Prostho - Finals Flashcards
(32 cards)
A suspended member of a FPD, replacing the lost natural tooth and its
function.
Pontic
Pontin design is dictated by
Function
Esthetics
Ease of cleaning
Functions of Pontics
- Restore aesthetics
- Mastication
- Speech restoration
- Maintain occlusal harmony
- Maintain oral hygiene and gingival health
REQUIREMENTS OF A PONTIC
- Restore function of the tooth it replaces.
- Meet demand of esthetic and comfort.
- Biologically acceptable to tissue.
- Sanitation
- Prevent tissue inflammation.
Types of Pontic Design: According to material
- Porcelain
- Metal (for posterior teeth)
- Metal and porcelain facing
- Acrylic temporary (wear, bad odor, porous, easily discolored)
- Metal and acrylic facing
Types of Pontic Design: According to support
Fixed-fixed pontic
- Fixed-supported pontic
- Free end pontic
Looks most like a tooth, replacing all the contours of the missing tooth.
Saddle type
Fills the embrasure and overlaps the ridge with a large concave contact.
Saddle type
The shape is cleanable but triangular spaces around the tissue contact have
a tendency to collect debris.
Conical`
Do not have any contact with tissue.
Hygienic
restore function and stabilize adjacent teeth.
Hygienic
Use on non-appearance zone.
- May be made entirely of metal.
Hygienic
Thickness of hygienic pontic design should’t be less than
3 mm
Give the appearance of being a tooth but all surface are convex for ease of
cleaning.
Ridge lap
Contact starts at the crest of the ridge, whereby the lingual has a slight
deflective contour in order to prevent food impaction and minimize plaque
accumulation.
Ridge lap
recommended location of hygienic pontic design
Posterior Mandible
Advantages of hygienic design
Good access for oral hygiene
Disadvantage of sanitary/hygienic design
poor esthetics
Recommended location of saddle-ridge-lap pontic design
Not recommended
Advantages of Saddle-ridge-lap
esthetic
Disadvantages of Saddle-ridge-lap pontic design
not amenable to oral hygiene
Recommended location for conical pontic design
molars without esthetic requirement
advantage of conical pontic design
good access for oral hygiene
disadvantage for conical pontic design
poor esthetics
