Effect of alkaline ph on sealing ability of white mineral trioxide aggregate

Lotfi, Mehrdad; Vosoughhosseini, Sepideh; Saghiri, Mohammad Ali; Zand, Vahid; Yavari, Hamid Reza; Kimyai, Soodabeh; Mehdipour, Masoumeh; Ranjkesh, Bahram; Mirfazaelian, Hadi; Milani, Amin Salem; Doosti, Sirvan

doi:10.4317/medoral.17158

Cited by 12 publications

(6 citation statements)

References 16 publications

(20 reference statements)

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“…MTA has an excellent sealing ability [ 9 , 10 ]. Studies have evaluated the effect of different parameters on the sealing ability of MTA [ 87 – 89 ]. One of the parameters which affect sealing ability is the mixing method.…”

Section: Discussionmentioning

confidence: 99%

Effect of Different Mixing Methods on Physicochemical Properties of Mineral Trioxide Aggregate: A Systematic Review

Milani

Radmand

Nobar

et al. 2023

International Journal of Dentistry

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Background. Mineral trioxide aggregate (MTA) is a commonly used endodontic biomaterial. The physicochemical properties of MTA have a crucial role in designating clinical outcome, and different factors can affect these properties. Various methods have been used for mixing MTA, including manual, mechanical, and ultrasonic. The aim of this systematic review was to evaluate the effect of different mixing methods on the physicochemical properties of MTA. Materials and Methods. Electronic databases including PubMed, Embase, Web of Science, and Scopus were searched up to May 2022. In order to cover gray literature, the ProQuest and Google Scholar databases were also searched to detect theses and conference proceedings. For quality assessment of the included studies, we used a modified version of the Cochrane risk of bias tool for randomized controlled trials (RCTs). Experimental studies which had assessed at least one property of MTA and compared at least two different mixing methods of MTA were included in this study. All animal studies, reviews, case reports, and case series were excluded. Results. Fourteen studies were included. The results showed that the ultrasonic mixing method significantly improved some MTA characteristics, including microhardness, flowability, solubility, setting time, and porosity. However, the mechanical mixing method improved other properties including flowability, solubility, push-out bond strength, and hydration. The manual mixing method showed inferior results compared to other mixing methods in terms of microhardness, flowability, solubility, setting time, push-out bond strength, porosity, and hydration. Different mixing methods had a similar effect on compressive strength, sealing ability, pH and calcium ion release, volume change, film thickness, and flexural strength of MTA. Conclusion. Mechanical and ultrasonic mixing methods are superior to the manual mixing method in terms of improving physicochemical properties of MTA. No report of selection bias and varieties in methodologies were limitations of evidence.

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Section: Discussionmentioning

confidence: 99%

Effect of Different Mixing Methods on Physicochemical Properties of Mineral Trioxide Aggregate: A Systematic Review

Milani

Radmand

Nobar

et al. 2023

International Journal of Dentistry

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“…Changes in the pH of host tissues due to a preexistent disease alter the mechanical properties of the CSCs [ 24 , 29 ]. The mechanical properties include surface hardness [ 30 ], tensile strength [ 31 ], sealing ability [ 32 ], and push-out bonding strength [ 23 ]. It is beneficial to investigate the changes in the mechanical properties of the CSCs after immersion in physiological solutions of different pH values [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

Influence of Acidic Environmental Conditions on Push-Out Bonding Strength of Four Calcium Silicate-Based Materials to Root Dentin

Özel

Erişen

2022

International Journal of Dentistry

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Introduction. Calcium silicate-based cements (CSCs) are frequently used in various endodontic procedures such as perforation repair, vital pulp therapy, regenerative treatments, or apexification. One of their areas of use, treatment of perforations, can be challenging in clinical practice. Selection of stable, durable, and compatible material with structural and biological alterations is a must in such situations. Aim. This study aimed to compare the dislocation resistance of various calcium-silicate-containing materials used in endodontic treatment exposed to various environmental conditions in a push-out study model. Methods. Selected ninety-six human mandibular premolars with single root canals were cut from the middle portion to obtain dentin slices of 2 mm thickness (n = 192). Then, the canal lumen was enlarged by using #4Gates-Glidden drills. Specimens for each repair material (MTA, Angelus, Endosequence RRM (ERRM), Biodentine, BioMTA) were placed in shaped lumens, wrapped in pieces of gauze, and randomly divided into four groups (n = 48) according to the storage time and media: group A: 4 days in phosphate-buffered saline (PBS), group B: 4 days in acetic acid (pH = 4.4), group C: 34 days in PBS, and group D: 4 days in acetic acid (pH = 4.4) followed by exposure to PBS for 30 days. A universal testing machine measured the dislodgement resistance followed by scanning electron microscopy imaging to evaluate the material-dentin interface. Results. ERRM showed the highest dislocation resistance in all test groups ( p < 0.05 ). The greatest bonding strength was observed (13,54 ± 5,56 MPa) after exposure to 34 days in PBS (pH = 7.2). The values for ERRM decreased in contact with acetic acid (pH = 4.4) and increased when placed in PBS ( p > 0.05 ). Conclusion. All repair materials showed a higher dislocation resistance when stored in PBS regardless of storage time. However, the improved pH of the surrounding media was not successful in reversing the deteriorating effect caused by lower pH in relation to dislocation resistance in all tested materials except for ERRM.

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“…As noted, the acids may degrade the MTA matrix, thereby affecting its sealing ability [12]. The higher leakage of the CH versus the CH–NP group may be because the CH does not set, but slowly converts to calcium carbonate [34]. The lowest leakage, shown by the combination group, could be attributed to the ability of NP to induce the deposition of hydroxyapatite, and seal the microscopic gaps between the MTA and dentin.…”

Section: Discussionmentioning

confidence: 99%

Calcium hydroxide and niobium pentoxide treatment effects before MTA placement

2022

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The aim of this study was to evaluate the effect of calcium hydroxide (CH) and niobium pentoxide (NP) pretreatment on pH, dentin microhardness and sealing of Mineral Trioxide Aggregate (MTA; Angelus). The pH of CH, NP and CH–NP (3:1) was evaluated in neutral and acidic simulated tissue fluid over 28 days. The Vickers microhardness was measured in forty 4 mm coronal root slices filled with pretreatment materials stored in medium for 1, 7, 28 days. Forty 10 mm roots were packed with pretreatment materials, irrigated after 24 h, then a 3 mm MTA plug was placed. Sealing ability was evaluated after 7 days using fluid filtration method. Statistics was performed using ANOVA and post hoc Tukey HSD tests. Addition of NP to CH maintained the alkalinity of CH, increased the microhardness of root dentin and reduced the microleakage. CH–NP can be effectively used as a pretreatment medicament in root canals requiring placement of MTA under acidic conditions.

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Effect of alkaline ph on sealing ability of white mineral trioxide aggregate

Cited by 12 publications

References 16 publications

Effect of Different Mixing Methods on Physicochemical Properties of Mineral Trioxide Aggregate: A Systematic Review

Effect of Different Mixing Methods on Physicochemical Properties of Mineral Trioxide Aggregate: A Systematic Review

Influence of Acidic Environmental Conditions on Push-Out Bonding Strength of Four Calcium Silicate-Based Materials to Root Dentin

Calcium hydroxide and niobium pentoxide treatment effects before MTA placement

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