LOGIN
 
Share Page:
Back

Volume 4 , Issue 2
Summer 1989

Pages 131-137


Microstructure and Mechanical Properties of Ti-Ta/Alumina and Ti-Nb/Alumina Joints for Dental Implants

B. Gibbesch/G. Elssner, Dr/G. Petzow, Prof Dr


PMID: 2689337

The microstructure of Ti-Ta and Ti-Nb alloys diffusion bonded to a 99.7 wt% Al2O3 ceramic for dental implants is subdivided into a reaction double layer containing the phases TiAl and Ti3Al, a transition region of coarse α-Ti plates in β-Ti, and the unaffected bulk metal, the α-Ti/β-Ti structure of which can be refined by annealing at 800 C for 1 hour after bonding. Optimized joints fabricated by diffusion bonding in a high vacuum at 1,200 C from a 99.7 wt% Al2O3 ceramic and Ti-Ta alloys fitted in their thermal contraction behavior to that of the ceramic by the addition of 30 to 40 wt% Ta showed a fracture resistance of 2.3 MN/m3/2. Approximately 80% of the bend test specimens notched at the Ti-Ta/alumina interface failed by crack extension parallel to the interface within the ceramic, which is typical for a metal-ceramic bond of high to medium interfacial strength. ( INT J ORAL MAXILLOFAC IMPLANTS 1989;4:131-137.)

Key words: bond strength, dental implant, interfacial microstructure


Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.

 

© 2014 Quintessence Publishing Co, Inc JOMI Home
Current Issue
Ahead of Print
Archive
Author Guidelines
About
Accepted Manuscripts
Submission Form
Submit
Reprints
Permission
Advertising
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us
Help