Dr Moretzky, religning and rebasing denture

Question 1

Define relining in dentures

Answer 1

resurfaceing the tissue side of the denture. This is done by adding new base material to the existing denture

Question 2

when is relining apropriate?

Answer 2

when there is space between the denture and the oral tissue.

Question 3

Define rebaseing in dentures

Answer 3

replacing entire denture base, This is done by flasking and heat cured acrylic

Question 4

what is pivoting and how do you fix it?

Answer 4

a bony structure is more elevated than others and the denture sits on it. Use PIP paste ( pressure indicating paste) to determine where the pivots are

Question 5

what are occlusal interferences and how are they fixed?

Answer 5

anything on the occlussal surface that prevents good occlusion. Use articulating paper.

Question 6

inadequate posterior palatal seal

Answer 6

causes looseness.

Question 7

Coronoid interferences

Answer 7

cause looseness from side to side movements. PIP paste works for this as well.

Question 8

flanges overextentions

Answer 8

cause loosenss. This is determined by pulling on the patients cheeks, lips and have them move their tongue.

Question 9

Tight pterygomandibular raphe

Answer 9

also dosne allow the denture to be stable.

Question 10

what does relining solve?

Answer 10

retention problems related to the denture base

Question 11

name the 5 types of relines

Answer 11

processed/chairside, impression/ functional technique, hard acrylic, permanent/ temporary, complete or partial dentures.

Question 12

during a processed acrylic complete reline, which impression is made first?

Answer 12

the least stable denture. This is cause is easier to stableize the some what stable other denture

Question 13

the impression technique is difficult to reline without what?

Answer 13

encroaching on interocclusasal space, displacing supporting tissue, altering occlusal contacts

Question 14

before you take the impression what do you do?

Answer 14

adjust occlusion and clean the denture, cut flanges 2 mm and border mold, then reduce tissue base

Question 15

after loading the denture with impression material, how do you place the denture?

Answer 15

place it anteriorly to posterioly

Question 16

after all this what do you do?

Answer 16

check intra oral relationships and send to lab for same day processing if possible.

Question 17

what are some advantages to the reline impression technique?

Answer 17

only 2 apts needed, tissues are captured at rest ( less possible distortion), greater extension of peripheries, allows placement of functional posterior palatal seal

Question 18

disadvantages to impression technique for relining

Answer 18

possible alteration of VDO, occlusion, facial support, . No chance to test retention under function.

Question 19

functional relines

Answer 19

It needs to be thick for to be accurate. The denture usually needs to be reduced to allow for thickness.

Question 20

how do you mix the materials for functional relines?

Answer 20

10ml powder: 2 ml liquid, mix 30 sec.

Question 21

whats lynal?

Answer 21

material used in functional relines

Question 22

how is the lynal placed in functional relines?

Answer 22

intraorally, During setting which is 8 min. let them talk, swallow, and lightly occlude.

Question 23

After setting, how do you remove excess from the denture ?

Answer 23

with a hot scalpal

Question 24

what are advangates to functional impression?

Answer 24

functionally molds peripheries, you can asses the patients comfor and retention prior to reline proper

Question 25

disadvantages to functional impressions

Answer 25

variability of materials and handling them, over extentions may occur which can irritate patients when converted to acrylic resin

Question 26

when rebasing, what are you objectives?

Answer 26

reestablish correct relation of denture to basal tissue, restore maxillomandibular relationship, restore stability and retention.

Question 27

what techniques are used for rebasing?

Answer 27

either the static impression technique, or the functional impression technique

Question 28

tissue preparation for rebasing

Answer 28

patient should leave dentures out at least 8 hours a day. Denture should not be worn 2-3 days before FINAL impression. Patients should massage tissue 2-3 times a day to stimulate blood supply.

Question 29

using tissue conditioner in rebasing

Answer 29

Is used when tissue is abused and dentures cant be left out for recovery.

Question 30

what does the conditioners do?

Answer 30

it equalizes the masticatory forces which eliminates pressure spots.

Question 31

how often are conditioners renewed?

Answer 31

every 3-7 days, once tissue is healthy they are scheduled for final impression.

Question 32

what are compound stops?

Answer 32

placed on impression surface of denture to re establish proper VD or improve occlusal plane orientation if needed.

Question 33

after placing conditioning material on the denture what is done?

Answer 33

patients mandible is in retruded position to stabilize the denture while setting.

Question 34

after making the impression what happens?

Answer 34

patient wears the denture from 4-24 hours and returns for reevaluation of the impression. If good, the impression is boxed and sent to the lab with a cast for processing