Flashcards in Ideal Class II Preps, Bases, and Liners Deck (38)
What is done in the initial stage of prep design?
Outline form and initial depth
What is done in the final stage of prep design?
Removal of any remaining enamel pits and fissures, infected dentin, or old restoration
Secondary retention and resistance form
Finish enamel walls
Cleaning, inspecting, conditioning
Resistance form definition
Shape and placement of the cavity walls that enable the tooth to withstand forces in teh long axis of the tooth
Retention form definition
Shape or form that resists the displacement/removal of the restoration from tipping or lifting forces
Convenience form definition
The shape or form that makes prepping the cavity (observing and accessing) the easiest
What are the functions of the of the Dentin-Pulpal complex?
Formative - 1' and 2' dentin
Defensive - repairative dentin
Nutritive - supplies vital cells
Sensory - protective
T/F - The only sense to stimuli the Dentin-Pulpal complex recognizes is pain
Describe the Hydrodynamic Theory of Pain
Micromovement of fluid in tubules affect nerves
Can sense osmolarity, thermal, and pressure changes, dessication, and high-speed cutting
What are the three Pulp Statuses that are diagnosed?
Pulpitis (reversible and irriversible)
What are the ways to diagnose pulpitis?
What are the characteristics of tooth pain we should ask about?
Cause of onset
Painful when patient bites?
What are the clinical methods to test pulp status?
Electric Pulp Test
What is one of the most common forms of tooth pain?
What is the hallmark sign of Irreversible pulpitis?
Sensitivity to heat and not cold
What is the sign of necrotic pulp?
No response to stimuli
Why do we use liners and bases?
To protect the pulp from and minimize post-op sensitivity
Acts as a chemical, thermal, electrical, mechanical, barrier
Controls inflammation of pulp
Controls fluid movements
Relatively thin layers of material used primarily to provide a barrier to protect dentin from fluids and residual reactants of the restoration
They contribute to the initial electrical insulation, generate thermal proteciton, and provide pulp Tx
What are the different types of Liners?
Name = Copal Varnish
Name = CaOH2
Trade name = Dycal
Name = GI
Trade name = KetacCem
Name = ZOE and B&T
Trade name = ZOE and B&T
Provides thermal protection and to supplement mechanical support for the restoration by distributing local stresses from the restoration across the underlying dentinal surface
Provides thermal protection of pulp
Provides mechanical retention for the restoration
What is considered 'Mild caries'?
Remaining Dentin Thickness >2.0mm
How do we treat Mild caries?
Line with copal varnish and fill with Amalgam
What are the different types of Bases?
ZOE reinforced cement
RMGI (most common)
What is considered 'Moderate Caries'?
0.5-2.0 Root dentin thickness
Ideal prep does not remove all caries
How do we treat Moderate Caries?
Extend prep laterally until DEJ is noncarious
Remove carious dentin
Line with copal adhesive and fill with amalgam
Wha is considered Severe Caries?