Comparación de la fuerza de adhesión de brackets utilizando dos métodos de acondicionamiento para porcelana

Claudia Ballesteros Pinzón; Jesús A. Bermúdez Lozano; Nelly Coronel Corzo; Edwin de León Goenaga; Linda P. Delgado; Liliana Báez Quintero

COMPARISON OF THE SHEAR BOND STRENGTH OF BRACKETS USING TWO SURFACE CONDITIONING METHODS FOR PORCELAIN

Research Articles

Claudia Ballesteros Pinzón Ver Biografía

Universidad Cooperativa de Colombia, sede Medellín

Jesús A. Bermúdez Lozano Ver Biografía

Universidad Santo Tomas

Nelly Coronel Corzo Ver Biografía

Pontificia Universidad Javeriana

Edwin de León Goenaga Ver Biografía

Colegio Odontológico Colombiano

Linda P. Delgado Ver Biografía

Pontificia Universidad Javeriana

Liliana Báez Quintero Ver Biografía

Universidad Nacional de Colombia

Introduction: During 2010 the degree research “Comparison of the shear bond strength of brackets using two surface conditioning methods for porcelain” was carried out at Universidad Cooperativa de Colombia in Bogota. Objective: To determine the shear bond strength of metal brackets cemented on porcelain using two surface conditioning methods.

Materials and methods: Forty human premolars were used and prepared for further cementing porcelain-metal crowns. There were two groups of 20 teeth each one; Group 1 was conditioned with 9.6% hydrofluoric acid and silane coupling agents (hfa + s). Group 2 used 37% phosphoric acid and Primer porcelain (fa + pp). Then metal brackets were bonded using adhesive and Transbond xt resin. Samples were tested for shear bond strength with Instron, a universal testing machine.

Results: The highest shear bond strength was given by Group 2 (fa + pp) with a 9.4 MPa average, but Group 1 (hfa + s) a 7.0 MPa value (p = 0.006).

Conclusions: The chemical bonding method of 37% phosphoric acid and Primer porcelain provides better results of shear bond strength of metal brackets on porcelain surfaces and prevents to expose patients to toxic effects of hydrofluoric acid, reported in literature; also possible porcelain structure damage is minimized using acid etching.

Keywords: hydrofluoric acid, adhesion, porcelain, Primer porcelain, silane

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COMPARISON OF THE SHEAR BOND STRENGTH OF BRACKETS USING TWO SURFACE CONDITIONING METHODS FOR PORCELAIN. (2014). Revista Nacional De Odontología, 7(13), 12-19. https://revistas.ucc.edu.co/index.php/od/article/view/288

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Vol. 7 No. 13 (2011)

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2014-01-19

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