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Home » Techniques » Provisional Restoration
To achieve the best results follow these recommended techniques.
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a) Before making tooth preparations, take an alginate impression (using the company's Supergel impression material), eliminate any air pockets, and with a curved shears, cut the interproximal areas from the impression. Moisten the impression and set it aside in a plastic bag for later use.
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b) After preparing the teeth and taking impressions for the laboratory, place 7-ml of Trim liquid into a mixing cup and add powder (13-ml by volume) in the appropriate shade.
Note: The temperature of the powder and liquid mix should be 72°- 75°'F. Spatulate to a creamy, honey-like consistency, which is usually achieved within one minute.
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c) Flow the resin mix into the desired areas of the alginate impression and allow it to cure until it reaches a putty-like consistency and no longer shines. Reset the impression in the mouth.
Note: Elapsed time for Stage One should be three minutes from mix to placement in the mouth.
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d) After approximately two minutes in the mouth, the Stage Two cure begins, and the resin achieves a rubbery rebound. (This highly elastic consistency simplifies removal from undercuts.)
Note: Do not allow the material to remain in the mouth longer than three minutes; it must not set in the mouth. The Trim bridge usually remains in place on the teeth. Have the patient close and maintain occlusion for an additional 30 seconds.
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e) Carefully tease the restoration off the teeth. While still in the rubbery stage, place the bridge in room temperature water (72°- 75°F) inside a pressure pot (pressurize to 30 psi) for 2-1/2 to five minutes. The result is a dense, void-free restoration of optimal hardness and shade color.
Note: As an alternative, the restoration can be left to self-cure for 15 minutes. Cementation can be achieved with any temporary ZOE cement.
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f)Using the company's multifluted acrylic burs, trim and contour the hardened restoration to a smooth finish.
Note: The burs assist the clinician in ob-taining optimal fit, style, and bulk reduction of excess acrylic resin.
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Apply one or two coats of the company's Glaze material to add a natural luster to the provisional.
Glaze also can be used in conjunction with indelible ink to simplify denture identification.
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