Lec 1/12 Prep for partial FDP

Question 1

Consequence of tooth loss:

Answer 1

teeth drift M or D, supraeruption of opposing tooth, premature contact created during protrusive moves

Question 2

4 choices to replace missing tooth/teeth”

Answer 2

implant supported resto, partial FDP, removable partial denture, resin bonded FDP

Question 3

abutment:

Answer 3

tooth or portion of tooth of portion of implant that supports prosthesis

Question 4

Retainer:

Answer 4

device used to stabilize or aide in retention of prosthesis (part of FDP cemented or luted ot the abutment)

Question 5

Pontic:

Answer 5

artificial tooth on FDP, replaces tooth, fills space filled by clinical crown, restores function

Question 6

Connector:

Answer 6

unites pontic and retainere

Question 7

Abutment preparation:

Answer 7

clinical crown portion that has been prepped

Question 8

abutment:

Answer 8

all parts below clinical crown of abutment tooth

Question 9

Only material option for sanitary pontic:

Answer 9

all metal

Question 10

sanitary pontic is indicated here:

Answer 10

posterior mandible, good access for OH, poor esthetics

Question 11

Saddle-ridge lap pontic design is indicated here:

Answer 11

NEVER

Question 12

Conical pontic design is indicated here:

Answer 12

molara wo esthetic requirement, good access for OH, poor esthetics

Question 13

When not to use conical pontic:

Answer 13

pt has POH

Question 14

Materials that conical pontic can come in:

Answer 14

all-metal, metal-ceramic, all-resin

Question 15

Indications for modified ridge lap pontic design:

Answer 15

High esthetic req, ant teeth, premolars, max molars

Question 16

modified ridge lap pontic design, ease of cleanliness:

Answer 16

moderate

Question 17

Materials that modified ridge lap pontics can use:

Answer 17

metal-ceramic, all resin, all ceramic

Question 18

Indications of ovate pontic:

Answer 18

very high esthetic need, max incisors, canines, and premolars

Question 19

Adv of ovate pontic:

Answer 19

esthetics, little food entrapment, easy to clean

Question 20

Disadv of ovate pontic:

Answer 20

req surgical prep, not for residual ridge defects

Question 21

Pontic design to use for high smile line:

Answer 21

ovate

Question 22

When you can’t use ovate pontic:

Answer 22

pt doesn’t want surgery, residual ridge defects

Question 23

materials for ovate pontic:

Answer 23

metal ceramic, all resin, all ceramic

Question 24

Pre-op considerations for partial FDP:

Answer 24

retainer selection (abutment selection), retention and resistance, POI

Question 25

Define POI:

Answer 25

direction bridge will follow from initial contact to its final seat

Question 26

Selection of abutment teeth for partial FDP:

Answer 26

abutment teeth must have adequate ferrule, good perio status, root in bone, root form, and C-R ratio, tilted teeth may need to be uprighted prior to FDP fabrication, based on Antes Law, root surface of abutment teeth must be equal to or more than that of the teeth being replaced

Question 27

TF? A retainer for an FDP require the same amt of retention and resistance as a single crown.

Answer 27

F. req greater

Question 28

What does ret and res of FDP depend upon?

Answer 28

ret and res form of the individual abutment preps

Question 29

Most important operator controlled factor in determining whether the resto stay cemented properly:

Answer 29

geometric form

Question 30

Groove can be added to these prep surfaces to inc ret and res:

Answer 30

B, L, M, D (check, is there a prefered placement of these in different circumstances?)

Question 31

When to decide POI:

Answer 31

prior to cutting tooth structure!!!

Question 32

How to check POI extraorally:

Answer 32

cast on surveyor

Question 33

Tooth to prepare first when prepping an FDP:

Answer 33

tooth presenting greatest challenge or that w the least amt of tooth structure

Question 34

design we will be doing for our partial FDP 18-20:

Answer 34

18: CCC, 19: conical pontic, 20: MCC w B porcelain margin, L metal margin, and B porcelain veneer design

Question 35

Pour models to be used for surveying up with this:

Answer 35

snap stone

Question 36

TF? Diagnosis is done before the mounting of diagnostic casts.

Answer 36

F. AFTER, same w prognosis

Question 37

Procedures to complete before prosth tx, in order:

Answer 37

perio disease, restorative, endo, ortho, OS

Question 38

TF? You always have to wax up abutment teeth along w the pontic.

Answer 38

F. only if you need to change the long axis or occlusal scheme of abutment teeth (most req wax up of abutment teeth

Question 39

Technique used to fabricate interim FDP:

Answer 39

indirect-direct (either clear matrix or silicon ESF)

Question 40

What to do after the preparation of abutment teeth:

Answer 40

take interocclusal record

Question 41

How to make final impression for FDP:

Answer 41

custom tray

Question 42

Steps after taking final impression and interocclusal record for the fabrication of a 3 unit bridge:

Answer 42

pindex, trim and mount working cast, wax up FDP, sprue and invest, cement if seated properly intraorally

Question 43

How should the prepped abutment tooth be oriented in this relation to the adjacent unprepped tooth?

Answer 43

parallel to the long axis (LA)

Question 44

In which dimensions should the LA of the preps of the abutment teeth be parallel?

Answer 44

both B-L and M-D, M parallel to M, D parallel to D, etc.

Question 45

Correct taper of abutment teeth:

Answer 45

3-5mm (check!!!) impossible

Question 46

Complication if long axis of prepped tooth and adjacent tooth converge occlusally in M-D plane:

Answer 46

access to finish line blocked