Double Screw Metal Technique 


Production of full-arch prosthetics on divergent implants


The production of full-arch prosthetics on divergent implants is one of the most challenging restorations for a techno-clinical team. In the current case, a patient presented with complete maxillary edentulism and six implants already placed in the upper jaw. The virtual tooth set-up revealed a strong divergence of the implants towards the vestibular area. To strike a balance between function, stability and aesthetics in the final restoration, a hybrid restoration was produced using the Double Screw Metal technique.
 

The planned restoration consisted of a titanium bar and a secondary framework made of Denture Gingiva Basic resin with 14 individual resin crowns made of Abro® Basic Multistratum®. The design of the primary structure incorporated an innovative CAD/CAM workflow, in which four additional screws were integrated to screw the superstructure to the bar. The virtual position of the screws was visualised using the new Double Screw Metal function of the Zirkonzahn.Modellier software (Attachment module), which allows the generation of virtual screw threads within the bar design. The 3D rendering also provides the optimal position of the screw channel in the primary structure, as well as the ideal fit of the screw head in the superstructure.
 

The titanium bar is then screwed to the implants and the secondary structure to the bar. With the Double Screw metal technique it is now possible to avoid unaesthetic vestibular channels, in order to produce highly stable, bar-supported rehabilitations even in complex cases without compromising the full arch aesthetics.

 

 
     
 
 
 
 

Intelligent solutions – with Zirkonzahn digital workflow


 
 

CAD/CAM Thread milling bur 2 G Titan (6 mm) &
CAD/CAM Thread milling bur 2 G CrCo (6 mm)


With special thread shape for milling threaded channels (standard thread diameter M2.0).


 

Milling bur for titanium
Número do produto:
FR1401

 
 

Milling bur for chrome-cobalt
Número do produto:
FR2401

     
 
 

Double Screw Metal Screw


Screw for screwing the secondary structure onto the bar.

Note: This screw is also compatible with OSSTEM Implant Convertible Abutment.
 


 

Número do produto: BSAE5532

 

 

     
 
 

Screwdriver for Double Screw Metal Screw


To use with Adapter Ratchet Wrench (SIAK0001). Different lengths available.

Note: The screwdrivers are also part of the Dentsply Sirona® XiVE® system.
 


 

Número do produto: SIAK4012L10

 



Número do produto: SIAK4012L15

 



Número do produto: SIAK4012L20

 



Número do produto: SIAK4012L35

     
 
 

White Metal Scanmarker DSM L6


For acquiring the exact position and inclination of the threaded screw channel in the bar for the Double Screw Metal technique. Can be used both on the model and in the patient's mouth. Only compatible with Zirkonzahn Double Screw Metal system and only applicable in combination with metal bars manufactured with the Double Screw Metal technique.  

 

Número do produto:  ZBFD0101L06