RESUMEN

BACKGROUND: AH Plus, an epoxy resin-based sealer, is widely used in endodontic practice, owing to its good physical properties that confers longstanding dimensional stability and good adhesion to dentin. Nevertheless, its propensity to trigger inflammation, especially in its freshly mixed state, has been extensively documented. Phytochemicals such as Petasin, Pachymic acid, Curcumin, and Shilajit are known for their anti-inflammatory and analgesic effects. This study aimed to analyze and determine the effect of these natural products on the physical properties of AH Plus sealer when incorporated with the sealer. METHODS: AH Plus (AHR) sealer was mixed with 10% petasin, 0.75% pachymic, 0.5% and 6%shilajit to obtain AHP, AHA, AHC and AHS in the ratio of 10:1 and 5:1 respectively. Five samples of each material were assessed for setting time, solubility, flow, and dimensional stability in accordance with the ISO 6876:2012 standardization. Sealers were characterized through scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy, X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. Statistical evaluation involved the Kolmogorov-Smirnov and Shapiro-Wilks tests for normality and the one-way ANOVA test for analysis. RESULTS: In this investigation, the characterisation analysis revealed a relatively similar microstructure in all the experimental root canal sealers. All experimental groups, excluding the control group, exhibited an increase in flow ranging from 11.9 to 31.4% at a 10:1 ratio. Similarly, for the 5:1 ratio, the increase ranged from 12.02 to 31.83%. In terms of dimensional stability, all groups at the 10:1 ratio showed a decrease compared to the control group. The addition of natural agents to AHR in 10:1 ratio led to a reduction in setting time by 8.9-31.6%, and at a 5:1 ratio, the reduction ranged from 8.1 to 31.5%. However, regarding solubility, the addition of natural agents did not induce any significant alterations. CONCLUSION: Based on the results of this study, it can be concluded that all tested root canal sealers exhibited properties that met the acceptable criteria outlined in the ISO 6876:2012 standardization.

Asunto(s)

RESUMEN

Background: This study investigated the effects of different acidic solutions used as the final irrigation on the push-out bond strength (PBS) of resin-based and bioceramic-based root canal sealers. Methods: 100 single root and canal human incisors were selected and decorated. Root canal shaping was done with ProTaper Next rotary files up to X4 and rinsed with 5 mL of 5.25% NaOCl between each file. Then, teeth were divided into five main groups according to the final irrigation (n=20). Group 1: glycolic acid; Group 2: phosphoric acid; Group 3: citric acid; Group 4: EDTA and group 5: saline. Then, each group was divided into two subgroups according to the canal sealer used (n=10). The groups filled with bioceramic-based sealer (bioserra) were named A, and the groups filled with resin-based sealer (AH Plus) were called B. PBS test was applied to one of the two samples obtained from the coronal third of each root. The data were statistically analyzed using a two-way analysis of variance and Tukey's HSD test (α=0.05). Results: Statistically, the highest PBS value was obtained in group 2A (4.81±0.03 MPa), which was irrigated with phosphoric acid and filled with bioserra, and the lowest PBS value was obtained in group 5B (1.10±0,03), which was irrigated with saline and filled with AH Plus (P<0.05). There was a statistical difference between all groups except group 1A and group 3A (P<0.05). Conclusion: The bioceramic-based root canal sealer (bioserra) bond strength is superior to resin-based (AH Plus). Phosphoric acid, glycolic acid, and citric acid can be an alternative to EDTA.

RESUMEN

Introducción: La obturación del sistema de conductos presenta un papel clave en el éxito del tratamiento de endodoncia. En un intento de mejorar las propiedades de los cementos selladores, recientemente se han introducido en el mercado los cementos selladores a base de silicatos. Por ello, al llevar a cabo la obturación del sistema de conductos, es de utilidad conocer las propiedades físicas que los diferentes cementos selladores presentan. Objetivo: El objetivo del presente trabajo fue la revisión bibliográfi ca de las propiedades físicas de utilidad clínica que presentan los nuevos cementos a base de silicatos, y compararlas con las propiedades físicas de los cementos convencionales a base de resina epóxica. Material y método: Tras establecer la pregunta de investigación adaptada, se llevó a cabo una revisión de la literatura en dos bases de datos (Medline vía Pubmed y Wiley Library vía Biblioteca Chrocane) combinando términos MeSH (Medical Subject Headings) y términos libres. Además, se llevó a cabo una búsqueda electrónica manual. Las propiedades físicas de utilidad clínica seleccionadas fueron la decoloración, capacidad de sellado, radiopacidad, tiempo de fraguado y solubilidad. Resultados: Se obtuvieron 224 estudios potenciales. Finalmente, aplicando los criterios de inclusión y exclusión, se incluyeron 22 estudios en la revisión. Los distintos estudios compararon diferentes propiedades físicas de los cementos a base de silicatos, comparándolos con los cementos a base de resina. (AU)

Introduction: In the endodontic treatment success, the fi lling of the root canal system plays a key role. To improve properties of the sealers used in these treatments, new silicate-based sealers have recently been introduced into the market. Therefore, when performing the endodontic treatment, it is useful to know the physical properties of the different sealers. Objectives: The aim of the present study was to review the literature and compare the clinically useful physical properties of the new silicate-based cements with the physical properties of conventional epoxy resin-based cements. Methods: After establishing the adapted research question, a literature review was carried out in two databases (Medline via Pubmed and Wiley Library via Chrocane Library) combining MeSH (Medical Subject Headings) and free terms. In addition, a manual electronic search was performed. The clinically useful physical properties selected were discolouration, sealability, radiopacity, setting time and solubility. Results: A total of 224 potential studies were obtained and 20 were selected for full text reading. Additionally, 4 studies were selected through electronic handsearching. After exclusion of 2 studies, 22 studies were fi nally included in the review, which analyzed the following physical properties: 2 tooth discolouration; 4 sealing ability; 11 radiopacity; 9 setting time; and 12 solubility. 9 of the selected articles evaluated several properties. (AU)

Asunto(s)

RESUMEN

PURPOSE: This study aimed to examine novel techniques using prototype endodontic obturators to obturate a resin-based sealer. METHODS: Powder-liquid ratios of MetaSEAL Soft were changed to obtain suitable root canal sealing, and the physical properties for various powder-liquid ratios were analyzed according to ISO-6876. Tensile bond strength was also examined. Prototype endodontic obturators with a combination of thread numbers and pitch angles were analyzed for sealing ability after MetaSEAL Soft was obturated in simulated root canals. RESULTS: Powder-liquid ratios of 1.0:1, 1.1:1, 1.2:1, and 1.3:1 showed suitable physical properties; however, flow for 1.4:1 was below a standard value. Tensile bond strength increased gradually when the powder-liquid ratio changed from 1.0:1 to 1.3:1, and 1.3:1 and 1.4:1 showed the highest and lowest bond strengths, respectively. Sealing ability increased when pitch angles of the obturators were 5°, 8°, and 11°; 11° showed the best results. Similarly, sealing ability increased when the thread number was 12, 17, and 22 pitches; 22 showed the best results. CONCLUSION: These findings suggest that the prototype endodontic obturator can be useful for obturating MetaSEAL Soft, and a powder-liquid ratio of 1.3:1 MetaSEAL Soft may be the most suitable for achieving excellent sealing.

Asunto(s)

RESUMEN

Introduction: Filling in the root canal system plays a key role in the success of endodontic treatment. New silicate-based sealers have recently been introduced on the market to improve the properties of sealers used in these treatments. Before performing endodontic treatment, it is always useful to know the properties of different sealers. Objectives: The aim of this study was to review the literature and compare the clinically useful properties of new silicate-based sealers with those of conventional epoxy resin-based cements. Methods: After establishing the adapted research question, a literature review was carried out in two databases (Medline via Pubmed and Wiley Library via Cochrane Library) combining MeSH (Medical Subject Headings) and free terms. A manual electronic search was also performed. The clinically useful properties selected were discolouration, sealing capacity, radiopacity, setting time and solubility. Results: Of the 224 potential studies obtained, 20 were selected for reading of the full text. Another 4 studies were selected after manual electronic searching of which 2 were excluded, leaving 22 studies for inclusion in the review. The following physical properties were analysed: 2 for tooth discolouration; 4 for sealing ability; 11 for radiopacity; 9 for setting time; and 12 for solubility; 9 of the articles evaluated several properties. Conclusions: No differences in tooth discolouration were observed between silicate-based and resin sealers. No differences in sealing ability were observed in most of the studies consulted. All sealers analysed showed radiopacity values within the recommended standards. Both setting time and solubility depended on the type of sealer; with some of the silicate-based sealers having higher solubility than the resin-based. (AU)

Asunto(s)

RESUMEN

AIM: Compare the displacement resistance of AH Plus, Ad Seal and Real Seal on dentine discs (DDs) treated with 10% citric acid, 17% EDTA or 2.5% NaOCl, through a new push-out test method. METHODOLOGY: From the middle third of the roots of 15 maxillary central incisors, three dentine discs 1 ± 0.1 mm thick were obtained. On the axial surface of each dentine disc, three 1.2-mm-wide holes were drilled. In the third dentine disc from the same root, each hole was treated with one of three irrigating solutions for 30 s, rinsed with distilled water and dried. Each hole of the same dentine disc was filled with sealer, and the discs were maintained at 37 °C for 7 days. The dentine discs were fixed on a testing machine to test the shear strength. Data were compared using the univariate anova test with a 5% significance level. The Tukey test was used for multiple comparisons. RESULTS: The irrigating solutions did not affect the adhesion of the sealers (P > 0.05). There was no significant difference between the Ad Seal and AHPlus (P > 0.05); however, Real Seal had a significantly lower shear bond strength (P < 0.05). CONCLUSION: The use of different irrigating solutions did not affect resistance to the displacement of resin sealers. Real Seal sealer was less resistant than Ad Seal and AHPlus.

Asunto(s)

RESUMEN

INTRODUCTION: The purpose of this study was to evaluate the effects of ultrasonic activation on the filling quality (intratubular sealer penetration, interfacial adaptation, and presence of voids) of 4 epoxy resin-based sealers. METHODS: Eighty-four extracted human canines were divided into 4 groups (n = 20) according to the sealer used to obturate the root canals instrumented with F5 ProTaper instruments (50/05) (Dentsply Maillefer, Ballaigues, Switzerland). The canals were filled by the lateral compaction technique. Previously, the sealers were labeled with rhodamine B dye to allow analysis under a confocal microscope. At the time of obturation, the specimens were divided again into 2 groups (n = 10) according to the ultrasonic activation of the sealers: ultrasonically activated and nonultrasonically activated groups. All samples were sectioned at 2, 4, and 6 mm from the apex. The percentages of voids, gaps, and dentinal sealer penetration segments of the canal were analyzed. RESULTS: Regarding the sealer penetration segments, there was a significant increase for the AH Plus (Dentsply Maillefer), Acroseal (Specialités Septodont, Saint Maur-des-Fossés, France), and Sealer 26 (Dentsply Maillefer) at the 4-mm level and the AH Plus and Sealer 26 at the 6-mm level with ultrasonic activation (P < .05). Concerning the gaps, the ultrasonic activation promoted a smaller presence for all sealers at the 4- and 6-mm levels (P < .05). No statistical significant differences were found for the percentages of voids (P < .05). CONCLUSIONS: The use of ultrasonic activation of an epoxy resin-based sealer promoted greater dentinal sealer penetration and less presence of gaps.

Asunto(s)