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39 Cards in this Set
- Front
- Back
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What are the two main types of mandibular major connectors?
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Lingual Bar and Lingual Plate (linguoplate)
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Which mandibular major connector is half-pear shaped in longitudinal section with the thinnest part around the teeth and the thickest part near the apex of the teeth?
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Lingual bar
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What should you do when you want to place a lingual bar but there is a torus in the way?
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Remove the torus if it is too high or do NOT use a lingual bar
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What happens if a lingual bar is placed superior to a torus?
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The denture base may settle and the lingual bar will descend into contact with the thin mucosal covering of the torus and the effect is very painful
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What type of mandibular major connector is the one of choice for the routine prosthesis which has no unusual requirements?
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Lingual Bar
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Where does a lingual bar get its strength from?
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The thickness and the half-pear shaped cross section
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How far below the gingival margin of all the teeth should the superior border of a lingual bar be?
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3-4 mm
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Can you place a lingual bar if the gingiva is exposed and recedes on the lingual?
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No, because you don't have a proper amount of gingiva
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When should you use a lingual plate?
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When you don't have enough gingiva for the lingual bar
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What gives the lingual plate its strength?
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Its Width
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Where does the lingual plate extend up to?
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Lingual plate extends up to the contact point on the lingual surface
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How far apart should the minor connectors be in this clasp?
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Minimum of 5mm apart for Combination bar and plate
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Where is the inferior border of the lingual bar in relationship to the gingival margin?
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6-7mm below the gingival margin
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What is the width of the lingual bar?
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Usually 3mm
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T/F
Mandibular major connectors don't touch the tissue |
True they are not form fitted
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Which major connectors are form-fitted to the tissue?
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Maxillary major connectors
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Which major connectors don't touch the tissue?
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Mandibular Major connectors
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How far below the gingival margin should the maxillary major connectors be?
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5-6 mm below the gingival margin
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What could happen if a maxillary major connector is closer than 5-6 mm below the gingival margin?
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Could strangle the tissue around the roots of the teeth
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What are the five types of Maxillary Major Connectors?
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Palatal Bar
AP bar (anterior posterior) Palatal Strap Full palate Horseshoe (U-shaped) |
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What does the cross section of a palatal bar look like?
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Half moon
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When would you want to use a palatal bar?
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Don't want to use this too often unless it is a really small partial
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What is the thickness of a palatal bar?
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3-4mm
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What is the AP Bar a combination of?
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Anterior Bar and Posterior Strap or vice versa
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What shape is the bar in an AP bar in cross section?
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Half-pear shaped
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How wide must the strap be in an AP bar?
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at least 8mm wide
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What connector would you use to avoid palatal tori?
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AP bar
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How far back can you have a AP bar on the palate?
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Anterior to the vibrating line, it cannot go to the post dam
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What are the dimensions required for a palatal strap?
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Must be at least 8mm in width and 1mm thick (any smaller and it is considered a bar)
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What is a relatively smooth strap that goes across the palate?
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Palatal Strap
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Why are palatal straps well accepted by the patient?
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They are ~1mm thick, which is not very bulky
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Which maxillary partial denture provides the maximum support for a partial?
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Full Palate
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Which partial denture major connector provides a snow shoe effect?
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Full Palate - force is exerted on it and is fully supported by the tissue
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Which partial extends all the way back to the vibrating line, so you must cut in a post dam?
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Full Palate
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What is a Horseshoe (U-shaped) partial good for?
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Avoiding palatal Torus - especially good in medically compromised people who cannot withstand a torus surgery.
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What properties must major connectors possess to be considered permanent?
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Rigidity and Cross arch stabilization
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What part of the partial goes from the major connector to the terminus?
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Minor connector
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What are the dimensions of minor connectors?
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~2.5mm - 1.5mm tapering wider from the major connector to thinner to the terminus
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What major connectors are useful for avoiding tori?
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Horseshoe (U-shaped)
AP Bar |
