Prosthetics 4 - Saddles and Connectors Flashcards Preview

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Flashcards in Prosthetics 4 - Saddles and Connectors Deck (21)
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acrylic denture - 2 advantages?

- low cost
- easily modified


acrylic denture - indications?

- where life expectancy of denture is short
- if additions are likely to happen
- where there are few remaining teeth


cobalt chromium based dentures - advantages?

- strong and rigid in thin section
- less bulky
- more hygienic if properly designed (covers less tissue)


cobalt chromium based dentures - disadvantages?

- more expensive
- difficult to add to
- requires accurate impression


general aim of prosthodontic treatment?

construct an appliance which is:
-does not damage oral tissues


what is a saddle and what does it carry?

it is part of the partial denture which carries the artificial teeth and replaces lost tissue


what is a free-ended saddle?

a saddle with a single abutment tooth at the mesial end of the saddle


what is a critical abutment tooth? (what happens when it is lost?)

a tooth that turns a bounded saddle into a free-ended one if lost e.g. lone posterior molar


design of saddles:
extension - what does it allow?

allows the spread of the load onto the mucosal surfaces


design of saddles:
shape of polished surface - what happens if it's bulbous or when it's concave?

bulbous polished surface: not retentive
concave polished surface: allows cheek and tongue to rest properly


design of saddles:
what are the types of flange designs?

- full
- part
- flangeless


implications of flangeless denture?

it is gum fitted, therefore the tooth sits directly on the ridge
this will cause it to lose its retention properties


what is a connector? what are the 2 general types?

a part of the partial denture which unites other components
- can be major or minor


what is a major connector?
what are the materials it can be made of?

a plate or bar which:
- unites partial denture saddles
- provides bracing
- provides indirect retention
- acts as a splint: holds things in place

can be made of acrylic, cobalt chromium, gold (rarely)


what are some major connectors for lower partial dentures?

- lingual plate (co/cr)
- dental bar
- lingual bar
- split lingual plate (for when there are gaps in teeth)
- swinglock denture


major connectors for upper partial dentures?

- base plate: maximum palatal coverage. can be acrylic or co/cr
- spoon denture/t-denture
- anterior palatal bar (can have horseshoe connector)
- mid palatal bar
- posterior palatal bar


what will be required when there is a free-ended and bounded saddle in one denture?

more extensive coverage: needs more palatal coverage and support


sectional maxillary dentures: what is the safety issue?

it is a tiny denture that replaces one missing tooth; therefore there is a risk that it be inhaled or swallowed by patient


what is a minor connector?

the connecting component between the major connector or base of a partial denture and other units such as clasps and rests


what needs to be considered for connector design?

occlusion needs to be considered; articulated casts required, shows how upper & lower jaw meet together


what needs to be done if the space for occlusion is tight? what is an example of this?

- modifications need to be carried out, such as the placement of a striking plate; can be cast to fit patient's mouth