19
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Estudio comparativo de adhesión a dentina por medio de resistencia al desalojo por empuje entre sistemas con y sin grabado ácido Translated title: Dentin shear bond comparative study using the push out method between systems with and without acid etching

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Resumen Los adhesivos dentinarios de autograbado ofrecen un avance significativo en la reducción de pasos con relación a los de grabado ácido, además de los beneficios ya conocidos de adhesión a esmalte y dentina en su uso clínico. Existen algunos estudios comparativos con respecto a la fuerza de unión a dentina de sistemas con y sin grabado ácido, reportando la mayoría de estos valores menores con los sistemas de autograbado. Así mismo la técnica que se ha empleado para realizar estas valoraciones son de tensión, cizallamiento y de microtensión pero ninguna por el método de desalojo. Objetivo Valorar y comparar el grado de adhesión de una restauración directa de resina sobre dentina utilizando dos sistemas de adhesión de autograbado y uno con grabado ácido. Método Se colectaron 45 molares humanos extraídos, los cuales se dividieron aleatoriamente en tres grupos de 15 muestras, a las cuales se les realizaron cortes y cavidades que fueron restauradas con resina y se valoró la adhesión utilizando la técnica de desalojo por empuje. A los valores se les aplicó análisis estadístico de ANOVA de una vía y prueba de Tukey. Resultados No existió diferencia estadísticamente significativa entre AdheSE (26.8 MPa) y Single Bond (25.6 MPa) pero sí de éstos con Prompt L-Pop (10.6 MPa) Conclusión El sistema adhesivo sin grabado ácido AdheSE obtuvo valores de adhesión con el método de desalojo comparables al sistema con grabado ácido.

          Translated abstract

          Abstract Self-etching dentin adhesives offer a significant advance in step reduction in relation to phosphoric acid etchants, besides the well-known benefits such as clinical enamel and dentin adhesion. There are many comparative studies regarding dentin bond strength (with and without acid etching), most of them reporting low values for self-etching systems. These evaluations have been made using microtensile, shear bond and tension tests, but none of them had used the push out method. Objective To evaluate and compare the adhesion quality of composite resin direct restorations in dentin using two adhesion systems with self-etchant and with phosphoric acid etchant. Method 45 human extracted molars were collected and randomly divided into 3 groups with 15 samples each. The teeth were sectioned and restored with composite resin. Adhesion was evaluated using the push out resistance technique. ANOVA statistical analysis was made using one-way and Tukey test. Results No statistical significant differences between AdheSE (26.8 MPa) and Single Bond (25.6 MPa), but there was with Prompt L-pop (10.6 MPa) were observed. Conclusion The adhesive system without etchant (AdheSE), obtained adhesion values similar to those obtained with the phosphoric acid-etching system.

          Related collections

          Most cited references20

          • Record: found
          • Abstract: found
          • Article: not found

          Relationship between surface area for adhesion and tensile bond strength--evaluation of a micro-tensile bond test.

          The purpose of this study was to test the null hypothesis that there is no relationship between the bonded surface area of dentin and the tensile strength of adhesive materials. The enamel was removed from the occlusal surface of extracted human third molars, and the entire flat surface was covered with resin composite bonded to the dentin to form a flat resin composite crown. Twenty-four hours later, the bonded specimens were sectioned parallel to the long axis of the tooth into 10-20 thin sections whose upper part was composed of resin composite with the lower half being dentin. These small sections were trimmed using a high speed diamond bur into an hourglass shape with the narrowest portion at the bonded interface. Surface area was varied by altering the specimen thickness and width. Tensile bond strength was measured using custom-made grips in a universal testing machine. Tensile bond strength was inversely related to bonded surface area. At surface areas below 0.4 mm2, the tensile bond strengths were about 55 MPa for Clearfil Liner Bond 2 (Kuraray Co., Ltd.), 38 MPa for Scotchbond MP (3M Dental Products), and 20 MPa for Vitremer (3M Dental Products). At these small surface areas all of the bond failures were adhesive in nature. This new method permits measurement of high bond strengths without cohesive failure of dentin. It also permits multiple measurements to be made within a single tooth.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Adhesion testing of dentin bonding agents: a review.

            Adhesion testing of dentin bonding agents was reviewed starting with the adhesion substrate, dentin, the variables involved in etching, priming and bonding, storage variables and testing variables. Several recent reports attempting to standardize many of these variables were discussed. Recent advances in the development of new bonding systems have resulted in bond strengths on the order of 20-30 MPa. At these high bond strengths, most of the bond failure modes have been cohesive in dentin. As this precludes measurement of interfacial bond strength, new testing methods must be developed. One such new method, a microtensile method, was described along with preliminary results that have been obtained. The last decade has produced major advances in dentin bonding. The next decade should prove to be even more exciting.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Evidence of chemical bonding at biomaterial-hard tissue interfaces.

              For many years, glass-polyalkenoate cements have been described as possessing the unique properties of self-adherence to human hard tissues, such as bones or teeth. However, direct experimental evidence to prove the existence of chemical bonding has not been advanced. X-ray Photoelectron Spectroscopy (XPS) was used to analyze the chemical interaction of a synthesized polyalkenoic acid with enamel and synthetic hydroxyapatite. For both enamel and hydroxyapatite, the peak representing the carboxyl groups of the polyalkenoic acid was detected to have significantly shifted to a lower binding energy. De-convolution of this shifted peak disclosed two components with a peak representing unreacted carboxyl groups and a peak suggesting chemical bonding to hydroxyapatite. On average, 67.5% of the carboxyl groups of the polyalkenoic acid were measured to have bonded to hydroxyapatite. XPS of hydroxyapatite also disclosed its surface to be enriched in calcium and decreased in phosphorus, indicating that phosphorus was extracted at a relatively higher rate than calcium. Analysis of these data supports the mechanism in which carboxylic groups replace phosphate ions (PO4(3-)) of the substrate and make ionic bonds with calcium ions of hydroxyapatite. It is concluded that an ultrathin layer of a polyalkenoic acid can be prepared on a hydroxyapatite-based substrate by careful removal of non-bonded molecules. With this specimen-processing method, XPS not only provided direct evidence of chemical bonding, but also enabled us to quantify the percentages of functional groups of the polyalkenoic acids that bonded to calcium of hydroxyapatite.
                Bookmark

                Author and article information

                Journal
                rom
                Revista odontológica mexicana
                Rev. Odont. Mex
                Universidad Nacional Autónoma de México, Facultad de Odontología (México, DF, Mexico )
                1870-199X
                2007
                : 11
                : 4
                : 181-184
                Affiliations
                [1] orgnameUniversidad Nacional Autónoma de México orgdiv1Facultad de Odontología orgdiv2DEPeI Mexico
                [2] orgnameUniversidad Nacional Autónoma de México orgdiv1Facultad de Odontología orgdiv2DEPeI Mexico
                Article
                S1870-199X2007000400181 S1870-199X(07)01100400181
                10.22201/fo.1870199xp.2007.11.4.15722
                4c58dd2d-7a07-458c-ac77-04b0e8ebde72

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 21, Pages: 4
                Product

                SciELO Mexico

                Categories
                Trabajos originales

                grabado ácido,Adhesives,shear bond strength,acid etchant,Adhesivos,resistencia al desalojo

                Comments

                Comment on this article