The constitution of mineral trioxide aggregate

Camilleri, Josette; Montesin, Franco E.; Brady, Ken; Sweeney, Richard E.; Curtis, Richard; Ford, T. R. Pitt

doi:10.1016/j.dental.2004.05.010

Cited by 416 publications

(487 citation statements)

References 4 publications

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“…In addition, it is useful for the troublesome strip perforations and perforating resorptive defects 20) . MTA consists of tricalcium silicate, tricalcium aluminate, tricalcium oxide and other mineral oxides such as bismuth oxide 21) . When MTA powder is mixed with water, calcium hydroxide and calcium silicate hydrate are initially transformed into a poorly crystallized and porous solid gel 22) .…”

Section: Introductionmentioning

confidence: 99%

“…Based on these results, the authors suggested that MTA bonds chemically to dentin when it is placed adjacent to dentin, possibly via a diffusion controlled reaction. Many studies 21,22,24) demonstrated the presence of phosphorus and calcium, the main components of HA in the hard structure, between the pulp-MTA interfaces. Recent studies [23][24][25] also showed that a layer of HA forms over the material that fills the voids or surface defects after MTA placement.…”

Section: Introductionmentioning

confidence: 99%

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<i>In vitro</i> microleakage of six different dental materials as intraorifice barriers in endodontically treated teeth

et al. 2015

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The aim of this study was to compare the coronal sealing ability of six different dental materials: Three MTA-based cements and three established restorative materials by in vitro dye penetration method. For in vitro infiltration experiments, seventy extracted single-rooted human teeth were used. After crowns of teeth were reduced, root canals were prepared, and filled with gutta-percha cone. Teeth were randomly divided into 6 groups with 10 teeth per group. The orifice of each tooth was prepared to 3 mm depth and filled with the following materials: (I) ProRoot WMTA; (II) EndoCem Zr; (III) Angelus White; (IV) LuxaCore; (V) Fuji II LC; and (VI) Elite. After 5,000 cycles of thermocycling between 5°C and 55°C, dye penetration of each specimen was measured. The order of less dye infiltration of coronal filling materials was: ProRoot WMTA

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

<i>In vitro</i> microleakage of six different dental materials as intraorifice barriers in endodontically treated teeth

et al. 2015

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“…Tables 2 and 3 summarise confirmed compositions of commercially available packable hygroscopic dental cements that are likely to be included under the GMDN term for HDCs. Grey and white formulations within brands are not listed as separate entities as their compositions are generally the same, albeit, with different levels of iron and aluminium (28).…”

Section: Hygroscopic Dental Cement Classificationsmentioning

confidence: 99%

Classification and Nomanclature of Commercial Hygroscopic Dental Cements

Ha¹,

Kahler²,

Walsh³

2017

Eur Endod J

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Objective: Under the Global Medical Device Nomenclature (GMDN) system, the newly introduced term 'hygroscopic dental cement' (HDC) encompasses MTA as well as cements based on bioceramics, calcium silicate or calcium sulphate. Many HDCs have a long history of use in dentistry. There is a need for a consistent, logical and informed approach to the nomenclature of traditional and novel HDCs. Methods: Commercial manufacturers of HDC were contacted requesting information on the compositions of products. Manufacturers that were unknown to the authors, that were unable to be contacted, that wished to be excluded from this paper, or that did not send their information on compositions in due time were not included. Results:The compositions of commercial HDCs include various hybrids of calcium silicates, calcium aluminates, calcium phosphates, calcium sulphate as well as zinc sulphates. Furthermore, there are variations in the radiopacifier as well as additives that change the handling or setting processes. Conclusion:The inclusion of different additives to HDCs enables variation in handling properties such that they now exist as distinct putties and sealers as well as cements.

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“…[1][2][3] MTA is a derivative of Portland cements (PCs), both having similar composition except for the presence of bismuth oxide in MTA, which is added for radiopacity. 2,4,5 Dental applications of MTA and PCs have been largely investigated, and it has since been suggested that they fulfill many of the ideal properties of endodontic materials, such as biocompatibility, good sealing and marginal adaptation. 1,[6][7][8][9][10][11] Despite such favorable biological properties, the indication of MTA and PCs for restorative purposes requires improvements in their chemical and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of additives on the compressive strength and setting time of a Portland cement

et al. 2010

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Improvements in strength and setting time of Portland cements (PC) are needed to enhance their performance as endodontic and load bearing materials. This study sought to enhance the compressive strength and setting time of a PC by adding one of the following additives: 20% and 30% poly-methylmethacrylate (PMMA), 20% and 30% irregular and spherical amalgam alloys, and 10% CaCl 2 . The control consisted of unreinforced PC specimens. Setting time was determined using a Gillmore apparatus according to standardized methods while compressive strength was measured using a universal testing machine after 21 hours or 60 days of water storage. Data were analyzed by ANOVA, Tukey and Games-Howell tests (α = 5%). All additives significantly decreased both initial and final setting times as compared with the PC-control (p < .05). 30% PMMA and 30% irregular alloy had the lowest values of initial setting time. 30% irregular alloy also produced the lowest values of final setting time while 30% spherical alloy yielded the highest (p < .05). No differences were detected between the compressive strength values of 21 hours and 60 days. While 10% CaCl 2 , 20% and 30% PMMA produced values significantly lower than the PC-control, 30% spherical alloy significantly improved the compressive strength of the reinforced PC (p < .05). In summary, all additives significantly reduced the setting time and 30% spherical amalgam alloy yielded a significant increase in compressive strength for the tested PC, which might represent an improved composition for PCs to expand their use as endodontic and potentially load bearing materials.

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The constitution of mineral trioxide aggregate

Cited by 416 publications

References 4 publications

<i>In vitro</i> microleakage of six different dental materials as intraorifice barriers in endodontically treated teeth

<i>In vitro</i> microleakage of six different dental materials as intraorifice barriers in endodontically treated teeth

Classification and Nomanclature of Commercial Hygroscopic Dental Cements

Effect of additives on the compressive strength and setting time of a Portland cement

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