Restoration Of Endodontically Treated Teeth Flashcards
Most commonly affected teeth with cusp fracture with MOD cavities
Maxillary premolars
Most commonly extracted teeth due to vertical fracture are
Maxillary second molar
Fracture resistance of endodontically treated tooth depends on
Amount if remaining healthy dentin
The minimum sound tooth structure height between core and crown margin
Ferrule of 1.5 to 2 mm
When inadequate ferrule
Wedge effect causing post or root fracture
Post requirements for premolars
Maxillary premolars: usually require posts
Mandibular premolars: receive more vertical and less shearing force
Post preparation diameter
One third root width or less
Minimum 4-5 mm gutta percha remaining
Active vs passive posts
Threaded more retentive but not indicated because of risk of root fracture
Passive recommended for all cases
Parallel vs tapered posts
Parallel more retentive, even stress distribution
Taper less removal of tooth structure, less retentive, wedging effect and root fracture
Advantage of fiber reinforced posts
Good bond to composite
Elastic modulus similar to dentin so lower stress concentration
