The Kolbeck Technique

Josef Kolbeck · Technical · Mar 2012

As Managing Director of the removable department at Town & Country Dental Studios in Freeport, NY, Josef Kolbeck has implemented a unique method of processing a fixed removable denture with the pouring technique that saves time and materials and increases accuracy. It eliminates duplication of a secondary plaster model and, instead, uses a silicone working model that allows easy handling and adjusting during processing, and provides a more exact fit and placement of the screws into the access holes.

After treatment planning and implant placement, the dentist sends an open-tray impression of the implant fixtures and the lab fabricates a soft tissue cast with analogs, a verification jig and a screw-retained bite rim. The doctor verifies the clinical accuracy of the soft tissue model and takes a bite registration with the stabilized bite rim. Kolbeck sets the denture teeth in wax and sends back a trial setup on the stabilized bite rim. Once it's verified, he makes a denture matrix of the teeth to the model and silicone index, scans the approved setup and master cast, and sends the data to Nobel Biocare for the fabrication of a CAD/CAM titanium framework.

Nobel Biocare virtually designs the case and, after the laboratory approves the design, the framework is returned to the lab in five days. Kolbeck transfers the setup to the framework and sends it back to the doctor for try-in. He then uses his own technique to fabricate the rest of the case:

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Step-By-Step
  • Step 1: After the wax try-in has been verified by the dentist, Kolbeck transfers the case to a new working silicone matrix model. To fabricate the model, he uses a rubber base and a firm silicone lab putty material for strength and accuracy, and makes sure all screws are totally seated into the new working model.

  • Step 1: After the wax try-in has been verified by the dentist, Kolbeck transfers the case to a new working silicone matrix model. To fabricate the model, he uses a rubber base and a firm silicone lab putty material for strength and accuracy, and makes sure all screws are totally seated into the new working model.

  • Step 2: Next, he pours the hydrocolloid material into the aluminum flask. He bench cools the flask for 15 minutes for an initial set, then puts it into cool water for another 15 minutes.

  • Step 3:He removes the model from the flask.

  • Step 4: Kolbeck cuts the duplicate material in two pieces for easy insertion of the working model.

  • Step 5: He boils out the wax from the framework and the teeth.

  • Step 6: He prepares the teeth with retention holes, then places the teeth and the working model back on the hydrocolloid flask.

  • Step 7: He mixes the fluid resin acrylic for less than 15 seconds to avoid bubbles, then pours it into the access holes until the excess comes out of the air vent holes.

  • Step 8: He places the aluminum flask into the pressure pot for 15 to 25 minutes.

  • Step 9: After deflasking the fixed denture, he cuts and grinds the edges.

  • Step 10: The final, seated denture after adjusting and polishing.

  • Step 10: The final, seated denture after adjusting and polishing.

  • Josef Kolbeck is the Managing Director of the removable department at Town & Country Dental Studios in Freeport, NY. He tests new materials and techniques to improve the lab's fabrication processes and has created many innovative techniques, including the Kolbeck Technique illustrated here.

About the Author
Josef Kolbeck

Removable Department Supervisor

Kolbeck is part technician, part innovator: he continually tests new materials and techniques to improve the lab's fabrication processes and has created many original techniques, including the Kolbeck...See more

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