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

CH 11B: Reline, Rebase, Repairs Flashcards

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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
Outline of Post dam for reline/rebase is drawn on _____ (cast/impression)
impression because cast does not yet exist
26
For reline/rebase procedure, the cast is separated/retrieved after being poured PRIOR to making the Occlusal index. T/F
F DO NOT SEPARATE until occlusal index is made
27
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
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
When repairing a denture with a broken tooth; the tooth is luted on facial with _____ wax
sticky wax
29
When repairing a denture with a broken tooth, space is created on ________(buccal/lingual) aspect of the denture for repair acrylic
Space is created on *lingual* for repair acrylic
30
Time and pressure for curing repair acrylic
20 lb psi for 20 min
31
Craze line was discovered in overdenture at first denture recall. Will you recommend reline, repair or rebase?
Rebase Weak repair site which is liable to re-fracture (eg. craze line, midline fracture etc) is an indication for a *Rebase*
32
Repair site is NOT widened on intaglio side. T/F
T
33
How will you assess a Denture Base Fracture at Overlay Abutment Site?
- check occlusion and proper height of abutments | before addressing the repair
34
Denture Base Fracture at Overlay Abutment Site will need a _____ (reline/rebase) as a definitive treatment.
Rebase Overdenture repair site likely to re-fracture & will need a *Rebase* as a follow-up for definitive treatment
35
Why are Incipient or Complete Midline Fractures first repaired?
We repair it in order to take a final impression for the Rebase *Rebase* as a follow-up for definitive treatment
36
Pt dropped the denture and fractured the denture border. Will you recommend reline, repair or rebase?
Repair Border is NOT likely to re-fracture
37
Chief Concern: Whistle-pathognomonic -Problem?
Maxillary teeth set too far | lingually (offset correctly with mandibular teeth)
38
Chief Concern : Whistle-pathognomonic -Repair?
Reset upper teeth; | lower may or may not require reset depending on offset/ crossbite
39
Chief Concern: Lisp-pathognomonic “so” sounds like “show” -Problem?
Maxillary teeth set too far buccally (offset correct with mandibular teeth)
40
Chief Concern: Lisp-pathognomonic “so” sounds like “show” -Repair?
Add wax to linguals of upper | denture teeth process
41
Chief Concern: Cheek biting/ Tongue biting -Problem?
Maxillary teeth and mandibular teeth set edge to edge regardless of B/L position on the ridge
42
Chief Concern: Cheek biting/ Tongue biting -Repair?
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
Chief Concern: T sounds like D -Problem?
Maxillary anterior teeth too lingual
44
Chief Concern: T sounds like D or D sounds like T -Repair?
``` 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
Chief Concern: D sounds like T -Problem?
Maxillary anterior teeth too | labial
46
“Pick-Up” Impression
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
When a denture requires a reline, rebase, repair, what questions do we need to ask?
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
If an IMMEDIATE DENTURE is not retentive at the insertion appointment, the material used to increase retention is:
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
What would you do for 5 year old denture that needs a reline if you know the average denture lasts about 7 years?
- 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
What would you do if a brand new | denture fractures from a fall?
``` Plan Repair (splint) then rebase heat-cured hard. ``` Rebase* is the definitive treatment
51
Length of service: 1 week Procedure: reline What is the consistency of the material used and the type of cure?
- Consistency: super-soft | - Type of cure: self-cured
52
Length of service: 1 month (4weeks) Procedure: reline What is the consistency of the material used and the type of cure?
- Consistency: soft | - Type of cure: self-cured
53
Length of service: 1 year Procedure: soft reline What is the consistency of the material used and the type of cure?
- Consistency: soft | - Type of cure: pressure-cured
54
Length of service: 1 year Procedure: hard reline What is the consistency of the material used and the type of cure?
- Consistency: Hard | - Type of cure: self-cured
55
Length of service: 3 yrs Procedure: Reline What is the consistency of the material used and the type of cure?
- Consistency:Hard | - Type of cure: Pressure-cured
56
Length of service: 7 yrs Procedure: Rebase What is the consistency of the material used and the type of cure?
- Consistency:Hard | - Type of cure: Heat-cured
57
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)?
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
Which dentures have lower allergenicity, Analogue or Milled?
Milled Since they contain PMMA, are 20% denser and have less free monomer. Note: PMMA has *Negligible free monomer*
59
Monomer used in Milled dentures
PMMA
60
Monomer used in printed dentures
Urethane methacrylate

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