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Remo > CH 11B: Reline, Rebase, Repairs > Flashcards

CH 11B: Reline, Rebase, Repairs Flashcards

1
Q

RELINES

A

Replacement of the inner 1mm of the denture base

tissue surface only

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2
Q

REBASES

A

Replacement of the entire denture base,

saving only the teeth

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3
Q

The lifespan of a denture ____years

A

7-10 years

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4
Q

You must decide _____ (prior/after) to final reline/rebase impression whether the VDO will be maintained or increased.

A

You must decide PRIOR to final reline/rebase impression whether the VDO will be maintained or increased.

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5
Q

In what scenario will you maintain the VDO for a reline/rebase impression?

A

Maintain if the VDO is still acceptable

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6
Q

In what scenario will you increase the VDO for a reline/rebase impression?

A

Increase if …
-the occlusion shows signs of wear
-loss of vertical
, but is still serviceable.

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7
Q

Maximum permissible increase in VDO during reline/rebase procedure

A

1-2 mm maximum

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8
Q

What will you do if you need to increase the VDO >2mm during reline/rebase procedure?

A

If >2mm increase in VDO is needed,

remake denture

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9
Q

The impression for a reline/rebase procedure is NOT seated in occlusion.
T/F

A

F
The impression for reline or rebase procudure is seated in occlusion. (Adjust CO=CR to establish a stable occlusion)

This is also known as a CLOSED MOUTH POSITION and is required.

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10
Q

The border impression for a reline/rebase procedure is Functional.
T/F

A

T

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11
Q

Preparation of the denture for Reline:

A

1) Reduce denture borders by about 2-3mm to allow for border molding material.
2) Reduce all interior acrylic by ~1.5 mm (to make room for final impression material) except for 3 tissue stops at the CURRENT VDO.
3) Remove any tissue conditioner or old reline material

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12
Q

For a Reline, reduce denture borders by about ____ to allow for border molding material.

A

2-3mm

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13
Q

For a Reline, reduce all interior acrylic by ______mm to make room for final impression material, except for 3 tissue stops at ______ (MIP, VDO)

A

~1.5 mm

the CURRENT VDO

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14
Q

Location of tissue stops:

A

NOTE: 3 tissue stops are made at the CURRENT VDO
- One in Anterior-but not on incisive papilla

  • Two in Posterior-anterior to tuberosities (U) or retromolar pads (L)
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15
Q

Steps to INCREASE VDO via a reline or rebase of a complete denture?

A
  • Add grey or green compound tissue stops to the appropriate vertical.
  • Maximum 1-2 mm.
  • 3 tissue stops are made at the CURRENT VDO
  • Once vertical has been established, next reduce borders of ‘tray’(i.e denture)
  • border mold functionally (in occlusion)
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16
Q

During reline/rebase procedure CR bite is taken with Aluwax to orient denture. T/F

A

T

CR bite with Aluwax to orient denture

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17
Q

When is the Mechanical post dam scored?

A
  • After flasking and boil out

- and before the new acrylic is packed.

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18
Q

What holds VDO in the Clinic?

A
  • Articulator

- Pin

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19
Q

What holds VDO in the lab during Jig reline?

A
  • Jig

- Levelling screw

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20
Q

What holds VDO in the lab during Flask Reline?

A
  • Flask

- Land of flask

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21
Q

To hold the VDO in the lab during reline/rebase procedure, both flask and jig require _____.

A

occlusal index

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22
Q

Without an incisal pin, or leveling screw, there is no way to maintain VDO after the impression material is removed. T/F

A

T

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23
Q

Repairs

A

Replacing teeth or portions of denture base

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24
Q

Small well circumscribed

voids with sharp margins can on the impression can be fixed with ____ (XLV wash impression /disclosing wax)

A

disclosing wax

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25
Q

Outline of Post dam for reline/rebase is drawn on _____ (cast/impression)

A

impression

because cast does not yet exist

26
Q

For reline/rebase procedure, the cast is separated/retrieved after being poured PRIOR to making the Occlusal index. T/F

A

F

DO NOT SEPARATE until occlusal
index is made

27
Q

When repairing a denture with a broken tooth, the residual portion of broken tooth is
ground away and the denture base is perforated to make space for the new (repair) tooth

A

F
-DO NOT perforate the denture base

  • Tooth is luted on facial with sticky wax
  • Space is created on lingual for repair acrylic
  • Repair acrylic using “salt and pepper” technique
28
Q

When repairing a denture with a broken tooth; the tooth is luted on facial with _____ wax

A

sticky wax

29
Q

When repairing a denture with a broken tooth, space is created on ________(buccal/lingual) aspect of the denture for repair acrylic

A

Space is created on lingual for repair acrylic

30
Q

Time and pressure for curing repair acrylic

A

20 lb psi for 20 min

31
Q

Craze line was discovered in overdenture at first denture recall. Will you recommend reline, repair or rebase?

A

Rebase

Weak repair site which is liable to re-fracture (eg. craze line, midline fracture etc) is
an indication for a Rebase

32
Q

Repair site is NOT widened on intaglio side. T/F

A

T

33
Q

How will you assess a Denture Base Fracture at Overlay Abutment Site?

A
  • check occlusion and proper height of abutments

before addressing the repair

34
Q

Denture Base Fracture at Overlay Abutment Site will need a _____ (reline/rebase) as a definitive treatment.

A

Rebase

Overdenture repair site likely to re-fracture & will
need a Rebase as a follow-up for definitive treatment

35
Q

Why are Incipient or Complete Midline Fractures first repaired?

A

We repair it in order to take a final impression for the
Rebase

Rebase as a follow-up for definitive treatment

36
Q

Pt dropped the denture and fractured the denture border. Will you recommend reline, repair or rebase?

A

Repair

Border is NOT likely to re-fracture

37
Q

Chief Concern: Whistle-pathognomonic

-Problem?

A

Maxillary teeth set too far

lingually (offset correctly with mandibular teeth)

38
Q

Chief Concern : Whistle-pathognomonic

-Repair?

A

Reset upper teeth;

lower may or may not require reset depending on offset/ crossbite

39
Q

Chief Concern: Lisp-pathognomonic
“so” sounds like “show”

-Problem?

A

Maxillary teeth set too far
buccally (offset correct with
mandibular teeth)

40
Q

Chief Concern: Lisp-pathognomonic
“so” sounds like “show”

-Repair?

A

Add wax to linguals of upper

denture teeth process

41
Q

Chief Concern: Cheek biting/ Tongue biting

-Problem?

A

Maxillary teeth and mandibular teeth set edge to edge regardless of B/L position on the ridge

42
Q

Chief Concern: Cheek biting/ Tongue biting

-Repair?

A

Reset upper or lower posteriors
as appropriate

e.g if monoplane lower set to crest of ridge, then reset monoplane upper posterior teeth with correct offset

43
Q

Chief Concern: T sounds like D

-Problem?

A

Maxillary anterior teeth too lingual

44
Q

Chief Concern: T sounds like D or D sounds like T

-Repair?

A 
Reset upper and/or lower as
appropriate incorporating all
equally critical factors (overlap,
over-jet, lower crest of ridge,
upper incisive papilla, lip
support)
45
Q

Chief Concern: D sounds like T

-Problem?

A

Maxillary anterior teeth too

labial

46
Q

“Pick-Up” Impression

A

an impression that incorporates a prosthesis, framework, copings, or attachments for the purpose of making a cast as a relationship record within the arch
(GPT v9)

47
Q

When a denture requires a reline, rebase, repair, what questions do we need to ask?

A
  1. How old is the denture?
  2. How old is the liner (if any)?
  3. Are you allergic to any (denture) materials?
  4. How did the break/damage occur?
  5. Ask about and evaluate the occlusion.
48
Q

If an IMMEDIATE DENTURE is not retentive at the insertion appointment, the material used
to increase retention is:

A

tissue conditioner (super-soft liner)

-We never use soft liners at an insertion appointment (for either an immediate or an
interim denture) only super-soft liners, because they are tissue conditioners. The soft liners are not soft enough.

49
Q

What would you do for 5 year old
denture that needs a reline if you
know the average denture lasts
about 7 years?

A
  • Type: Pressure cured (COLD) Hard
  • Where: Lab
  • Life span: ~1-3yrs
  • Since you want the denture to last for 2yrs, you want to pressure cure it. However, since the denture is 5yrs old, HEAT might degrade the denture.
  • *So, use Cold pressure cure
50
Q

What would you do if a brand new

denture fractures from a fall?

A 
Plan
Repair (splint) then rebase heat-cured hard.

Rebase* is the definitive treatment

51
Q

Length of service: 1 week
Procedure: reline

What is the consistency of the material used and the type of cure?

A
  • Consistency: super-soft

- Type of cure: self-cured

52
Q

Length of service: 1 month (4weeks)
Procedure: reline

What is the consistency of the material used and the type of cure?

A
  • Consistency: soft

- Type of cure: self-cured

53
Q

Length of service: 1 year
Procedure: soft reline

What is the consistency of the material used and the type of cure?

A
  • Consistency: soft

- Type of cure: pressure-cured

54
Q

Length of service: 1 year
Procedure: hard reline

What is the consistency of the material used and the type of cure?

A
  • Consistency: Hard

- Type of cure: self-cured

55
Q

Length of service: 3 yrs
Procedure: Reline

What is the consistency of the material used and the type of cure?

A
  • Consistency:Hard

- Type of cure: Pressure-cured

56
Q

Length of service: 7 yrs
Procedure: Rebase

What is the consistency of the material used and the type of cure?

A
  • Consistency:Hard

- Type of cure: Heat-cured

57
Q

What would you do for 5 year old lower
denture that needs a reline if the lower ridge is SEVERELY RESORBED, as a last resort (i.e. you can’t do any surgical procedure)?

A

Silicone based soft Heat-cured reline.

  • Procedure: Reline
  • Consistency:Soft
  • Type of cure: Heat-cured
Note: Silicone does not contain
plasticizers and due to the lower
degree of cross-linking
compared with their heat
activated counterparts, they
cannot survive long term.
58
Q

Which dentures have lower allergenicity, Analogue or Milled?

A

Milled

Since they contain PMMA, are 20% denser and have less free monomer.
Note: PMMA has Negligible free monomer

59
Q

Monomer used in Milled dentures

A

PMMA

60
Q

Monomer used in printed dentures

A

Urethane methacrylate

Remo (6 decks)

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