Sealing ability of MTA and amalgam in different root-end preparations and resection bevel angles: an in vitro evaluation using marginal dye leakage

Post, Letícia Kirst; Lima, Fábio Garcia; Xavier, Cristina Braga; Demarco, Flávio Fernando; Gerhardt-Oliveira, Marília

doi:10.1590/s0103-64402010000500007

Cited by 32 publications

(30 citation statements)

References 16 publications

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“…The purpose of endodontic therapy is to clean and disinfect the root canal system with subsequent filling to provide an impervious apical seal [1] . In some cases, if conventional endodontic therapy fails and/or retreatment is not feasible, apicoectomy is performed and a root-end filling is placed to seal the apex [2] . On the other hand, the quality of coronal restoration has been reported to be more important than the quality of obturation itself in maintaining a healthy periapex [3] .…”

Section: Introductionmentioning

confidence: 99%

Push-Out Bond Strength and Surface Microhardness of Calcium Silicate-Based Biomaterials: An in vitro Study

Majeed

AlShwaimi²

2016

Med Princ Pract

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of 1 mm/min. Samples were analyzed under a light microscope to determine the nature of bond failure. Ten samples (2 mm thick) were prepared for all the materials, and Vickers microhardness was determined using a digital hardness tester. Data were analyzed using one-way analysis of variance and Tukey-Kramer multiple comparison tests at a significance level of p < 0.05. Results: Biodentine (42.02; 39.35 MPa) and ProRoot MTA (21.86; 34.13 MPa) showed significantly higher bond strengths than BioAggregate (6.63; 10.09 MPa) in coronal and apical root dentin, respectively ( p < 0.05). Biodentine also differed significantly from ProRoot MTA in coronal dentin. Bond failure was predominantly adhesive in Biodentine and ProRoot MTA, while BioAggregate showed predominantly mixed failure. ProRoot MTA (158.52 HV) showed significantly higher microhardness and BioAggregate (68.79 HV) showed the lowest hardness. Conclusion: Biodentine and ProRoot MTA showed higher bond strength and microhardness compared to BioAggregate. AbstractObjective: This was an in vitro evaluation of push-out bond strength and surface microhardness of calcium silicatebased biomaterials in coronal and apical root dentin. Materials and Methods: Ninety sections (2 mm thick) of coronal and apical root dentin were obtained from roots of 60 extracted teeth; the canals were enlarged to a standardized cavity diameter of 1.3 mm. Sections were randomly divided into 6 groups ( n = 15 per group), and cavities were filled with Biodentine TM , BioAggregate, or ProRoot mineral trioxide aggregate (MTA), according to the manufacturers' instructions. Push-out bond strength values were measured using a universal testing machine under a compressive load at a speed Significance of the StudyIn this study, the push-out bond strength and microhardness of 3 materials, ProRoot MTA, Biodentine, and BioAggregate, were compared. Biodentine and ProRoot MTA had higher bond strength and microhardness values than BioAggregate, and hence could be the materials of choice for root repair procedures and retrograde fillings.

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Section: Introductionmentioning

confidence: 99%

Push-Out Bond Strength and Surface Microhardness of Calcium Silicate-Based Biomaterials: An in vitro Study

Majeed

AlShwaimi²

2016

Med Princ Pract

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“…1 Root-end filling materials should prevent leakage, promote antimicrobial activity, and provide an effective environment for healing of the apical tissues. 2,3 Mineral Trioxide Aggregate (MTA) as a root-end filling material has proved to be the most effective material in preventing leakage 3 and stimulating tissue repair. 4 …”

Section: Introductionmentioning

confidence: 99%

Influence of 2% chlorhexidine on pH, calcium release and setting time of a resinous MTA-based root-end filling material

et al. 2015

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The addition of chlorhexidine (CHX) to a resinous experimental Mineral Trioxide Aggregate (E-MTA) based root-end filling material is an alternative to boost its antimicrobial activity. However, the influence of chlorhexidine on the properties of this material is unclear. The aim of this study was to evaluate the influence of 2% chlorhexidine on the pH, calcium ion release and setting time of a Bisphenol A Ethoxylate Dimethacrylate/Mineral Trioxide Aggregate (Bis-EMA/MTA) based dual-cure experimental root-end filling material (E-MTA), in comparison with E-MTA without the addition of CHX and with conventional white MTA (W-MTA). The materials were placed in polyethylene tubes, and immersed in deionized water to determine pH (digital pH meter) and calcium ion release (atomic absorption spectrometry technique). The setting time of each material was analyzed using Gilmore needles. The data were statistically analyzed at a significance level of 5%. E-MTA + CHX showed an alkaline pH in the 3 h period of evaluation, the alkalinity of which decreased but remained as such for 15 days. The pH of E-MTA + CHX was higher than the other two materials after 7 days, and lower after 30 days (p < 0.05). All of the materials were found to release calcium ions throughout the 30 days of the study. The addition of CHX increased the calcium ion release of E-MTA to levels statistically similar to W-MTA. E-MTA showed shorter initial and final setting time, compared with W-MTA (p < 0.05). The addition of 2% CHX to MTA prevented setting of the material. The addition of CHX to E-MTA increased its pH and calcium ion release. However, it also prevented setting of the material.

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“…[10] Therefore, a shorter setting time and an adequate adaptation in retrofilling cavity are desirable. [1,22] In the present study, 5% CaCl 2 + 2% CHX (G3) group had the shortest final setting time (23 min for GMTA), which was also significantly shorter than that of MTA with water (63 min for GMTA). Bortoluzzi et al [14] Observed initial and final setting times of 12 and 48 min for angelus white MTA, respectively, and when associated with 5% CaCl 2, initial and final setting times were of 6 and 31 min, respectively.…”

Section: Discussionmentioning

confidence: 45%

The association of chlorhexidine digluconate and calcium chloride to use as vehicle of a silicate calcium-based cement

Monteiro¹,

Kuga²,

Faria³

et al. 2015

sjod

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Objective: The purpose of this study was to evaluate the influence of the addition of 2% chlorhexidine digluconate (CHX) associated with 5% calcium chloride (CaCl 2 ) on antimicrobial activity, setting time, pH and calcium release of gray mineral trioxide aggregate (GMTA). Materials and Methods: GMTA powder was mixed with water, 2% CHX alone or 2% CHX combined with 5% CaCl 2 . Antimicrobial activity was determined against Enterococcus faecalis (ATCC 29212) strains by agar diffusion test. Data obtained were submitted to kruskal wallis tests. Analysis of the setting time was evaluated by American society for testing and materials C266-03 requirements. The pH and calcium release analysis were evaluated, in 24 h, 7, 14 and 28 days using pH meter equipment and atomic absorption spectrophotometer, respectively. Data obtained were analyzed by ANOVA, in 5% significance level. Results: Significant differences were seen (P < 0.01) among the zones of bacterial growth inhibition produced by 5% CaCl 2 + 2% CHX combination against E. faecalis when compared with water (P < 0.05). Regarding the setting time, that combination had the shortest setting time (P < 0.05). All associations were alkaline and released calcium. No statistical difference was observed between the experimental groups at the different periods of analysis (P > 0.05). Conclusion: Combination of 5% CaCl 2 + 2% CHX reduced the setting time and enhanced the antimicrobial activity of GMTA without changing the pH and calcium release.

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Sealing ability of MTA and amalgam in different root-end preparations and resection bevel angles: an in vitro evaluation using marginal dye leakage

Cited by 32 publications

References 16 publications

Push-Out Bond Strength and Surface Microhardness of Calcium Silicate-Based Biomaterials: An in vitro Study

Push-Out Bond Strength and Surface Microhardness of Calcium Silicate-Based Biomaterials: An in vitro Study

Influence of 2% chlorhexidine on pH, calcium release and setting time of a resinous MTA-based root-end filling material

The association of chlorhexidine digluconate and calcium chloride to use as vehicle of a silicate calcium-based cement

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