Micromechanical versus chemical bonding between CoCr alloys and methacrylate resins

Craig W. Barclay, Donald Spence, William R.E. Laird, Peter M. Marquis, Liam Blunt

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Introduction: As adhesive systems for bonding to metals have developed in dentistry, considerable importance is attached to the preparation of the metal alloy for both mechanical and chemical bonding. Different grit sizes when sandblasting Cobalt Chromium (CoCr) will provide a different three-dimensional surface for bonding. Previous reports have shown that 4-Methacryloyloxyethyl trimellitic anhydride (4-Meta) resins offer high bond strengths to CoCr alloy, with various surface preparations providing varying bond strengths. The relevance of this to bond strength was assessed. Objectives: The aim of the study was to evaluate the importance of grit size of alumina in the preparation of CoCr alloy and to determine the effect on the tensile bond strength of four different acrylic resins to the CoCr alloy. Methods: Ten specimens were prepared within each group of four resins. Four grit sizes were assessed, 50, 110, 250 μm, and a range from 180 to 330 μm. The specimens were tested both within one day of production after storing at 37°C in phosphate-buffered saline for seven days and after thermocycling. Results: Grit size resulted in a change in average contact surface area available for bonding. A significant difference (p < 0.01) existed in bond strengths between each of the materials, but no significant difference (p = 0.0673) was determined when different grit sizes were included. Significance: It was concluded that grit size determined the available contact surface area of CoCr alloy for bonding but did not determine the bond strength that could be achieved between acrylic resins and CoCr alloy as a result of the poor adaptation of the resin to the complex surface topography.

LanguageEnglish
Pages351-357
Number of pages7
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume81B
Issue number2
Early online date4 Apr 2007
DOIs
Publication statusPublished - May 2007

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Chromium Alloys
Cobalt alloys
Chromium alloys
Methacrylates
Resins
Acrylic Resins
Acrylics
Metals
Dentistry
Aluminum Oxide
Thermal cycling
Surface topography
Chromium
Cobalt
Adhesives
Phosphates
Alumina

Cite this

Barclay, Craig W. ; Spence, Donald ; Laird, William R.E. ; Marquis, Peter M. ; Blunt, Liam. / Micromechanical versus chemical bonding between CoCr alloys and methacrylate resins. In: Journal of Biomedical Materials Research - Part B Applied Biomaterials. 2007 ; Vol. 81B, No. 2. pp. 351-357.
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Micromechanical versus chemical bonding between CoCr alloys and methacrylate resins. / Barclay, Craig W.; Spence, Donald; Laird, William R.E.; Marquis, Peter M.; Blunt, Liam.

In: Journal of Biomedical Materials Research - Part B Applied Biomaterials, Vol. 81B, No. 2, 05.2007, p. 351-357.

Research output: Contribution to journalArticle

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AU - Laird, William R.E.

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AB - Introduction: As adhesive systems for bonding to metals have developed in dentistry, considerable importance is attached to the preparation of the metal alloy for both mechanical and chemical bonding. Different grit sizes when sandblasting Cobalt Chromium (CoCr) will provide a different three-dimensional surface for bonding. Previous reports have shown that 4-Methacryloyloxyethyl trimellitic anhydride (4-Meta) resins offer high bond strengths to CoCr alloy, with various surface preparations providing varying bond strengths. The relevance of this to bond strength was assessed. Objectives: The aim of the study was to evaluate the importance of grit size of alumina in the preparation of CoCr alloy and to determine the effect on the tensile bond strength of four different acrylic resins to the CoCr alloy. Methods: Ten specimens were prepared within each group of four resins. Four grit sizes were assessed, 50, 110, 250 μm, and a range from 180 to 330 μm. The specimens were tested both within one day of production after storing at 37°C in phosphate-buffered saline for seven days and after thermocycling. Results: Grit size resulted in a change in average contact surface area available for bonding. A significant difference (p < 0.01) existed in bond strengths between each of the materials, but no significant difference (p = 0.0673) was determined when different grit sizes were included. Significance: It was concluded that grit size determined the available contact surface area of CoCr alloy for bonding but did not determine the bond strength that could be achieved between acrylic resins and CoCr alloy as a result of the poor adaptation of the resin to the complex surface topography.

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