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Definition
| These are custom made chair-side by the doctor or the assistant from a mold of the patient's own tooth prior to it being prepared for a crown. |
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Term
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Definition
| These are metal shell teeth which come in carious sizes and are used mainly for bicuspids and molars. The length and contour against the gingival margin can be adjusted by cutting off the excess with the crown and bridge scissors. |
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Term
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Definition
| these are like the metal shell temps in that they are shaped and sied to match actual teeth, however they are made of tooth colored plastic. Thus, they are more suitable for anterior temporaries which esthetics is of primary concern. |
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Term
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Definition
| A preliminary mold using an alginate or small putty impression is made of the tooth to be browned or bridged prior to the preparation or reduction of the tooth. |
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Term
| Snap, Trim, and Jet temps |
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Definition
| Some of the older brands of acrylic material. The powder and liquid is mixed in a dappen dish to the desired consistency. The unset plastic material is then picked up with a spatula or lubricated fingers and placed in the preliminary mold of the tooth. The mold is then fully reseated in the patient's mouth and allowed to set approximately 2 minutes. It is then removed from the mouth before fully hardened and tried on and off several times until fully set. The plastic shrinks as it sets and trying it on and off prevents the setting temporary from sticking to the tooth. NOTE: The patient should also be biting into the soft temporary to adjust the bite and prevent it from being too high. |
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Term
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Definition
| This is used in a similar manner as Snap, Jet and Trim acrylics except, there is no mixing of powder and liquid in a dappen dish. This material is injected directly from the gun into the pre-op impression of the tooth which is then seated in the patients mouth. It should be removed in exactly 2 minutes (verify with the brand u are using), then tried on and off to prevent getting stuck. It is then trimmed using ACRYLIC BURS, polished and cemented w/ TEMP BOND or other temporary cement. Any voids or bubbles in the temporary can be repaired w/ light-cured FLOWABLE COMPOSITE. |
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Term
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Definition
Easily and quickly made, but unesthetic due to their metal color. An impression fo the tooth is NOT needed as the crown shells are prefabricated in various sizes. A caliper or small ruler will help determine the size of the metal temporary to be selected. Measure the space from the distal of the anterior tooth to the mesial of the posterior tooth adjacent to the one being prepared. You ca then find the appropriate size in the assortment which is also divided into RIGHT, LEFT, UPPER and LOWER teeth.
The METAL SHELL TEMP is then tried in the mouth to verifity that the fit and your selection are correct. If it is slightly high, have the patient bite gently so as to bend and crimp the soft metal on the occlusal to fit properly. IF the metal shell is too long, then trim to a shorter length with the CROWN AND BRIDGE SCISSORS so that the gingival margin of the temp does not impinge on the gums. The metal temp is then cemented in the patient's mouth w/ a very THICK mix of IRM CEMENT. fill the metal shell crown nearly full w/ IRM, place the temp onto the tooth and have the patient gently bite it into place. Before the cement is completely hardened, remove the excess which has extruded using an explorer or cotton swab. |
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Term
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Definition
| When a tooth is badly broken down or decayed extensively, there may not be enough tooth structure or "stump" to hold onto a crown. |
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