17766624
Beschreibung
Mindmap von Alice Dolman, aktualisiert more than 1 year ago
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Erstellt von Alice Dolman
vor mehr als 5 Jahre
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A partial acrylic lingual plate is
commonly used as a transitional /
temporary denture connector. What
are the main disadvantages of using
this as a permanent connector?
- Acrylic plate description: Those RPDs constructed from acrylic are usually temporary and are for
those that have a history of problems with metal, or do not want to have clasps on their dentures.
Plates may be acrylic. Theyre cheaper and can be easily relined.
- 1. Acrylic is weaker and less rigid than the metal alloys and
therefore the denture is more likely to flex or fracture during
function.
- 2. To minimize flexing the acrylic connector has to be relatively
bulky. This, in turn, can cause problems with tolerance and offers less
scope for a design that allows the gingival margins to be left uncovered.
- . Especially when designing a lower APD the surface area is much smaller and little relief is given to the
gingival margins as the major connector must cover the abutment surfaces to provide additional strength
to the acrylic.
- . Especially when designing a lower APD the surface area is much smaller and little relief is given to the
gingival margins as the major connector must cover the abutment surfaces to provide additional strength
to the acrylic.
- 3. Another significant disadvantage of acrylic resin is that it is radiolucent
so that location of the prosthesis can prove difficult if the denture is
swallowed or inhaled.
- 4. Design issues cause tissue damage over time and with little to no tooth support the denture is primarily tissue
supported instead.
- For the APD to be tooth-supported metal alloys in the form of rests and clasps are integrated into the acrylic
major connector, however these connections are weak as there is no chemical bond present between stainless
steel and acrylic
- For the APD to be tooth-supported metal alloys in the form of rests and clasps are integrated into the acrylic
major connector, however these connections are weak as there is no chemical bond present between stainless
steel and acrylic
- 5. Some peoplehave an allergy to acrylic
- a lingual plate must be used because there is insufficient vertical space for a lingual bar.
This lack of space may be related to gingival recession, high muscle attachements, or high
frenum attachments on the lingual aspect of the mandibular arch.
- 6. A porous material suffering with a higher accumulation of plaque.
- 7. When comparing to a metal major connector, its thermal conductivity is inferior.
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