Experimental Investigations on the Influence of Adhesive Oxides on the Metal-Ceramic Bond

Metals

Susanne Enghardt²  Gert Richter²  Edgar Richter¹  Bernd Reitemeier²  Michael H. Walter² 

[1] Forschungszentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, Bautzner Landstr, 400 D-01328 Dresden, Germany; E-Mail:;Department of Prosthetic Dentistry, Faculty of Medicine, Technische Universität Dresden, Fetscherstr, 74 D-01307 Dresden, Germany; E-Mails:

关键词: alloy;    ion implantation;    shear bond strength;    metal-ceramic bond;    mechanical bond;    chemical bond;   

DOI  :  10.3390/met5010119

来源: mdpi

【 摘 要 】

The objective of this study was to test the influence of selected base metals, which act as oxide formers, on the metal-ceramic bond of dental veneer systems. Using ion implantation techniques, ions of Al, In and Cu were introduced into near-surface layers of a noble metal alloy containing no base metals. A noble metal alloy with base metals added for oxide formation was used as a reference. Both alloys were coated with a low-temperature fusing dental ceramic. Specimens without ion implantation or with Al₂O₃ air abrasion were used as controls. The test procedures comprised the Schwickerath shear bond strength test (ISO 9693-1), profile height (surface roughness) measurements (ISO 4287; ISO 4288; ISO 25178), scanning electron microscopy (SEM) imaging, auger electron spectroscopy (AES) and energy dispersive X-ray analysis (EDX). Ion implantation resulted in no increase in bond strength. The highest shear bond strengths were achieved after oxidation in air and air abrasion with Al₂O₃ (41.5 MPa and 47.8 MPa respectively). There was a positive correlation between shear bond strength and profile height. After air abrasion, a pronounced structuring of the surface occurred compared to ion implantation. The established concentration shifts in alloy and ceramic could be reproduced. However, their positive effects on shear bond strength were not confirmed. The mechanical bond appears to be of greater importance for metal-ceramic bonding.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.