How to get the ultimate bond between the denture base and hybrid bar
Posted Feb 06, 2017
Hybrid dentures are growing in popularity but getting a strong bond between the denture base acrylic and the milled titanium bar can be challenging. And if you don’t achieve a strong bond, breakage can occur after the case has been inserted, even if you incorporate mechanical retention on the bar.
Four years ago, I came up with a method to eliminate any separation or breakage on my hybrid cases; in fact, I haven’t had the problem since. Here’s my technique:
- Before processing, sandblast the bar using 110-250μm aluminum oxide at a pressure of 2.5-3.5 bar.
- Paint metal primer onto the bar; I use GC’s Metal Primer.
- Apply a pre-opaque material onto the bar and light cure for three minutes. The pre-opaque is a clear resin material called VMLC from VITA North America that creates a great bond to the bar.
- Now you’re ready to apply the gingival...
