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31 Cards in this Set
- Front
- Back
Where is the word Pontic derived from?
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-Latin, meaning bridge
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What is a pontic?
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-Artificial tooth on a fixed denture prosthesis that replaces a missing natural tooth, restoring it fx.
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What should be consider in relation to Biologic factor?
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-Cleansable tissue surface
-Access to abutment teeth -No presure on ridge |
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What should be consider in relation to Mechanical factor?
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-Rigid (deformation)
-Strong connectors (fracture) -Metal-ceramic framework (procelain fracture) |
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What should be consider in relation to Esthetic factor?
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-Shaped to look like a tooth
-Appears to grow out of edentulous ridge -Sufficient space for porcelain |
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What is the requirements of pontics?
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-Restoration of function & esthetics
-Oral hygiene -Biologically acceptable |
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What type of texture should pontic be?
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-Glazed or highly polished procelain and gold with a mirror-like finish
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Tissue contact of pontic should be active contacting on keratinized attached tissue (T/F)
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False: Should be passively contacting on keratinized attached tissue
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Describe the classificaiton of edentulous ridge deformities?
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-Class I: Loss of faciolingual ridge w/ normal apicocoronal height
-Class II: Loss of ridge height w/ normal labiolingual dimensions -Class III: Loss of both ridge width and height |
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What are the technique to management of available ridge?
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1. Socket preservation technique: bone graft
2. Full-thickness soft tissue grafts 3. Pouch procedure 4.Ridge augmentation 5. Immediate pontic technique 6. Orthodontic forced eruption |
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Which ridge management technique involves subepithelial placement of CT graft from the tuberosity?
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-Pouch Procedure
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What are the pontic design classificaiton?
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1. Mucosal contact:
-Ridge Lap -Modified Ridge Lap -Ovate -Conical 2. No Mucosal Contact: -Sanitary (Hygienic) -Modified Sanitary |
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Ideal pontic should be designed as follows:
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-Surfaces smooth, well finished & convex in all directions
-Pin-point pressure free contact -For posterior pontics --> Occlusal table shoul dbe harmonious with opposing teeth -Emergence profile and pontic length should be harmonious with adjacent abutment teeth |
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What is the indication and contraindication for Sanitary (Hygienic) pontic?
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-Good access for oral hygiene
-Indicated for posteiror mandibular teeth -Contraindicated in esthetic zone or linted VDO |
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What is the disadvantages for Sanitary (Hygienic) pontic?
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-Food entrapment
-Feels odd against tongue |
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Describe the Sanitary pontic?
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-Not used often
-Convex undersurface -All metal is preferred -3mm thickness - |
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Described Modified Sanitary Pontic?
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-Gingival portion shape like an arch
-Concave MD -Easy to clean -Increased connector size -Mechanical strength to prevent flexure |
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Describe Ridge lap (Saddle) pontic?
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-Concave intaglio surface
-Proposed to enhance esthetics -Not amenable to oral hygiene -Not recommended |
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Describe the Modified Ridge Lap pontic?
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-Overlaps the residual ridge on the facial side
-Clear the ridge on lingual side -Recommended in highly esthetic location -Moderately easy to clean -Not enough air seal for speech -Passive & compact contact on attche dgingiva -Tissue contact look like a T from gingival aspect |
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Describe Conical Pontic?
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-AKA Egg-shaped, bullet-shaped
-Limited use for thin ridges -In molar w/o esthetic requirements -Point contact w/ the ridge -Convex surfaces -Good access for oral hygiene |
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Describe ovate pontics?
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-Most esthetically appealling design
-Used for max. incisors, canines, premolars -High smile line -Convex tissue surfaces -Good emergence profile -Accessible to oral hygiene |
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Which type of pontic design require surgical preparation?
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-Ovate Pontic
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Does Ovate pontic have negative effect on gingival?
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-No, ovate pontic supported by good oral hygiene was NOT ass. w/ overt clinical signs of inflammation
-Histologically, pontic design ass. w/ thinner kertain layer and diff. composition of CT |
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What is a Multiple pontic designs?
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-Pink porcelain to simulate interdental papilla
-Reduces the number of surfaces and complexity of restoration -Improves accessibility to oral hygiene -Reduces tongue toys |
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What are some consideration in Tissue contacint Pontics?
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-Pontic length/width
-Location of finish lines -Gingival embrasures -Edentulous flange -Lip support |
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The increased of the ___ ___ may be attributed to the accumulated effects of hte presence of ____ ___ and ___.
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-Index values
-Subgingival margins and Pontics |
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The increased in ___ ___ should mainly be ascribed to the prescene of ___ ___ ___.
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-Pocket depth
-Subgingival retainer margin |
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What oral hygiene product is highly recommended to use w/ pontic?
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-Proxy brushes, Oral B-Super floss, Dental floss w/ a threader
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Contact tissue w/ pontic tips only when needed. If tissue contact is indicated, it should be ___, and limited to as little surface area as possible.
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-Passive
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Passive contact should occur on ___ ___ ___.
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-Keratinized Attached tissue
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___ ___ design should be avoided b/c the concave gingival surface of the pontic is not accessible to clean with dental floss.
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-Ridge Lap Design
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