Principals of Tooth Preparation Flashcards
What is the main biological consideration in tooth preparation
prevention of damage during tooth preparation
What are two considerations to keep in mind involving the adjacent teeth during preparation
virgin teeth; avoid damage
adjacent restoration; contour correctly or polish
What is the consideration to keep in mind involving the soft tissues during preparation
biologic width
What is the hight of the biologic width
～ 5mm
Range; 0.2-6.73mm
Mean; 2.15-2.30mm
What two things occur if you encroach upon biologic width during preparation
inflammation
recession
What is one way to know if you are encroaching on the biologic width
retraction cord should be able to be below your margin without destroying the attached gingival connection
What are the three main finish lines used in a PFM
sloped shoulder
shoulder
beveled shoulder
What is the 90º angle shoulder from
the emergence profile; not the axial wall
What are three things to keep in mind involving the pulp during preparation
temperature
chemical actions
bacterial action
What two things can cause pulp temperature to ruse
friction; heavy pressure
dull burs and diamonds
What must be used to cool the tooth pulp during preparation
must use water to cool
What type of provisional materials can cause the pulp temperature to rise
PMMA materials
True or False
Many things irritate the pulp, but in most cases, the pulp can recover
True
This is a ZOE temporary cement that acts as a sedative
temp bond
The use of barriers is what
controversial
varnish before cemetation can inhibit retention
