23 (3) ◽  
Author(s):  
Nidambur Vasudev Ballal ◽  
Sheetal Rao ◽  
Junsang Yoo ◽  
Kishore Ginjupalli ◽  
Manuel Toledano ◽  
...  
Keyword(s):  
Root Canal ◽  
Fracture Resistance ◽  
Testing Machine ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Root Canals ◽  
Group I ◽  
Significant Difference ◽  
Group Ii

Objective: Endodontically obturated teeth have lower fracture resistance depending on the obturating material and technique. The purpose of this study was therefore to evaluate the influence of ProRoot MTA (Dentsply Sirona, Tulsa Division) and OrthoMTA III (BioMTA, Daejeon, Korea) as an obturating material on the fracture resistance of endodontically treated teeth. Material and Methods: Thirty extracted human maxillary central incisors were decoronated and instrumented using Protaper instruments (size F5). Irrigation was performed with 2.5% sodium hypochlorite between each instrument change followed by 7% maleic acid for one minute. Finally, canals were flushed with 5 ml of PBS solution for one minute. Samples were then divided into three groups. Group I- positive control (no root canal filling); Group II- obturation with ProRoot MTA; Group III- obturation with OrthoMTA III. Ten teeth were randomly selected as a negative control in which no treatment was performed. All the specimens were then subjected to fracture strength testing using universal testing machine. For evaluation of biomineralization, six maxillary central incisors were divided into two groups. Group I obturated with ProRoot MTA and group II obturated with OrthoMTA III. These samples were subjected to SEM analysis. Results: Positive control group demonstrated the least fracture resistance, while OrthoMTA III group showed the highest fracture resistance. There was no significant difference between negative control group and ProRoot MTA groups (p=0.821). OrthoMTA III group showed better tubular biomineralization when compared to ProRoot MTA. Conclusions: Root canals obturated with OrthoMTA III had better fracture resistance and increased tubular biomineralization compared to ProRoot MTA. Since root canals obturated with OrthoMTA III had better fracture resistance, it can be used as a promising obturating material.KeywordsBiomineralization; Fracture Resistance; OrthoMTA III; ProRoot MTA; Root Canal; Tubular.

scholarly journals Effect of calcium hydroxide intracanal dressing on the bond strength of a resin-based endodontic sealer

2008 ◽  
Vol 19 (3) ◽  
pp. 224-227 ◽  
Author(s):  
João Vicente Baroni Barbizam ◽  
Martin Trope ◽  
Érica C.N. Teixeira ◽  
Mário Tanomaru-Filho ◽  
Fabrício B. Teixeira
Keyword(s):  
Bond Strength ◽  
Calcium Hydroxide ◽  
Root Canal ◽  
In Vitro Study ◽  
Saline Control ◽  
Control Group ◽  
Root Canal Filling ◽  
Human Teeth ◽  
Root Canals

The aim of this in vitro study was to evaluate the bond strength of Epiphany™ resin-based sealer to dentin walls after placement of calcium hydroxide [Ca(OH)2] dressings. Fifteen extracted single-rooted human teeth were instrumented using 2.5% NaOCl + EDTA as irrigants. The teeth were randomly assigned to 3 groups (n=5), according to the intracanal dressing: G1= Ca(OH)2 + saline; G2= Ca(OH)2 + 2% chlorhexidine gluconate (CHX) gel; and G3= saline (control). After 10 days of storage in 100% humidity at 37ºC, the dressings were removed and the root canals were filled with Epiphany™ sealer. After additional 48 h of storage, the specimens were sectioned transversally into 2-mm-thick discs. Push-out tests were performed (1 mm/min, Instron 4411) and the maximum loads at failure were recorded in MPa. One-way ANOVA and Newman-Keuls tests showed a statistically significant decrease in bond strength when a Ca(OH)2 dressing was used before root canal filling with Epiphany™ (G1= 10.18 ± 1.99 and G2= 9.98 ± 2.97) compared to the control group (13.82 ± 3.9) (p< 0.05). It may be concluded that the use of Ca(OH)2 as an intracanal dressing material affected the adhesion of Epiphany™ to the root canal walls, but even though the values were within the acceptable range found in the literature.

scholarly journals Evaluation of the Push-out Bond Strength of ProRoot MTA and Bio-dentine After Removal of Calcium Hydroxide and Triple Antibiotic Paste

2018 ◽  
Vol 8 (2) ◽  
pp. 50-55
Author(s):  
Fatih Tulumbacı ◽  
Merve Erkmen Almaz ◽  
Volkan Arıkan ◽  
Merve Safa Mutluay
Keyword(s):  
Bond Strength ◽  
Calcium Hydroxide ◽  
Control Group ◽  
Human Teeth ◽  
Root Canals ◽  
Triple Antibiotic Paste ◽  
Group 2 ◽  
Prior Application ◽  
Post Hoc ◽  
Push Out

Aim: To evaluate the effect of calcium hydroxide (CH) and triple antibiotic paste (TAP), on the push-out bond strength of ProRoot MTA and Biodentine. Methodology: Root canals of 120 human teeth were instrumented using rotary files. To obtain a standard diameter of 1.5 mm,the roots were instrumented to a #6 Peeso reamer. The reamers were passed 1 mm beyond apex to simulate open apices. The roots were randomly assigned into following groups: Group 1: CH; Group 2: TAP; Group 3: no medicament (control). The medicaments were removed after 3 weeks. Thereafter, the specimens were divided into two subgroups according to the calcium silicate-based cement applied (n = 20): (i) ProRoot MTA (Dentsply Tulsa Dental, USA) and (ii) Biodentine (Septodont, France). Push-out test was performed, and the data were analysed statistically using one-way ANOVA and Tukey’s post hoc test. Results: In both MTA and Biodentine groups, pairwise comparisons between medicaments showed similar values to the control group (P > 0.05). Overall, there was a predominance of cohesive failures between root dentin and cements. Conclusion: Biodentine and ProRoot MTA showed similar bond strength values, and prior application of the TAP and CH did not affect the bond strength significantly.

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