3<scp>D</scp> micro‐<scp>CT</scp> analysis of the interface voids associated with <scp>T</scp>hermafil root fillings used with <scp>AH P</scp>lus or a flowable <scp>MTA</scp> sealer

Gandolfi, Maria Giovanna; Parrilli, Annapaola; Fini, Milena; Prati, Carlo; Dummer, P. M. H.

doi:10.1111/j.1365-2591.2012.02124.x

Cited by 114 publications

(117 citation statements)

References 50 publications

(97 reference statements)

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“…Atmeh et al 18 demonstrated that Ca-Si cements facilitate the permeation of Ca and OH ions into the dentine, due to their caustic effect. It can be assumed that the improved ability to release remineralizing Ca and OH ions by Biodentine 19 is responsible for the improved formation of apatite at the interface 19,20 , and for micromechanical anchorage 21 . MTA HP showed improved push-out bond strength values compared with those of White MTA (p < 0.05).…”

Section: Discussionmentioning

confidence: 99%

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Push-out bond strength of MTA HP, a new high-plasticity calcium silicate-based cement

et al. 2016

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Push-out bond strength of MTA HP, a new high-plasticity calcium silicate-based cement Abstract: This study was designed to investigate the resistance to dislodgment provided by MTA HP, a new high-plasticity calcium silicate-based cement. Biodentine and White MTA Angelus were used as reference materials for comparison. Three discs 1 ± 0.1 mm thick were obtained from the middle third of the roots of 5 maxillary canines. Three 0.8-mm-wide holes were drilled on the axial surface of each root disc. Standardized irrigation was performed. Then the holes were dried with paper points and filled with one of the three tested cements. The filled dental slices were immersed in a phosphate-buffered saline (PBS) solution (pH 7.2) for 7 days before the push-out assessment. The Kruskal-Wallis test was applied to assess the effect of each endodontic cement on the push-out bond strength. Mann-Whitney with Bonferroni correction was used to isolate the differences. The alpha-type error was set at 0.05. All specimens had measurable push-out values and no premature failure occurred. There were significant differences among the materials (p <0.05). The Biodentine specimens had the highest push-out bond strength values (p < 0.05). MTA HP had significantly higher bond strength than White MTA (p < 0.05). MTA HP showed better push-out bond strength than its predecessor, White MTA; however, Biodentine had higher dislodgment resistance than both MTA formulations.

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Section: Discussionmentioning

confidence: 99%

“…The nucleation of apatite at the interface increases the sealing ability by reducing the interface voids 20 and improving the dislocation resistance 21 . The use of PBS promotes a condition closer to a clinical condition.…”

Section: Discussionmentioning

confidence: 99%

Push-out bond strength of MTA HP, a new high-plasticity calcium silicate-based cement

et al. 2016

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“…Voids and gaps in canal fillings reduce their ability to be sealed, thus creating conditions for bacterial and fluid microleakage from crown to apex (16,17). This study used micro-computed tomography (micro-CT) to compare the number of voids and gaps in curved root canals instrumented and filled using different techniques.…”

Section: Highlightsmentioning

confidence: 99%

3D Micro-CT Analysis of Void and Gap Formation in Curved Root Canals

Şımşek¹,

Keleş²,

Ahmetoğlu³

et al. 2017

Eur Endod J

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Objective: This study used microcomputed tomography (micro-CT) to compare the volumes of voids and gaps in curved root canals instrumented and filled using various techniques. Methods: Twenty extracted mandibular first molars with two curved mesial root canals were used. Root canals were instrumented using a self-adjusting file (SAF) or Revo-S file system. For standardization, mesiobuccal canals were instrumented with SAF and mesiolingual canals were instrumented with Revo-S in each root. The canals were divided into four experimental groups (n=10 in each). The canals were then filled via cold lateral compaction (CLC) or a thermoplasticized injectable technique (TT) using gutta-percha and AH Plus root canal sealer. The roots were scanned with a micro-CT, and the volumes of the voids and gaps were calculated using three-dimensional (3D) micro-CT images. Data were analyzed using unpaired t-and Kruskal-Wallis tests. A value of P < 0.05 was considered significant. Results: None of the tested techniques provided void-or gap-free fillings. Nevertheless, the SAF showed more gap formation than the Revo-S, and TT showed higher gap formation in all experimental groups. These differences, however, were not statistically significant (p>0.05). Conclusion:The SAF and Revo-S rotary file systems yielded comparable results. No statistically significant difference was found between the results of the various instrumentation and filling techniques.

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“…After reconstruction, images were analyzed by using CTAn software (V1.11.8; SkyScan, Belgium). To obtain the total volume of material in mm 3 , the area of interest the region of interest (ROI) was defined by previous tests and a calibrated operator made all the analyzes of each sample, excluding the dentin. The binary value (threshold) was adjusted to assure the analysis of the material and the total volume of the material in mm 3 from quantitative analysis was obtained.…”

Section: Filling Ability Analysismentioning

confidence: 99%

“…Microcomputed tomography (micro-CT) is a non-destructive tool used for different studies in Endodontics as analysis of root canal filling 1 , filling ability of the reparative materials 2 and the evaluation of interface material/dentin associated with different root canal filling techniques and materials 3 . Micro-CT is also used for evaluating the volumetric change in endodontic materials, with possible correlation with solubility 4 and dimensional change after immersion in distilled water 2 .…”

Section: Introductionmentioning

confidence: 99%

Micro-CT analysis of filling ability and porosity of root-end filling materials

Tanomaru‐Filho

Espir

Nogueira

et al. 2017

Rev. odontol. UNESP

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ResumoIntrodução: Capacidade de preenchimento da cavidade retrógrada e porosidade são propriedades importantes de materiais retrobturadores e podem ser avaliadas por meio de microtomografia computadorizada (micro-CT). Objetivo: Avaliar a capacidade de preenchimento e porosidade de materiais retrobturadores por meio de micro-CT. Material e método: Cavidades com 1 mm de diâmetro e 3 mm de altura foram preparadas em dentina bovina utilizando pontas ultrassônicas (CVD No. 6.1107-6) e foram preenchidas com Mineral Trióxido Agregado (MTA), Sealer 26 (S26) e cimento de óxido de zinco e eugenol (OZE). As cavidades foram escaneadas em micro-CT antes e após o preenchimento. A capacidade de preenchimento foi calculada com base na porcentagem em volume, das cavidades preenchidas. O número e porcentagem dos poros fechados foram avaliados em toda extensão da cavidade preenchida (total) e por terços (cervical, médio e apical) por meio de análises bi e tridimensionais. Os dados de preenchimento foram submetidos aos testes estatísticos ANOVA e Tukey e a porosidade aos testes de Kruskall-Wallis e Dunn, com nível de significância de 5%. Resultado: S26 e OZE apresentaram maior capacidade de preenchimento que o MTA (p<0,05). S26 mostrou maior porosidade total (em número e porcentagem) (p<0,05). Em todos os terços, após as análises 2D e 3D, a porosidade foi maior para S26 em comparação ao MTA e OZE (p<0,05). Conclusão: Embora Sealer 26 tenha apresentado maior porosidade, o material foi associado a uma adequada capacidade de preenchimento. A análise em micro-CT mostrou ausência de correlação entre capacidade de preenchimento e porosidade.Descritores: Microtomografia por Raio-X; porosidade; materiais dentários; endodontia. AbstractIntroduction: Filling ability of retrograde cavity and porosity are important properties for root-end filling materials and may be evaluated by using microcomputed tomography (micro-CT). Objective: To evaluate filling ability and porosity of root-end filling materials using microcomputed tomography (micro-CT). Material and method: Cavities with 1 mm internal diameter and 3 mm depth were prepared in bovine dentin sections by using ultrasonic tips (CVD No. 6.1107-6), and filled by Mineral Trioxide Aggregate (MTA); Sealer 26 (S26) and zinc oxide and eugenol cement (ZOE). Before and after filling, cavities were scanned by using micro-CT (SkyScan 1176). Filling and porosity were analyzed by using CTAn software. Filling ability was calculated based on volumetric percentage of the filled cavity. The number and percentage of closed pores were measured throughout entire extension of the filled cavity (total) and in each third (cervical, middle and apical), by using bi and tridimensional analyses. The filling data were submitted to ANOVA and Tukey statistical tests, and porosity data to Kruskall-Wallis and Dunn tests, at a 5% significance level. Result: S26 and ZOE presented higher filling ability than MTA (p<0.05). S26 showed the highest total porosity (number and percentage) (p<0.05). In all thirds after 2D and 3D an...

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3D micro‐CT analysis of the interface voids associated with Thermafil root fillings used with AH Plus or a flowable MTA sealer

Cited by 114 publications

References 50 publications

Push-out bond strength of MTA HP, a new high-plasticity calcium silicate-based cement

Push-out bond strength of MTA HP, a new high-plasticity calcium silicate-based cement

3D Micro-CT Analysis of Void and Gap Formation in Curved Root Canals

Micro-CT analysis of filling ability and porosity of root-end filling materials

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