A Novel Model for Evaluating the Flow of Endodontic Materials Using Micro–computed Tomography

Tanomaru-Filho, Mário; Torres, Fernanda Ferrari Esteves; Bosso‐Martelo, Roberta; Chávez-Andrade, Gisselle Moraima; Bonetti-Filho, Idomeo; Guerreiro-Tanomaru, Juliane Maria

doi:10.1016/j.joen.2016.12.002

Cited by 16 publications

(31 citation statements)

References 29 publications

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“…For this reason, micro-CT is considered as the gold standard for the filling analysis 21 . Based on this important characteristic to an accurate evaluation, Tanomaru-Filho et al 7 proposed a new technique for assessing flow and filling of root-end filling materials using micro-CT imaging. The authors stated that the test model proposed showed proper and reproducible results and could improve flow analysis.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, the flow of endodontic sealers may be evaluated by the ISO 6876/2012 6 standard, which recommend that the materials have a minimum of 17 mm of flow. However, the main limitation of this conventional test is its incapability to evaluate also the filling ability of the materials 7 .…”

Section: Introductionmentioning

confidence: 99%

“…A previous study 7 proposed the micro-computed tomography (micro-CT) as a reliable method to assess the flow and filling of root-end filling materials using a single test, in a 3D way. The authors used glass plates in a similar manner to the conventional ISO test, and observed an absence of correlation between the flow and filling properties.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of flow and filling of root canal sealers using different methodologies

Torres

Guerreiro-Tanomaru

Pinto

et al. 2019

Rev. odontol. UNESP

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Introduction Flow and filling ability of root canal sealers are indispensable for hermetic sealing of the root canal. Micro-computed tomography (micro-CT) can be used as a complementary methodology to evaluate such properties. Objective To evaluate the flow and filling ability of AH Plus, Endofill and Sealapex by conventional methodology and micro-CT. Material and method The flow of the sealers was analyzed according to ISO 6876/2012 and complemented by the area evaluation. Glass plates were manufactured with diameters of 1×1×2 mm and 1×1×1 mm (length, width and height), with a central cavity and four grooves in the horizontal and vertical directions. Each material was placed in the central cavity. Another glass plate and a metal weight were placed on the cement and kept for 10 minutes. The glass plate/sealer set was scanned using micro-CT. The flow was calculated by linear measurement of the material in the grooves. The central filling (mm3) was calculated in the central cavity and the lateral filling was measured up to 2 mm from the central cavity. Data were submitted to ANOVA/Tukey tests (α=0.05). Result All evaluated sealers presented flow according to ISO 6876 standards. The materials showed central cavity filling capacity higher than 80% and lateral filling greater than 75%. There was no difference in flow (mm and mm2) and in the filling ability (mm3) provided by the materials (p>0.05). Conclusion All evaluated root canal sealers showed adequate flow and filling capacity, suggesting their clinical application.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of flow and filling of root canal sealers using different methodologies

Torres

Guerreiro-Tanomaru

Pinto

et al. 2019

Rev. odontol. UNESP

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“…Numerous studies confirmed its effectiveness as a biocompatible material, inducing the formation of mineralized tissue, besides the antimicrobial activity. These excellent biological properties are attributed to its alkaline pH and calcium ion release capacity, maintaining a high pH [14][15][16]. The hydrophilic nature of the MTA particles allows its use even in the presence of moisture, once the main components are tricalcium and dicalcium silicate, tricalcium aluminate, tricalcium oxide, and radiopacifying agents, such as bismuth oxide [17].…”

Section: Introductionmentioning

confidence: 99%

Biocompatibility and biomineralization assessment of mineral trioxide aggregate flow

et al. 2018

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“…Rheological properties of TCS-based materials with a potential of use as endodontic repair materials are important clinically since they affect material manipulation, placement, and stability. So far the flowability of hydraulic cements has not been extensively studied [25][26][27]; however, flow properties of TCS-based endodontic sealers are more routinely reported in the literature [18,28,29]. This could be attributed to the lack of a standardised model for flowability tests on hydraulic cements.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of the water to powder ratio on hydraulic cement properties

et al. 2019

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Objectives. The use of rheological properties to determine the optimal water: powder ratio of tricalcium silicate-based prototype materials incorporating alternative radiopacifiers and fillers. Determination of how the proportion of water incorporated affected the physicochemical behaviour of the materials. Methods. Endodontic cements replaced with 30% radio-opacifier, and additions of calcium phosphate and micro-silica were tested. The unmodified cements were mixed with a 0.35 water: powder ratio which served as control. At this water: powder ratio, the paste had an adequate clinical consistency and furthermore these pastes have been well characterized. Assessment of material rheological properties enabled adjustment of the water: powder ratio in each material to provide comparable viscosity values to those of the controls. The flowability, phase analysis and calcium release were measured for both viscosity-matched and the standard 0.35 water: powder ratio blends. The prototype materials with the adjusted water ratio were also characterized by scanning electron microscopy, energydispersive spectroscopy and evaluated for radio-opacity. Results. The use of the 0.35 water: powder ratio is not appropriate when changing the radiopacifier and incorporating additives. Zirconium oxide did not vary the water: powder ratio but tantalum oxide and calcium tungstate resulted in an increase and decrease in water demand respectively. Using the standard 0.35 ratio when the mixture had a low water demand resulted in higher flowability values and calcium release in solution. Micro-silica and calcium phosphate altered the hydration of the materials. All materials were adequately radiopaque.

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A Novel Model for Evaluating the Flow of Endodontic Materials Using Micro–computed Tomography

Abstract: Although ZOE presented better flow determined by ISO methodology, BIO showed the best filling ability. The model of the technique proposed for evaluating flow using μCT imaging showed proper and reproducible results and could improve flow analysis.

Cited by 16 publications

References 29 publications

Evaluation of flow and filling of root canal sealers using different methodologies

Evaluation of flow and filling of root canal sealers using different methodologies

Biocompatibility and biomineralization assessment of mineral trioxide aggregate flow

Investigation of the effect of the water to powder ratio on hydraulic cement properties

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