Use an alloy with at least a 230 Vickers Hardness.
Use an overcasting or an individual metal housing.
The VSS Patrix has smooth, parallel sides on the attachment section and the remaining bar has a 2 degree taper which simplifies the fitting of an overcasting onto the implant bar frame. The bar pattern can be reduced along the base as well as the mesial and distal areas to fit the required space. The VSS has three levels of retention: green (light), yellow (medium), and red (high); however the retentiveness can be customized on a per patient basis by simply polishing the implant bar frame until a comfortable grip is achieved.
Three levels of retention
Can be used in any application where a bar is required
Large contact area makes for improved stability
Extremely secure and comfortable for the patient