Endo Flashcards
which teeth do you perform pulp eval on?
a. tooth only
b. tooth and neighboring teeth
c. tooth, neighboring teeth, contralateral tooth
d. tooth, neighboring teeth, opposing tooth
c. tooth, neighboring teeth, contralateral tooth
fact: primary tooth got necrosis, and the inflammation went down through furcation and
affects permanent tooth. What is it gonna cause to permanent tooth? Can disturb ameloblastic
layer of permenant successor or spread infection
fact: primary tooth got necrosis, and the inflammation went down through furcation and
affects permanent tooth. What is it gonna cause to permanent tooth? Can disturb ameloblastic
layer of permenant successor or spread infection
Most common medication for pulpectomy/pulpotomy?
FORMOCRESOL
fact: calcium hydroxide is contraindicated in pulpotomy in a child because it causes
irritation leading to resorption in primary teeth
fact: calcium hydroxide is contraindicated in pulpotomy in a child because it causes
irritation leading to resorption in primary teeth
fact: Which is incorrect? Do EPT for traumatic tooth
fact: Which is incorrect? Do EPT for traumatic tooth
Least reliable test on primary teeth
• Electric pulp test
• Percussion
EPT
If you have pain, what would be the hardest to anesthetize?
a. Irreversible pulpitis and maxillary
b. Irreversible pulpitis and mandibular
c. Necrotic pulp and maxillary
d. Necrotic pulp and mandibular
b. Irreversible pulpitis and mandibular
pulpal pain that only occur at night with no stimulation
pulpal necrosis
A 7-year-old patient fractured the right central incisor three hours ago. A clinical examination reveals a 2-mm exposure of a “bleeding pulp.” The treatment-of-choice is
A. pulpectomy and apexification.
B. pulpotomy with calcium hydroxide.
C. direct pulp cap with calcium hydroxide.
D. one-appointment root canal treatment.
B. pulpotomy with calcium hydroxide
apexification vs apexogenesis
apexification: nonvital w/ incomplete apex
apexogenesis: vital w/ open apex
PEriapical lesion biopsied after apicoectomy of RCT treated tooth, tooth still sensitive tooth, with neutrophils, plasma cells, nonkeratanized stratified epithelieum (islands of), and fibrous connective tissue:
abcess? granuloma? cyst?
granuloma
Patient (6 yo), the treatment of choice for a necrotic pulp on permanent first molar would be:
- Apexification
- Apexogenesis,
- Root Canal Treatment
apexification
Reason for failure of replantation of avulsed tooth:
external resorption or internal
resorption?
external
Before 15 min what is success rate of avulsed tooth? ___ percent success rate.
by 30 min, success rate decreases to ___%
90%
50%
Splinting avulsed teeth – for how many days?
7-10 days
(mosby)
Root fracture (apical 1/3-mid): 4 wks Root fracture (cervical): 4 months
sublux: 2 wks
avulsed: 2 wks
lateral lux: 4 wks
intrusion: 4 wks
(AAE)
If tooth has open apex, and it gets avulsed, how you close it? You use____
MTA
T/F: CaOH for an avulsed tooth?
F
Intrusive trauma pulp necrosis, what percent is rate of pulp necrosis? ___%
96
Primary purpose of sodium hypochlorite?
dissolved Organic tissue (dissolve nectrotic tissue)
fact: Sodium hypochlorite is used for everything except? Chelation
fact: Sodium hypochlorite is used for everything except? Chelation
which is a chelator for endo?
EDTA
EDTA is chelator, removes SMEAR LAYER and inorganic material
EDTA: **Percentage of EDTA
17%
What causes Pink Tooth Mummery?
Mummery?
Trauma? infection? internal resorption?
internal resorption
when a tooth is ankylosed what type of resorption :
replacement resorption
The treatment-of-choice for an external inflammatory root resorption on a non-vital tooth is which of the following?
A. Extraction
B. Surgical curettage of the affected tissue
C. Pulpectomy and obturation with gutta-percha and sealer
D. Removal of the necrotic pulp and placement of calcium hydroxide
E.Observation since it is a self-limiting process
D. Removal of the necrotic pulp and placement of calcium hydroxide
when a reinplanted tooth presents external resorption what is the Tx :
a) RCT with gutta percha
b) obturation with CaOH
c) extraction
obturation with CaOH
which has the best prognosis
- perforation in extneral resorption
- perforation in internal resorption
- extruded gutta percha
• perforation in internal resorption
least likely to result in endo failure?
overfilling with gutta percha, inadequate either obturation or cleaning and shaping, lateral root resorption, perforating
internal resorption
perforating
internal resorption
cause of grey tooth
- blood products in the dentinal tubules
- internal resorption
- external resorption
- calcified canal
• blood products in the dentinal tubules
Most common cell in necrotic pulp?
PMN
Most common cause of RCT failure?
2nd most common cause of RCT failure?
1st: inadequate disinfected RC
2nd: poorly filled canals
Incomplete removal of bacteria, pulp debris, and dentinal shavings is commonly caused
by failure to irrigate thoroughly. Another reason is failure to:
A. use broaches.
B. use a chelating agent.
C. obtain a straight line access.
D. use Gates-Glidden burs.
C. Obtain a straight line access
least likely cause for failed RCT
a. GP beyond apex
b. clean & shaping no good
c. obturation no good
a. GP beyond apex-
causes of failure 1) insufficient canal debridement 2) insufficient
obuturation/leakage.
fact: Gutta percha, all except – adapts to tooth (needs sealer)
fact: Gutta percha, all except – adapts to tooth (needs sealer)
Vertical root fractures are also called cracked teeth. The prognosis of cracked teeth varies
with extent and depth of crack
TT
FF
TF
FT
FT
most common tooth associated w/ cracked tooth syndrome
Mandibular second molars,
followed by mandibular first molars and maxillary premolars
endo access design mandibular molar is
Trapz
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 crown
help expose pulp horn
How do you differentiate between an endo/perio lesion?
ept
What is untrue about EPT?
It is more reliable than cold testing for necrotic teeth
It gives relative health status of pulp
Tells if there are vital nerve fibers
It is more reliable than cold testing for necrotic teeth
lateral periodontal abscess is best differentiated from the acute apical abscess by?
a-pulp testing
b.radiographic appearance
c.probing patterns
a-pulp testing
What is test to diagnose acute periradicular periodontitis
sensitive to percussion
radiographically the acute apical abscess
a. is generally of larger size than other lesions
b. may not be evident
c. has more diffuse margins than other lesion
b.may not be evident
How do u test a tooth to differentiate between chronic perio and supperative perio?
a. cold test
b. percussion
c. EPT
b. percussion
Which of the following conditions indicates that a periodontal, rather than an
endodontic problem, exists?
A. Acute pain to percussion with no swelling
B. Pain to lateral percussion with a wide sulcular pocket
C. A deep narrow sulcular pocket to the apex with exudate
D. Pain to palpation of the buccal mucosa near the tooth ape
B. Pain to lateral percussion with a wide sulcular pocket
What treatment is required with tooth with draining sinus tract has been treated via RCT:
no further treatment
when do you puncture? An abcess.
Localized chronic fluctuant in palpation.
Localized chronic hard in palpation
Localized chronic fluctuant in palpation.
patient has a non vital tooth and a fistula is draining around gingival sulcus. What to do endo and perio at same time perio and then endo only endo only perio
endo only
There usually is no lesion apparent radiographically in acute apical periodontitis. However,
histologically bone destruction has been noted.
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.
TT
A periradicular radiolucent lesion of endodontic origin on the radiograph may be any of these
histological diagnoses except one. Mark this exception.
a. A cyst
b. A granuloma
c. An Abscess
d. Dentigerous cyst
d. Dentigerous cyst
What complete endodontic diagnosis could be completely asymptomatic but should require
endodontic therapy?
a. Pulpal necrosis and acute periradicular periodontitis
b. Normal pulp and acute periradicular periodontitis.
c. Pulpal necrosis and chronic periradicular periodontitis.
d. Normal pulp and normal periapex
c. Pulpal necrosis and chronic periradicular periodontitis.
First thing do with periapical abscess?
Incise and drain,
Use gutta percha to find it
What will not regenerate after RCT
dentin
maxillary central incisor of an adult patient is traumatized in an accident. The tooth is
slightly tender to percussion, is in good alignment, and responds normally to pulp vitality tests.
Radiographic examination shows a horizontal fracture of the apical third of the root. The best treatment is
which of the following?
A. Root canal treatment
B. Splint and re-evaluate the tooth for pulpal vitality at a later time
C. Apexification
B. Splint and re-evaluate the tooth for pulpal vitality at a later time
Fracture at apical 1/3, how long do you splint?
6-12 wks
Root fracture (apical 1/3-mid): 4 wks Root fracture (cervical): 4 months
sublux: 2 wks
avulsed: 2 wks
lateral lux: 4 wks
intrusion: 4 wks
(AAE)
urodontism has enlarged pulp chamber in which direction?
apical,
occlusal
apical AND occlusal
apical
