<abstract xmlns="http://www.w3.org/1999/xhtml">

<italic>Background</italic>: The bond strengths and mode of failure of stainless steel orthodontic brackets bonded to the newer all-ceramic crown systems has not been fully investigated.
<italic>Objectives</italic>: To compare the shear-peel bond strengths and modes of failure of stainless steel Begg orthodontic brackets bonded to all-ceramic crown systems (Finesse, Empress II) and a conventional feldsphatic crown porcelain (Vita Omega 900).
<italic>Methods</italic>: Fifteen flat-surface discs of three crown porcelains (Finesse, Vita Omega 900, Empress II) were made and mounted in acrylic moulds. The discs were pumiced, etched with phosphoric acid, primed with silane, and a flat stainless steel Begg bracket bonded to each disc with a chemical cure composite resin (Unite Bond). The discs were stored for one week in water and debonded with a sheer-peel load in an Instron uniaxial testing system with a crosshead speed of 0.5 mm/min. The composite remnants on the ceramic surfaces were classified using the Adhesive Remnant Index (ARI).
<italic>Results</italic>: The bond strength of Finesse (15.03 ± 1.90 MPa) was significantly greater (<italic>p</italic> &lt; 0.001) than Vita Omega 900 (11.51 ± 2.35 MPa) and Empress II (11.12 ± 1.78 MPa). There were no significant differences among the ARI scores. The mode of failure was a mixture of adhesive and cohesive failure.
<italic>Conclusion</italic>: The results indicate that the bond strengths of stainless steel orthodontic brackets bonded to Finesse and Empress II porcelains are clinically acceptable.
</abstract>

Background: The bond strengths and mode of failure of stainless steel orthodontic brackets bonded to the newer all-ceramic crown systems has not been fully investigated.
Objectives: To compare the shear-peel bond strengths and modes of failure of stainless steel Begg orthodontic brackets bonded to all-ceramic crown systems (Finesse, Empress II) and a conventional feldsphatic crown porcelain (Vita Omega 900).
Methods: Fifteen flat-surface discs of three crown porcelains (Finesse, Vita Omega 900, Empress II) were made and mounted in acrylic moulds. The discs were pumiced, etched with phosphoric acid, primed with silane, and a flat stainless steel Begg bracket bonded to each disc with a chemical cure composite resin (Unite Bond). The discs were stored for one week in water and debonded with a sheer-peel load in an Instron uniaxial testing system with a crosshead speed of 0.5 mm/min. The composite remnants on the ceramic surfaces were classified using the Adhesive Remnant Index (ARI).
Results: The bond strength of Finesse (15.03 ± 1.90 MPa) was significantly greater (p < 0.001) than Vita Omega 900 (11.51 ± 2.35 MPa) and Empress II (11.12 ± 1.78 MPa). There were no significant differences among the ARI scores. The mode of failure was a mixture of adhesive and cohesive failure.
Conclusion: The results indicate that the bond strengths of stainless steel orthodontic brackets bonded to Finesse and Empress II porcelains are clinically acceptable.

Comparison of the bond strength of stainless steel orthodontic brackets bonded to crown porcelains

Australasian Orthodontic Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

Background: The bond strengths and mode of failure of stainless steel orthodontic brackets bonded to the newer all-ceramic crown systems has not been fully...

Comparison of the bond strength of stainless steel orthodontic brackets bonded to crown porcelains

Pubblicato online: 13 dic 2023

Pagine: 19 - 23

Ricevuto: 01 nov 2003

Accettato: 01 ago 2004

DOI: https://doi.org/10.2478/aoj-2005-0003

© 2005 Siew Han Chay et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.