Quiz 2/9 Restoration of the Endodontically Treated Tooth

Question 1

Leads to higher occurence of fractures in endo teeth compard to vital:

Answer 1

loss of structural integrity asoc with access prep, ie caries, existing restos

Question 2

When to consider retreatment?

Answer 2

root canal space is grossly contaminated

Question 3

Factors involved in longevity of resto after endo:

Answer 3

coronal leakage, recurrent caris, fractures, cuspal coverage, post type

Question 4

Types of posts:

Answer 4

direct, indirect, tapered, parallel, textured, smooth, threaded, unthreaded

Question 5

Factors to think about before restoration:

Answer 5

good apical seal, no sensitivity to pressure, no exudates, no apical sensitivity, no active inflammation

Question 6

3 causes of loss of tooth structure:

Answer 6

caries, endo, previous restos

Question 7

Foundation materials:

Answer 7

composite, amalgam

Question 8

Cast post and core materials:

Answer 8

metal, ceramic

Question 9

Prefab p/C materials:

Answer 9

metal, carbon files, glass fiber, ceramic post

Question 10

4 foundation resto materials:

Answer 10

composite restoration, cast post, prefab post and malgam in distal canal, prefab post and amalgam in palatal canal

Question 11

TF? Cemented posts are ideal for anteriors:

Answer 11

F. weaken, not reinforce

Question 12

Do all endo treated anteriors require full coverage restos?

Answer 12

no

Question 13

Posts not recommeded for anterior:

Answer 13

cemented, metal if itsnot ful coverage

Question 14

A crown is needed after anterior endo when:

Answer 14

extensive loos of structure, serves as an FDP and RDP abutment

Question 15

TF? Better prognosis for endo treated anteriors restored with a post.

Answer 15

F

Question 16

Endo treated anteriors not crowned after obturation are lost __ times more freq than thoes crowned.

Answer 16

6

Question 17

Endo treated posteriors req:

Answer 17

cuspal coverage (except maybe man premolars)

Question 18

Posterior tooth that may not req cuspal coverage after endo:

Answer 18

man premolar

Question 19

complete coverage crowns are recommended on these posterior teeth:

Answer 19

teeth w high risk of fracture (Max premolars)

Question 20

Recommendation for posterior teeth w sig coronal tooth loss:

Answer 20

cast P/C or prefab post along with resin/amalgam foundation resto

Question 21

posterior tooth w high risk of fracture:

Answer 21

max premolar

Question 22

Function of post:

Answer 22

retain core in tooth w extensive loss of coronal tooth structure

Question 23

Compicatons related to p/c

Answer 23

perforation root fracture,. placement beyond apex

Question 24

Principles of canal prep:

Answer 24

apical seal, min enlargement, adequate post length, pos hor stop, vert antirotational slot, extension of final resto margin onto sound tooth

Question 25

What to think about in regards to coronal tooth structure for p/c crown:

Answer 25

maximal coronal structure, enough ferrul (ortho, crown lengthening)

Question 26

More likely to result in root fracture, short or long posts?

Answer 26

short

Question 27

Post best for retentio:

Answer 27

parallel is better than tapered

Question 28

Post should be this long:

Answer 28

L of clinical crown, 3/4 L of root, 1/2 L of canal, 1/2 L of root in bone

Question 29

Keep this much GP in apex of canal:

Answer 29

3-5mm

Question 30

TF? The larger the post diameter, the better the retention.

Answer 30

F

Question 31

Post diameter should not exceed:

Answer 31

1/3 of xs diameter of root

Question 32

Goal of post diameter:

Answer 32

retain as much dentin as possible

Question 33

Ideal post surface texture:

Answer 33

serrated or roughened > smoth

Question 34

Luting agents most to least effective:

Answer 34

adhesive resin cement > ZOP/ GI cement > poly carboxylate

Question 35

Post is not necessary if:

Answer 35

there is more than 3-4mm of coronal tooth structure w reasnable wall thickness (Is this molars only?)

Question 36

When to use an amalgam post:

Answer 36

mostly pos, enough remaining coronal tooth structure w a circumferential cervical tooth structure

Question 37

Which root to use for cemented post (only this type) multirooted teeth:

Answer 37

widest canal

Question 38

Place post in this canal for man molars:

Answer 38

distal

Question 39

Place post in this canal for max molars:

Answer 39

palatal

Question 40

Where is the greatest stress distribution found in the post?

Answer 40

the shoulder, esp interproximaly and at the apex

Question 41

Are stresses red as the post shortens or lengthens?

Answer 41

lengthened

Question 42

Which distribute stress more evenly, parallel or tapered?

Answer 42

parallel

Question 43

Type of post that generateds the highest amt of stress at apex:

Answer 43

parallel

Question 44

Posts that distribute stress well:

Answer 44

threaded

Question 45

Issue w threaded posts:

Answer 45

can produce high stress conc during insertion and loading

Question 46

Function of cement:

Answer 46

more even stress distribution to root w less stress conc

Question 47

Where to place antirotational groove:

Answer 47

bulkiest root

Question 48

Don't use this type of instrument to remove GP:

Answer 48

end cutting

Question 49

Instruments to use to remove GP

Answer 49

hot ndo plugger (system B), GG drill (rotary)

Question 50

System B is:

Answer 50

hot endo plugger

Question 51

How large to maket he canal when using a prefab post:

Answer 51

1-2 sizes larger than MAF

Question 52

Be aware of this when using a custom post:

Answer 52

UC's, peroration (non-circular xs)

Question 53

Coronal walls should be this wide:

Answer 53

at least 1mm

Question 54

Create these in your coronal prep:

Answer 54

pos vertical stop and intirotational groove

Question 55

Remove this from crown:

Answer 55

internal and external UC's, unsupported tooth structure

Question 56

Post type easiest to treat:

Answer 56

Fiber

Question 57

Stronger, ceramic and zirconia OR metal?

Answer 57

metal

Question 58

Which should be thicker, ceramic and zirconia OR metal?

Answer 58

ceramic and zirconia

Question 59

Metal posts:

Answer 59

high modulus of elasticity, rigid alloy, electrolytic action of dissimilar metals

Question 60

Fiber posts:

Answer 60

easier to retreat, less strength, stiffness, lower fracture threshold

Question 61

When to use custom made posts:

Answer 61

misaligned teeth, mandibular incisors

Question 62

Direct procedure for custom post:

Answer 62

acrylic or thermoplastic resin, no binding pattern

Question 63

Indirect procedure for custom post:

Answer 63

impression/ cast

Question 64

Resto materials that can be used for prefab post:

Answer 64

amalgam, GI, resin

Question 65

Adv's of prefab post:

Answer 65

max conservation of tooth bc UC's don't need to be removed, Tx rew 1 fewer pt visit, fewere lab procedures, good resistance to fatigue test and good strength characterisitcs

Question 66

Disadv's to prefabricated posts:

Answer 66

amalgam corrosion, microleakage of composite, hard to place rubber dam and matrix if min tooth remains

Question 67

When are custom cast P/C preferred?

Answer 67

wnen most tooth structure is lost

Question 68

Procedures for core fabrication w custom P/C:

Answer 68

direct and indirect pattern

Question 69

TF? The reline material must extend all the way down the post space.

Answer 69

F

Question 70

how does the wire enhance resistance of the provisional?

Answer 70

by engaging the apical portion oft he post sapce

Question 71

Part of interim resto for apical to cornonal:

Answer 71

reinforcing wire, autoploymerizing resin, preformed crown

Question 72

Do we etch the canal before placing resin when making a provisional after an endo tx?

Answer 72

ask/ check ?

Question 73

How to fill post space canals completely w cement:

Answer 73

lentulo rotary paste fillers or a cement tube

Question 74

Steps to cementing post:

Answer 74

coat post, inject into canal, gently seat

Question 75

Why don't we care if there is a small cement line?

Answer 75

bc dissolution is prevent by the presence of the definitive resto

Question 76

How to remove existing post:

Answer 76

forceps, ultrasonic, post puller, trephines

Question 77

When woudl you need to remove a post?

Answer 77

to retreat, incompletely seated post