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Article: Volume 44 Number 1 Page 81 - January 2017

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  Dent Update 2017; 44: 81-81

Technique Tips:  A New Look at Repairing Fractured Metal-Ceramic Restorations: Use of a Universal Bonding System and Resin Composite, following Sandblasting

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Abstract: The fracture of the ceramic from a metal-ceramic restoration may often lead to an emergency attendance, as previously explained.1 It is the aim of this technique tip to describe a contemporary method of repairing fractured metal-ceramic restorations using only the Cojet sand included in the Cojet system (3M ESPE) but not the other components. Cojet sand contains 30 micron aluminium oxide particles modified with silicic acid: the metal surface is sandblasted with this at a pressure of 0.25 MPa at a distance of 1 cm, causing the surface to become impregnated with silica. This facilitates a bond to resin composite using a silane. In the illustrated case report, the facing debonded from the bridge pontic. The defective bridge was isolated with rubber dam, the patient was provided with a nosepiece and protective eyewear.

Author notes: FJT Burke, DDS, MSc, MDS, MGDS, FDS(RCS Edin), FDS RCS(Eng), FFGDP(UK), FADM, Primary Dental Care Research Group, University of Birmingham School of Dentistry, 5 Mill Pool Way, Pebble Mill, Birmingham B5 7EG, UK.