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Boards 2 > Endo Facts > Flashcards

Endo Facts Flashcards

1
Q

dichlorodifluoromethane

A

endo ice - for cold testing

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2
Q

worst test for both pulp and perio diagnosis?

A

EPT

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3
Q

best test for pulp and perio diagnosis?

A 
pulp= cold
perio= percussion and palpation
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4
Q

most important technical aspect to RCT?

A

access prep

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5
Q

shape of accesses?

A 
anterior= triangle
canine= ovoid
PM= ovoid
MX molars= rhomboid or blunted triangle
MN molars= trapazoid
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6
Q

which PM is most likely to have two roots?

A

MX 1st PM

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7
Q

SS Hand files vs NiTi rotary files

A

SS (stainless steele)= .02 taper

    • K-file (Kerr)- square, watch winding method
  • -H-file (Hedstrom)- spiral cone, only cuts in retraction

NiTi rotary files= .04-.06 taper, latch

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8
Q

color of endo files order

A

white, yellow, red, blue, green black (WYRBGB)

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9
Q

gates gilded vs barbed broaches vs reamer intruments

A 
GG= open orifices for straight line
BB= entangle and remove
Reamer= twisted triangle
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10
Q

sodium hypochlorite (NaOCl)

A

irrigant, dissolves ORGANIC material

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11
Q

crown down vs step back cleaning&shaping

A

crown down= big to small, rotary

step back= small to big, hand

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12
Q

Ethylenediamine tetraacetic acid (EDTA)

A

chelating agent, lubricant, dissolves INORGANIC material (smear layer)

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13
Q

Microbes in primary endo infect?

A

bacteroides (G-, obligate)

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14
Q

Microbes in secondary endo infect (retreat)?

A

Enterococcus faecalis (G+, facultative)

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15
Q

trephination

A

surgical opening for hard tissue to release exudate and pressure

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16
Q

Chloroform

A

dissolves GP in retreatment

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17
Q

negotiation

A

use of smaller instruments to bypass a ledge

18
Q

periapical microsurgery facts

A
  • bevel/angle root tip 0-10 degrees
  • retrofil 3mm
  • fill with MTA
19
Q

BIG NiTi files pro and con

A 
Pro= flexible, less likely to ledge
Con= flexible, more likely to fracture
20
Q

canal transformation

A

file tries to straighten canal, makes ledge, BAD, artificial

21
Q

mineral trioxide aggreagate

A

MTA, internal repair or filling material for apical micro surgeries

  • stimulates cementoblasts to produce hard tissue
  • 3 minerals: calcium, silicon, aluminum

CONS

  • bismuth oxide= opacifier, shows on xray and can stain teeth so avoid on anteriors
  • long 3 hr setting time

PRO

  • sets in presense of moisture
  • antimicroial
  • nonresorbable so great for sealing
22
Q

TRAVMA

A 
Tetanus booster (avulsions only)
Radiographs
Antibiotics (avulsions only)
Vitality
More
Appointments
23
Q

Strip perforation

A

distal side of mesial root on MN molars due to excessive coronal flaring

24
Q

Ellis Classifications

A 
class 1= 1 layer
2= 2 layers
3= 3 layers
4= becomes non-vital
5= moves (luxation)
6= lose (avulsion)
25
Q

uncomplicated vs complicated fracture

A

uncomplicated= without pulp exposure

    • enamel- smooth
    • enamel plus dentin= restore

complicated= with pulp exposure

    • less than 24hr- DPC
    • 24hr or more- Cvek aka partial pulpotomy
    • 72+ hr -Pulpotomy (remove entire coronal pulp)
26
Q

concussion vs subluxation

A

concussion- no mobility, no bleeding, no displacement but sore PDL… let it rest

subluxation- no displacement but increased mobility, PDL is ripped and bleeding… flexible splint

27
Q

worst prognosis for an necrotic tooth?

A

intrusion with a closed apex

28
Q

avulsion vs extrusion?

A

avulsion- completely lose tooth

extrusion- partial extruded from socket

29
Q

what to do with avulsed perm tooth?

A

closed and <60min = reimplant and splint

open and <60min= same^ except apexification at first sign of infection

closed >60min= reimplant, splint, RCT

open and >60min= maybe reimplant? plan for implant

30
Q

Hank Balanced Salt Solution

A

storage media for avulsed tooth

*milk, saline and saliva work too

31
Q

external vs internal resorption

A

external

  • damaged cementoblastic layer in periodontium starts resorption
  • poorly defined margins
  • MOVES with XRAYS

internal

  • damage to odontoblastic
  • better prognosis, RCT
  • defined margins
  • does NOT move with xray
32
Q

replacement resorption

A
  • ankylosis, replaces PDL with bone

- external

33
Q

Cervical resorption

A
  • subepithelial sulcular infection from trauma or nonvital teeth bleaching
  • external
34
Q

inflammatory root resorption

A

bacteria and byproducts from necrotic pulp travel through dentinal tubules to affect periodontium

35
Q

Formocresol

A

used in pulpotomy for the fixation zone

36
Q

calcific metamorphosis

A

trauma induces odontoblasts to rapidly make reparative dentin within pulp, yellow-orange tooth and more likely with open apices

37
Q

calcium hydroxide

A

stimulates secondary odontoblasts to repair with dentinal bridge formation (aka tertiary dentin)
* HIGH pH of 12.5!!!!

38
Q

Buckley’s Formocresol made mostly of?

A

35% - cresol

19% - formaldehyde
15% - glycerine
31% - water
bactericidal + “fixative”

39
Q 
indirect pulp cap vs direct pulp cap vs
partial pulpotomy(cvek) vs pulpotomy vs pulpectomy vs RCT
A

indirect - CaOH or RGMI on thin partition of dentin

direct pulp cap - CaOH or RGMI directly on dentin

Cvek - shallow pulpotomy

pulpotomy- full removal of pulp

pulpectomy- RCT w/o gutta perch, temporary

RCT - full removal coronal and radicular pulp with gutta percha

40
Q

apexogenesis vs apexification

A

apexogenesis - vital tooth, used to maintain pulp vitality in order stimulate root development for immature perm teeth
* CaOH or MTA placed on healthy or diseased pulp

apexification - immature perm tooth is dead so you just want to seal root
* CaOH or MTA placed at base of canal after pulp removal

Boards 2 (15 decks)

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