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Removable Pros > Relines, Rebases, Repair > Flashcards

Relines, Rebases, Repair Flashcards

1
Q

reline

A

replacement of the inner 1 mm of denture base

so replacement of the tissue surface only **

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2
Q

rebase

A

entire denture base is replaced

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3
Q

repair

A

just about anything

  • replacement of teeth
  • addition of border
  • reposition of broken denture base segments
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4
Q

what differes in reline or rebase?

A

lab steps

steps to perform both reline and rebase are the same

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5
Q

what must you decide prior to a final reline/ rebase impression

A

IF THE VDO WILL BE MAINTAINED OR INCREASED

maintain if possible

increase if the occlusion shows signs of ware and loss of vertical

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6
Q

what are signs of repair needed?

A

several - main ones

  1. replacement of teeth
  2. addition of borders - including PPS
  3. Reposition of broken denture base segments
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7
Q

after assessment of the VDO - what would indicate the need to increase VDO?

A
  1. if the occlusion is beginning to show signs of wear and loss of vertical, but still servicable
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8
Q

maximum amount you can increase VDO with rebase/reline?

A

1-2 mm is MAXIMUM

if 2mm or more is needed – need to remake the denture

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9
Q

what must be done each time border molding is added or the final impression is placed?

A

A FUNCTIONAL impression technique must be used.

this is known as CLOSED MOUTH POSITION

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10
Q

Before you ever do something to a prostheses?

A

Check occlsuion with prosthesis and without

adjust CO=CR to establish a STABLE OCCLUSION

then seat the impression for reline or rebase TO THIS OCCLUSION

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11
Q

steps for reline or rebase to MAINTAIN VDO

A
  1. Reduce the interior by 1mm to make room for the new impression material except for 3 tissue stops – that are placed at the current vdo!!
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12
Q

location of tissue stops

A
  1. anterior - but not on incisive papilla
  2. 2 in the posterior – but anterior to the tuberosities on upper or retromolar pads on lower
    * need to have sufficient room for final impression material and do not want to increase the VDO with material
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13
Q

in prep for reline or rebase what do you reduce or remove

A

REDUCE – denture border by about 2-3 mm to allow for compound border molding (think as if it as a record base and taking final impressiosn)

  1. REMOVE – any tissue conditioner or old reline material and freshen up the denture base for mechanical adhesion
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14
Q

steps for reline or rebase to INCREASE VDO

A

add grey or green tissue stops to the apprpriate vertical.
MAX of 1-2 mm

put them in same locations
1. at anterior offset of incisive papilla and

  1. two in posterior but anterior to the tuberosity on maxilla and rmp on lower
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15
Q

once establish the vertical … then what

A

reduce the borders – treat it like it is an existing custom tray and border mold FUNCTIONALLY (IN OCCLUSION) place compatible adhesive and let it cure before taking impression

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16
Q

after you border mold FUNCTIONALLY (in occlusion) then…

A

make the final impression using MUCOSTATIC impression material such as light boddied rubber base

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17
Q

CR record in reline rebase?

A

YES — after the impression is set you trim flash and re-seat in order to take CR with Auluwax to ORIENT the denture

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18
Q

what holds vertical/ VDO during reline/rebase

A
  1. articulator = pin
  2. jig = leveling screw

both flask and jig require an occlusal index

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19
Q

when reline/rebase the upper what must you do?
technique?
step after?

A

SCORE the post dam – drawn on impression because a cast does not yet exist – after separation - then we can put onto cast

this is a mechanical post dam technique and must document the tissue depths so cast can be scored AFTER FLASKING

then bead box and pour

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20
Q

when do you separate after beading and boxing?

A

AFTER FLASKING because the vertical has not yet been held!!!

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21
Q

if rebases - most of the time it will be placed where?

A

FLASK

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22
Q

importance of the land of the flask?

A

HOLDS THE VERTICAL - just like a pin does on articulator.

so the land of flask acts as a vertical stop.

23
Q

after and occlusal index is made what can be done?

A

CAN SEPARATE CAST FROM DENTURE – + impression between upper and lower can be made

24
Q

postdam cut into flask when?

A

AFTER FLASKING AND BOIL OUT

BEFORE NEW ACRYLIC IS PACKED .

25
Q

how fix broken tooth?

A

space is created on lingual for acrylic repair

tooth is luted on facial with sticky wax

SALT AND PEPPER TECHNIQUE

20 lbs psi for 20 minutes – pressure cooker

FIGURE OUT WHY BROKE

26
Q

incipient midline fracture?

A

indication for REBASE

common on the mandible

27
Q

where do you NOT widen the fracture?

where do you?

A

on intaglio

you prepare and bevel the repair site by adding horizontal barbell perpendicular to fracture on polished facial and palatal aspect

28
Q

do relines do anything for fractures?

A

NOO – only replace the inner 1 mm of denture

29
Q

what is placed in groove prior to acrylic placement?

A

pin or metal mesh reinforcement

+ pin to stabliz

30
Q

fractured denture border? likely to re-fracture?

A

replaced with COMPOUND INTRA-ORALLY
block out undercuts’ cast pored to support denture and repair site– now we have area we can add repair acrylic to

20psi for 20 minutes

UNLIKELY to refracture

31
Q

Very common fracture on mandible?

A

denture base fracture at overlay abutment site

be sure to check occlusion and proper height of abutments before addressing the repair

32
Q

denture base fracture at overlay abutment site repair technique?

A

have to temporarily repair so then have a denture we can rebase with

so reposition parts bench side and parts are splinted on temporary cast with tongue blades and sticky wax – across arch stabilization with sticky wax and heavy gauge wire

pressure cured repair at 20 psi for 20 minutes

33
Q

temporary repair cast made of?

A

dental stone or silicone putty

34
Q

overdenture repair sire liklihood of re-fracture?

A

YES – so temporary repair and then need to REBASE as a follow up DEFINITIVE TREATMENT

35
Q

post dam augmentation? how do you know?

A

NO RETENTION – add compound in posterior in shape of post dam - hear the retention

indicated when all other aspects of denture are acceptable but denture lacks retention due to insufficient post dam

36
Q

post dam augmentation steps

A

compound is added INTRA-ORALLY and FUNCTIONALLY to the post dam AND to the distobuccal areas bilaterally

repair cast created

compound removed and denture re-seated

37
Q

after repair cast is created what do you get?

A

gap between denture and repair cast so we can add the repair acrylic and psi 20 for 20 minutes

38
Q

T/F postdam augmentation and reline can be done at the same time?

A

TRUE – simultaneously

39
Q

CC of whistle?
problem?
repair?

A

Problem is maxillary teeth are set too far lingually

reset upper teeth - lower may nor require resent depending on offset/crossbite

40
Q

CC of lisp?
“so sounds like show”
problem?
repair?

A

Problem is maxillary teeth are set too far buccaly

add wax to linguals of upper denture teeth

41
Q

CC of T sounds like D or D sounds like T
problem?
repair?

A

T sounds like D = MAXILLARY ANTERIOR TEETH too lingual

D sounds like T = MAXILLARY ANTERIOR TEETH TOO LABIAL

reset upper and or lower according to everything – overlap, overjet, crest of ridge, papillas, lip support, etc.

42
Q

occlusion or not for reline/rebase.repair

A

if you need a bite or impression then yes! - sometimes repair doesnt need this so depends on whether you need to orient the prosthesis back to patients dentition

Reline = YES

Rebase = YES

Repair = +/-

43
Q

‘pick-up’ impression?

A

if need impression on a repair

an impression that incorporates a prosthesis, framework, copings. or attachemtns for the purpose of making a cast as relationship record within the arch

pouring the cast with the prosthesis still embedded in the alginate – produces a cast with a precise fit.

removes prosthesis along with impression

44
Q

length of service needed is a function of?

A

lifespan of the prosthesis

45
Q

when deciding to reline or rebase what is critical?

A

determining the length of service

46
Q

two main questions to use when determining what material to use

A
  1. what is the problem

2. how long must the solution last?

47
Q

heat cured hard reline will last how long?

A

7 years – so if pt. needs a reline and is wearing denture for 5 years don’t do this one – we would hesitate to do this – could introduce heat damage too

use pressure cooker- 1-3 years

48
Q

definitive treatment if a brand new denture fractures from a fall?

A

REBASE

repair first – to make rebase

heat cured hard rebase

49
Q

eclipse material

A

same as triad material

methylmethacrylate- free ** light cured resin for fabricating denture bases

50
Q

is vovclar / ivocap rigid? esthetic? type of material?

A

MMA injectable and is rigid and esthetic

more dense than flasking - so less free monomer

51
Q

Triad rigid? esthetic? type of material?

A

Light cured resin

it is rigid
NOT esthetic

52
Q

eclipse

rigid? esthetic? type of material?

A

Light cured resin – urethane dimethacrylate

both rigid and esthetic

53
Q

flexite

rigid? esthetic? type of material?

A

Nylon, acetyl, polyether

NOT rigid but it is esthetic – partials

54
Q

Avadent

rigid? esthetic? type of material?

A

digital dentures* uses prepolymerized puck PMA

less free monomer - situations in allergies
both rigid and esthetic

Removable Pros (20 decks)

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