Prosthodontics Chapter 50 Flashcards
what are examples of a fixed prosthesis
inlay, onlay, crowns, bridges and veneers
prosthesis is a
artificial replacment of a body part
dental prosthesis is a
device or appliance that replaces one or more missing teeth & structures
contraindications of fixed prosthodontics
- necessary tissues are diseased or missing
- suitable abudtment teeth are missing
- pt in poor health & or not motivated
- poor oral hygeine
- cannot afford treatment
indicstions of a fixed prosthodontic
- tissues are healthy
- pt is in good health
- skill and motivation for treatment
- 1 or 2 teeth mssing in same arch
indirect restorations are created in a ___ and are ___
in a lab, permanently cemeted inplace
what material can inlays and onlays be made of
gold, porcelain or composite resin
direct veneers arw AKA
bonded veneers
what is opaquer
a substance placed on the tooth under a veneer, its not translucent or transparent and dosent let light through
3/4 crown is covering
3 surfaces of anterior, 4 of posterior
what is a soulder joint
where two adjacent points or a bridge are attached to eachother
what are the 4 parts of a 3 unit bridge
2 crowns, abudment teeth, pontic
what is a die
an exact replica of the tooth needing prosthesis
what are the 3 ginigival margin prep designs
bevel, chamfer, shoulder
bevel is a
anglenof anything but 90
shoulder is
a 90 degree angle
chamfer is
a tapered angle
core build ups are completed on
vital teeth
can a post and core be done on a vital tooth
no
when is gingival retraction completed
after the tooth is prepped, before the final impression
when placing retraction cords what direction is it placed and removed
placed clockwise. removed counter clockwise
when would you use a smaler cord
on anterior teeth where tissues are thinner snd fragile
when is it appropriate to use a two cord system
if the sulcus is wider and deeper
non impregnated cords
do not contain chemicals. move tissues by physicsl force only
what is an impregnated cord
contains an astringent to control bleeding and amount of retraction
what kind of impregnated cord would you use on a cardio patient
hemodent cord. contains aluminum chloride
hemostatic solutions are used to
control bleeding
epinepherine is only safe to use in cords when
the patient does not have heart issues
what instrument is used to pack cords
cord packer. woodson. pfi. any blunt instrument
what are hypertrophied tissues
excessive gingival tissue
what is used for surgical retraction
electrosurgery
final impression is aka
mater impression
what are the 4 types of elastometric materials
poly sulfide, poly ether, silicone, polysiloxane
curing of elastometric materials occurs in 3 stages. those being
intial set, final set, final cure
what is dimesional stability
the materials ability to keep shape when removed from the mouth
deformation is
materials ability to resist permenant change caused by stress of removal
permanent deformation is when
the material is changed and dosent return
3 types of bite registration
wax bite, polysiloxane and ZOE
what type of wax is used to add length and depth to a tray
utility wax
border moulding is used to capture mucobuccal fold tissues and is completed with use of
sticky wax
sol refers to the
solution state, prior to setting
gel is the
solid state
imbibtion is when material
absorbs additional water and expands
synersis is when materials
lose water snd shrink
what changed a reversible hydrocolloid back to its orginial state
thermal change
hysterisis is the
change in temp resulting in physical change
CAD
Computer aided design
CAM
Computer aided manufacturing
reversible hydrocolloids are composed of
85% water 15% agar
Components of a removable partial denture
framework, connectors, clasps/retainers, rests
I-clasps sit how on the teeth
upward towards the occlusal
C-Clasps sit on the teeth by
hugging the tooth
rests are designed in RPD to
prevent movement downward towards the gingiva
On a full denture the base is the
part that fits over the alveolar ridge
flange is the part of a complete denture that
extends over the gingival mucosa
post dam is to
create a suction seal by extending toward the soft palate over the tuberosities
Protrusion is when the mandible is
placed forward from centric
retrusion is when the mandible is
placed posteriorly from centric
what is lateral excrusion
sliding of the mandible to the left and right of centric
what teeth do over dentures commonly sit on
canines
short coping technique is used on
endo treated teeth
the long coping technique removes how much natural tooth structure
small amount
what is relining a denture
placing a new layer of resin over the tissue surface
rebasing a denture consists of
replacing the entire denture base
what are tissue condidtioners used for
rehabilitation of unhealthy tissues
