- Duplicate master model.
- Articulate duplicate model.
- Open the bite on the articulator 2.5 to 3.0 mm in the anterior region.
- Wax appliance as usual engaging undercuts. Do not block out undercuts. Peripheral borders should have approximately a 1/8 inch roll. The vault area may be waxed thinner than 1/8 inch as this area does not directly absorb shock. To insure the finished appliance will articulate properly in the mouth, the wax-up should include all the upper teeth and the impression of the lower teeth.
- Prior to investing the wax-up, Vaseline all surfaces of the stone model.
- Invest-boil out-paint with separator.
- Mix the Therm-O-Flex® 3:1, powder to liquid (or 21:6, powder to liquid for a slightly firmer appliance).
- Material is ready to pack when it no longer feels tacky.
- Pack the material in the upper half of the flask using a Cellophane sheet between it and the model.
- Trial pack the material twice using an elastophane sheet at the final closure.
- Transfer flask to rigid clamp or press.
- Cure the material a minimum of five hours at 165°F (this is the preferred method of curing). If a shorter processing time is desired, leave material in the flask in press for 15 minutes, after which time insert it into boiling water for one hour.
- Recover occlusal appliance with model intact (reason for Vaseline in number 5) above.
- Re-articulate and refine occlusion.
- Place model and appliance in boiling water for 30 seconds. After 30 seconds remove model from appliance and cool.
- Finish using duplicate model to check for extensions and undercuts.
- Return appliance to doctor with master model intact.
- Do not put appliance in heat-sealed bag, as the material will remain milky for a longer period of time. Please allow 48 hours for material to become clear.
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