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24 Cards in this Set
- Front
- Back
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Objectives of Impression Making
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PRESS
1. Preservation 2. Retention 3. Esthetics 4. Support 5. Stability |
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Primary stress bearing area of mandible
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Buccal shelf
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Primary stress bearing area of maxilla
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Residual ridge and most of the hard palate
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Secondary stress bearing area of mandible
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Residual ridge
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Secondary stress bearing area of maxilla
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Rugae
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Relief areas
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- Median suture
- Tori - Incisive papilla - Zygomatic processes - Mental foramen - Prominent genial tubercles - Boney prominences |
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factors affecting the foundation for complete dentures
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- Age
- Medical status (diabetes, osteoporosis) - Length of time edentulous - Wearing of dentures - Opposing occlusion |
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Epulis Fissuratum
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Redundant tissue caused by pressure on the soft tissue
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Purposes for making custom tray
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1. Accuracy of fit
2. Control of border extension 3. Control of final impression material 4. Assure uniform thickness of impression material |
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Tray Over extension causes:
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Tissue injury
Loss of retention/stability |
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Tray under extension
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Less than ideal retention/stability
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When border molding, have the patient move the jaw side to side to register the ________
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coronoid processes
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If patient has a sore throat due to mandibular denture, it's from pressure on the _________
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superior constrictor
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What is the theory of impression making used in the complete denture impression technique at BCDS?
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Selective Pressure
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What are the likely clinical consequences of an overextended impression?
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Tissue injury and/or loss of retention & stability
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What type of impression material is used
most commonly for complete denture final impressions? |
Light-bodied poly vinyl siloxane
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What type of implant impression technique uses impression copings which are removed from the mouth and reseated into the impression prior to pouring the master cast?
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transfer impression
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What is the clinical implication of the snowshoe principle relative to border extension?
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The borders of a complete denture should be extended to the maximum permitted by the physiologic limits imposed by the surrounding tissues.
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What is the most effective method of obtaining tissue health prior to final impressions?
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Tissue rest (refraining from denture use) is the most effective method.
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What is the land area and how is it developed?
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The land area is an artificially created area of a master cast used to delineate the useful limits of the impression. It is created during beading and boxing by forming a flat spot below the peripheral border of the impression with either rope wax or the pumice/ plaster mix.
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What muscle of the lower lip may interefere with the mandibular prosthesis in cases of atrophy or hyperactivity?
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Mentalis m.
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What muscle is the major muscle of the floor of the mouth?
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The mylohyoid muscle is the major muscle of the floor of the mouth.
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Who am I ? I am a triangular soft tissue mass that is very resistant to resorption. I am also a reliable guide to the plane of occlusion.
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Retromolar pad
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Who am I ? I am a sensitive structure in the maxillary midline who is helpful in selecting and arranging teeth.
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Incisive papilla
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