ENDO Flashcards
Pulp contains:
lymphatic, nerves, loose fiborus CT
Firboblasts
Odontoblasts
undiff mesenchymal
T/F. Pulp has collateral circulation
FALSE.
dose not
Access prep for molar (max)
blunted triangle or rhomboid
T/F. Secondary odotoblasts secrete secondary dentin
FALSE. Secrete tertiary dentin to protect the pulp form injury
_____ = calcification of denitn tubules in response to slow adv caries /aging
sclerotic denitn
_____ dentin is made in response to minor damage
Reactionary (secondary) Dentin
Histologic zones of pulp (5) outter most to inner most
predentin ( non-mineralized layer b/w dentin and pulp)
odontoblastic layer ( nuclie - odont laying down dentin)
cell-free zone of Weil ( nerve bundles)
cell rich zone ( nuclei)
Pulp core
T/F. CaOH is used as a liner in pulp caps to irritate the odontoblasts to make reatctionary/reparitve dentint
TRUE
Size : color 10 15 25 30 35 40
10 - purople 15- white 25 - red 30 green 35 - blue 40- black
Tooth has been traumatized . Exam shows tooth displaced palatally
Lateral Luxation
alveolar fx
tx: Open apex = reposition, flexible splint, monitor
closed apex = repostion, flexible splint , RCT if necc
80% of necrosis with closed apex
the orifice location of the fourth canal common to tooth #3
Palatal to the orifice of the mesiobuccal canal
How long after endo therpay shld you see healing
6-12 mo
A clinician can expect bone to be redeposited in the apical area after RCT- when the lesion is healed, osteoblasts form a collagen matrix. Calcification of the collagen matrix typically occurs within 6-12 mo
The rule of thumb for post preparation is
that you prepare the canals so that ½ of the root has gutta percha remaining (or about 5 mm+)
Posts typically weaken the tooth because the removal of dentin causes stress and further thins the walls of the root, predisposing the root to fracture.
T/F. Teeth with sinus tracts do NOT require antibiotics because the infection drains.
TRUE.
The tooth should be treated with a RCT.
The sinus tract should heal w/i a month of the RCT. Root-end surgery should be performed if the tract persists after the RCT.
______ determines vitality of tooth
vascular supply
___1__ is CI in testing pulp with patients with __2__.
- EPT
2. Cardica pacer
spontaneous pain ; intermittent ; lingering
Irreversible pulpits
_____ is an irrigant and dissolves organic material
NaOCl ; bleach
organic ( bacteria)
____ is used to open orifice for straigh-line acess
Gates-glidden
Bacteria involved when an endo treatment FAILS
Enterococcus Faecalis
(repopulated with bac )
gram + facultative bac
_____ is the reduces threshold of pain , pain d/t stimulus that does not normally produce pain
Allodynia
Preaucricular pain is most commonly refered from?
Mand molar ( V3)
_____ is the heightened response to pain
Hyperalgesia
Dentin Pain nerves
A- delta fibers and C fibers
AD (large myleinated ; afferent- carrying form periph to center ; first sharp pain ; course coronally COLD)
Pulpitis Pain nerves
C fibers
C: small unmylinated ; course centrally in pulp ; ; dull throbbing second pain ; HEAT
Dicholordifloromethane =
Endo ICE for pulpal diagnosis
-30 C to DRY middle third of facial
EPT is the _____ test
Least reliable test ; doesnt give dx of pulp
tells if there are Vital sensory FIBERS
____ is made in response to major damage to dentin
Reparative (tertiary) dentin
____ dissolves Gutta percha
Cholorofrom
No pain on percussion or palpation
Normal Periapical Periodontitis
*main dx tools for periapical dx
Apical radiolucency ; asymptomaitc to percussion/palpation
Asymptomatic periapical Periodontitis
- confrimatin of pulpal necrosis*
painful percussion ; intense throbbing pain
symptomatic periapical Periodontitis
endo therapy necc
caused by localized inflamm infiltrate w/i PDL
Tx for root perforation
STOP. Repair with MTA .
s/s - immediate hemorrhage ; pain ( may not be numb at that part of the PDL)
the more apical has better prognosis
Pain w/ stimulus ; wears off ; quick sharp hypersensative
Reversible pulpitis
Danger zone
distal of mesial root of mand molar
easy to perforate ( less dentin ; mesial has more dentin)
Truama protpcol
Tetanus (avulsions) Radiogrpahs Abx (avulsions) Vitality testin More Appts ( following up)
Draining sinus tract , usually with pain/discomfort
Chronic Apical Abscess
Shape of H-file
sprial cone * teardrop cr sxn*
only cuts in retraction
Access prep for canine
oval/oviod
Which pm most likely to have two roots (canals)
Max 1st PM
hand files made from
Stainless steel
K-kerr- File
H-Hedstrom
- 02 taper in K
- 04-0.06 in H
A 0.02 taper indicates an increase of 0.02 mm in diameter per 1 mm of file length.
Access prep for pms
narrow oval
Rapid swelling, severe pain, purulent exudate around apex
Acute apical Abscess
Access prep for molar (mand)
trapezoidal
Rotary files are made of
NiTi
0.04 or 0.06 taper
Shape of K-file
twisted square
used in watch winding motion
what is the prognosis if the file breaks later in the RCT
better
b/c the canal is more cleaned out dec bac
In periapical microsurgery how much canal shld be filled
3mm
3mm root tip removed
0-10 degree bevel
What to do if ledge created?
use smaller file to bypass ; use flexible NiTi files ( likley to fx)
(also with instrument separation)
prevention ( replace files, use EDTA
Ellis class of trauma
1 : enamel only
2: enamel and dentin
3: enamel dentin pulp
4: traumtized tooth thats now non-vital
5: luxation
6: avulsion