Operative II Flashcards
After caries risk, describe the 3 Phases of Treatment Prioritization:
Phase I: Emergency infection, pt discomfort, prevention, gingival health, and sealants
Phase II: Simple restorations
Phase III: Complex restorations
What are the 7 Orderly Steps to the approach to restoring Individual Teeth?
Outline form
Retention form
Resistance form
Convenience form
Removal of remaining carious dentin
Finish enamel walls/cavosurfaces
Cleanse preparation
Opposing teeth often hit a _______, an area with a lot of function.
Marginal Ridge
any ridge, really
What is the junction between an unprepared tooth (normal tooth) and prepped tooth?
Cavo-surface
T/F
A line angle is between 2 walls/floors and a Point Angle is between any 3 walls/floor.
True
Pits and fissures of occlusal surfaces on Posterior Teeth are ______ cavity preparations.
Class I
What class are pits in the occlusal 2/3 of facial and lingual surfaces of molars?
Class I
The lingual pits of maxillary incisors in the top 2/3 of the tooth are considered what class?
Class I
The proximal surfaces of posterior teeth (premolars and molars) are what class of prep?
Class II
The proximal surfaces of anterior teeth not involving the icisal edge are what class of prep?
Class III
The proximal surfaces of anterior teeth involving the incisal edge is what class of prep?
Class IV
The surfaces of all teeth in the gingival 1/3 of facial and lingual surfaces are what class of prep?
Class V
The incisal edge of anterior teeth and occlusal cusp tips of posterior teeth are what class of prep?
Class VI
What is the diameter of an explorer?
1mm in 0.5 mm wide
Round bur #’s:
Inverted cone #:
Egg #:
Needle #:
Round: 1/4, 1/2
Inverted Cone: 33
Egg: 379
Needle: 135
Straight bur #’s:
Pear #’s:
Tapered #:
End cutting #:
56, 57
330, 244, 245
169
956
Enamel is ___% inorganic, 3% water, and ___% organic
Dentin is ____% inorganic, 20% water, and ___% organic.
96, 1
75, 5
Dentin is ___ times softer than Enamel
5
T/F
In the pain response, neuropeptides are released and vasodilation occurs, following by Odontoblastic swelling and closing of the Dentinal Tubule. From here, minor fluid changes distend odontoblasts and create pain.
True
T/F
Pulp is made up of mostly pain fibers
True
Name 4 causes of Pulpal Inflammation.
Dessication (drying)
Heat (bur friction)
Osmotic changes (sweets)
Bacterial (endotoxin, invasion, etc)
Drilling depths closer than ___ mm affect the pulp more severely.
2 mm
Where are dentinal tubules smallest?
Largest?
DEJ
Pulp
T/F
Coolants are mandatory for Diamond Burs
True
*abrade, cause subsurface cracks