. Dental World – Artículos de Endodoncia .. Ultrasonido. El uso de la ultrasonido influyó en la eliminación de algunos de los componentes de PALABRAS CLAVE: endodoncia, espectroscopía de energía dispersiva. El objetivo del presente artículo es realizar una revisión bibliográfica de los trabajos las puntas de ultrasonidos que permiten realizar pequeñas y ajustadas cavidades retrógradas; .. Actualización en cirugía endodoncia.
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This study evaluated the cleanliness of post space after different irrigation protocols, associated or not to the use of ultrasound.
Roots were cleaved in mesiodistal direction, prepared for scanning electron microscope Enrodoncia to evaluate the smear layer and debris presence and for energy dispersive spectroscopy EDS analyses, to evaluate chemical components of dentin after treatment. EDS analysis showed the presence of chemical components of filling material in the samples from all groups. SEM images showed large amount of obliterated dentinal tubules. It was concluded that none of the irrigating solutions, associated or not to the use of ultrasound were able to completely clean the post space.
The use of prefabricated glass fiber post has been widely accepted in dentistry, particularly in anterior tooth. Their modulus of elasticity, similar to dentin, allows better dissipation of masticatory loads to tooth structure Marchi et al.
ultrasonido en endodoncia by Rodrigo Cantillano Becerra on Prezi
Moreover, they have also advantages such as esthetics, biocompatibility, and corrosion resistance Fernandes et al. Clinical studies have demonstrated favorable results regarding the use of those posts in medium-term Cagidiaco et al.
However, bonding to root canal dentine remains a challenge because of limited access and visibility. The difficulty to completely remove root canal filling will result in material remnants on root dentin walls, and the presence of such residues impairs the adhesion of glass ultrasonio post.
Thus, several methods have been tested aiming to completely remove filling material, for adequate luting of intraradicular post Coniglio et al. The tip of the device operates not touching dentinal walls, shaking irrigating substances. Bubbler resulted from that agitation forms burst and increase temperature and pressure, which results in a wave impact against root canal walls, removing debris van der Sluis et al.
Some previous studies evaluated the cleaning of post space using different irrigants and materials, by optical and scanning electronic microscope SEM analyses Coniglio et al. However, those methods are qualitative, while energy ultarsonido spectroscopy EDS analysis of root dentin walls allows quantifying and identifying the chemical remaining components, and differentiating constituents of filling material and tooth.
The aim in this study was to evaluate the cleaning of post space after different irrigation protocols, associated or not to ultrasound. The Null hypotheses of this study are: Selection and sample preparation. Roots with 18 mm in length were obtained. Preparation and cleaning of post space.
articulos de ultrasonido en endodoncia pdf
The cleaning of post space was conducted using different protocols, divided into six groups Table I. The EDS analysis was conducted to endosoncia remnants of chemical aryiculos on dentin surface after different cleaning protocols used.
The origin of each chemical element quantified is shown in Table II. Statistical analysis was performed two-way Anova and Tukey’s test: One root of each group was sectioned in mesiodistal direction, dehydrated in alcohol and metallized for scanning electronic microscope SEM observation.
Description of groups according to irrigants used and association to ultrasound application. Origin of chemical elements quantified on EDS analysis.
Among the elements of the filling material, there was a uotrasonido significant articuloa in the weight percent of tungsten. According the components of tooth, there was significant difference in carbon,calcium, oxygen and phosphorus concentrations. Upon comparing the use of the substance with and without ultrasound, there was a significant reduction in weight percent for zinc and silicon, regardless of the substance used. For the other elements, there was no influence of the use of ultrasound Table V.
Figure 1 is a representative image of dentin surface of post space for raticulos groups of the present study. Weight percentage of each element of filling material gutta-percha and sealerwith and without the association ultrasoniod ultrasound.
Scanning electron microscopy SEM images of dentin walls of post spaces without association to ultrasound a: Water and with association to ultrasound b: The null hypothesis that there is no difference between irrigating solutions used to clean the post space was accepted. However, the other two null hypotheses, the use of ultrasound does not influence the cleaning of post space and, the association between afticulos and irrigating substances does not influence the post space cleaning, were rejected.
The smear layer is a cluster of dentin shavings, irrigants and organic and inorganic tissues, generated after root canal instrumentation. Since it is poorly adhered to dentin walls, its removal is performed by the chelating action of EDTA, before root filling Castagna et al.
Tratamiento Endodóntico no Instrumentado en dientes deciduos
endodoncka According to the literature, the presence of remnant smear layer on dentin surface is articuos a negative factor in terms of adhesion on root canal, since it acts as a physical barrier between arriculos filling material and the dentin walls Eldeniz et al.
Moreover, the sealer, which has adhesion impaired by the presence of smear layer, weak adhesion might occur between resin cement and the dentinal walls after post space preparation. This is articluos part attributed to the presence of remnants of filling material Bitter et al. Besides gutta-percha, sealer residues might also influence post adhesion due to the residual chemical effect of some of their constituents in resin cement polymerization.
Some studies have shown that the presence of eugenol and other components ultrasonixo affect the post retention Mayhew et al. This fact might explain the difficulty in totally cleaning dentin walls in the present study, since chemical components of sealer and gutta-percha were observed through EDS analysis.
An effective adhesion between resin cement and dentin walls is required for luting of aesthetic posts. Those remnants are not poorly adhered like the smear layer, and for improving their removal, some drills and irrigants can be used Bitter et al.
In this study, we used some irrigant solutions, combined or not with ultrasound, seeking for an improved cleaning of dentin walls, possibly with complete removal of remnants.
The use of ultrasound in association with irrigants after ulgrasonido might assist in removing the smear layer, since the vibration produced contributes to a better cleaning of the channel system, in comparison with the irrigating solution alone Haapasalo et al. This study, which enddodoncia the efficacy of irrigants associated to ultrasonic excitation for cleaning dentin walls of post space, detected improved cleaning aspect when associating ultrasound to irrigants.
Although the association of ultrasound with irrigating solutions, for improved cleaning of dentin walls of post space was effective, it did not lead to complete cleaning, once chemical components of filling materials were observed through Ultarsonido analysis. Thus, more studies should be conducted to understand the influence of those remnants in bonding of posts to dentinal walls, and also more investigations e effective approaches for complete cleaning of post space with no alterations on tooth structure.
Effect of cleaning method, luting agent and preparation procedure on the retention of fibre posts. Clinical studies of fiber posts: Surface change of root canal dentin after the use of irrigation activation protocols: Effect of passive ultrassonic instrumentation as a final irrigation protocol on debris and smear layer removal–a SEM analysis.
Post space debridement in oval-shaped canals: Post space cleaning using a new nickel titanium endodontic drill combined with different cleaning regimens. The effect of smear layer on the push-out bond strength of root canal calcium silicate cements. Shear bond strength of three resin based sealers to dentin with and without the smear layer.
Factors determining post selection: Effect of EDTA with and without surfactants or ultrasonics on removal of smear layer. Effect of remaining dentine structure and thermal-mechanical aging on the fracture resistance of bovine roots with different post and core systems. Effect of root canal sealers and irrigation agents endodonciw retention dw preformed posts luted with a resin cement.
Effectiveness of passive ultrasonic irrigation in improving elimination of smear layer and opening dentinal tubules. The effect of dowel space on the bond strengths of fiber posts. Surface debris of canal walls after post space preparation in endodontically treated teeth: Ultrasound effects after post space preparation: Evaluation of apical sealing ability and adaptation to dentine of two resin-based sealers.
Passive ultrasonic irrigation of the root canal: Effect of post-space treatment on retention of fiber posts in different root regions using two self-etching systems. Comparison of fracture resistance between cast posts and fiber posts: