Tips from the technician
Helpful hints
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Fill major voids in the prep before impressing
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Smooth all sharp angles and adjacent contacts before impressing
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Describe the type of margins prepared
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Ensure all preps and contacts are parallel
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Pour all opposing models timely and accurately to avoid soft models and distortion
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Provide bite registration over the prepped teeth and opposing, even when using triple tray impressions
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Provide preop models, especially for anteriors
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Share future plans for patients with the technicians
Variables from the Lab
- Sloppy model work
- Voids on models and dies
- Loose fitting dies in base
- Mistrimmed margins
- Dies not blocked out accurately
- Opposing arch mismounted
- Contacts extremely tight or too loose
- Occlusions too heavy, or way out of occlusion
Variables from the Dentist
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Adjacent contacts concave or convex
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Path of insertion not parallel with preps and contacts
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Temps made without proper contacts or occlusion
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No bite registration
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Margins not clear in impression
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Voids in impression in critical areas
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Insufficient reduction on occlusal or facial
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Opposing poured with voids or distorted