QUESTION: Which teeth do vertical fractures more common?
– Lower posterior teeth.
QUESTION: What causes most vertical root fractures?
Condensation of gutta percha
QUESTION: most probability of vertical root fracture
– isolated pocket depth
QUESTION: isolated pocket . What condition?
Vertical root fracture
– Cracked toothsyndrome
QUESTION: Which one has a different transillumination?
QUESTION: which allows the enitre tooth tooth to light up under transillumination?
Again cracked tooth
QUESTION: When does transillumiator show evenly through tooth: craze line, crack, fracture
from crown to root:craze line
QUESTION: when does translumination shows the whole crown : a) fracture cusp b)
c) craze lines
TRANSILLUMINATION: shows cracks.
Whole tooth = craze line
QUESTION: Type of fracture that lets light pass completely through…
a. crazed CRAZE LINE
b. split tooth
QUESTION: Which will show up on transillumination best?
QUESTION: Which will show up on transillumination best?
Vertical root fracture
QUESTION: Vertical root fractures are also called cracked teeth. The prognosis of cracked teeth varies with extent and depth of crack.
a. Both statements are true
b. Both statements are false.
c. First statement is true, second is false.
d. First statement is false, second is true.
QUESTION: If two cavities were thought to be two separate fillings but upon exam it was a crack through the isthmus. What do we tx this symptomless crack with?
QUESTION: most common tooth associated w/ cracked tooth syndrome:
Mandibular second molars, followed by mandibular first molars and maxillary premolars, are the most commonly affected
QUESTION: Crack tooth syndrome is most likely found?
QUESTION: Most common to have cracked tooth
= mand 1st molar (mand 2nd first) MD direction
QUESTION: horiz root fracture
a. reduce & immobilize
QUESTION: How do you first tx a horizontal root fracture?
Immobilize the segments for
QUESTION: Apical horoziontal root fracture: no pain, what do you do? Rct, scaling, rct if tested nonvital, monitor 1 year
QUESTION: Horizontal Root Fracture more common in anteriors, the success and healing of horizontal root fractures is the immediate reduction of the fractured segments and the immobilization of the coronal segment 12 weeks
QUESTION: Horizontal rooth fracture: take multiple vertical angulated xrays
QUESTION: Most common teeth with crown to root fracture? Mand molars
QUESTION: which tooth is least likely to fracture: mx premolar, mx molar, md premolar, md molar
QUESTION: which tooth is most commonly fractured? mx incisors, md incisors, etc.
QUESTION: Chronic endo lesion, what type of bacteria? Anerobes ANS (multiple anerobes)
QUESTION: Reason for failed endo?
Seal 2mm away from apex
RCT sealer beyond apex
Forgot other one
QUESTION: Endo f ile breaks when you at 15 file. refer to endodontist.(retrieving it was not an
QUESTION: If file breaks tooth asx:
• Leave and monitor
QUESTION: You being the best doctor in the world, you broke a 5mm dental instrument in a
RCT procedure, what’s the best thing to do? – Tell the patient what happened, and refer her to an
endodontist. (Other choices were, take a picture and only tell patient if you see the instrument in
patient to continue with RCT, Put a watch on it)
QUESTION: Endo on a molar.
Break a file on apical level, what should you do?
-write on med history and continue?
-refer patient to specialist?- if it was in middle third you would continue treatment.
QUESTION: what file was the endodontist using?
QUESTION: What is not an advantage of NiTi over stainless steel
Ability to stay centered in canal
Something aided depth penetration into canal
QUESTION: all are advantages of using nickel titanium endo files over regular steel files
a. flexibility (yes)
b. bending memory (yes)c. direction of the flutes (no)?
QUESTION: What is the weakness of Ni files vs regular- strength, flexibility… and some other
choices ( I wrote strength)
QUESTION: What is the NOT an advantage of stainless steel files? 1. More flexible.., 2. Less
breaking, 3. Allows the file to be centered in canal,
NiTi rotary files remain better centered, produce less transportation, and instrument faster than
steel files due to their superior flexibility and resistance to torsional fracture. They have 10x the
resistances of stainless steel (stronger).
QUESTION: Which of the following is not an advantage of Ni-Ti over stainless steel file?
a. Maintains the shape of canal,
c. resistance to fracture.
QUESTION: you separate an endo file 3mm from the apex and obturate above it… which case will show the best prognosis?
a. vital pulp w/ no periapical lesion(yes)
b. vital pulp wI periapical lesion
c. necrotic pulp wI no periapical lesion
d. necrotic pulp wI periapical lesion
QUESTION: Best prognoses for a broken instrument at apical third?
Vital pulp with no PA abscess
Necrotic pulp with no PA abscess
Vital pulp with PA abscess
Necrotic pulp with PA abscess
QUESTION: which has worst prognosis? File fracture, transportation, through furcation
QUESTION: How many canals do you expect in primary M2: four
QUESTION: Access design
–mandibular is trapezoid
QUESTION: What is the shape of the access of mandibular 1st molar?
QUESTION: maxillary 1st molar access opening
QUESTION: Pulpal anatomy dictates a triangular-access cavity preparation in the MAXILLARY
QUESTION: why do you do triangular access on incisors (max central inccisor?)
a. to help with straight line access
b. help expose pulp horn
c. to follow the shape of the crownQUESTION: Ept tests whether its responsive or nonresponsive that’s it
=not tell level of necrosis/how vital the tooth
QUESTION: EPT – responsivness
Means not healthy tooth
QUESTION: How does a tooth covered with crown react to pulp testing—
cold is better test (thermal)
QUESTION: what can you diagnose with the EPT test :
QUESTION: How do you differentiate between an endo/perio lesion?
QUESTION: EPT: to differentiate if perio (some response to ept) or endo(necrotic, no response
QUESTION: Vitality test used to distinguish periodontal from endo lesion –
vitality and probing depths
QUESTION: know best way to diagnose irreversible pulpitis ?
heat. Cold/ thermal test
QUESTION: EPT is more accurate than cold test for pulp necrosis?
QUESTION: What is untrue about EPT?
It is more reliable than cold testing for necrotic teeth (false!!!)
It gives relative health status of pulp (true)
Tells if there are vital nerve fibers (true)
QUESTION: EPT does NOT indicate health of the pulp
QUESTION: EPT- compared to cold test it is superior (False)….
QUESTION: What is not true regarding electric pulp test
: Doesn’t tell you about vascular or
something like that (doesn’t tell you about vascularity of pulp which is true pulpal diagnosis)
QUESTION: Did not respond thermal and ept but response to palpation and percussion?
QUESTION: Most reliable way to test vitality of a tooth?
a final diagnosis, because EPT can have may false readings
QUESTION: Luxated tooth, negative EPT – disruption of nerves to tooth
QUESTION: Best prognosis of perio endo lesion
• Endo with rct – perform first
• Perio scaling and root planning
QUESTION: what is initial treatment of combination perio and endo lesion:
do rct first
QUESTION: Pulp vitality testing. Difference between perio and endo periapical lesions. Best
perio started from endo DONT KNOW
, or endo started from perio?QUESTION: test performed to differentiate endo vs. perio lesions
QUESTION: Percussion: can identify perio involvement
QUESTION: Difference b/w acute apical abscess and lateral periodontal abscess:
QUESTION: lateral periodontal abscess is best differentiated from the acute apical abscess by?
QUESTION: how do you distinguish acute apical absess and periodontal absess : vitality
QUESTION: differential diagnosis of periodontal abscess and periradiculal abscess?
b. vitality test
QUESTION: on primary teeth you dont want to use ept