Telescopic dentures made of the NPM CoCrMo
with controllable friction using SAE spark erosion
- CAD/CAM milled or cast double crowns with precision fit – primarily made of the base metal CoCrMo alloy
- Secondary constructions using the SAE solid cast procedure made of the NPM CoCrMo - biocompatible
- Controllable friction using friction pins fitted parallel to each other using dental spark erosion
With the double crowns made of the NPM CoCrMo, the cone angle of 5 - 6° is dispensed with. This is an advantage for the aesthetics as there is then more room available for the acrylic or ceramic veneer. The long-term, controllable friction bonding of these SAE double crowns milled at 2° is effected respectively by a friction pin. The grooves for the friction pins are spark eroded, parallel to each other. The pin is attached securely to the secondary crown by laser welding. There is no soldering involved of non-biocompatible materials.
SAE double crowns have been proved and tested for 25 years.