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Removable Pros C/P > Complete Denture construction stages > Flashcards

Complete Denture construction stages Flashcards

1
Q

For denture anatomy i can’t upload photos so look at lecture

A

lol what a pain

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2
Q

Hamular notch

A

between distal surface of tuberosity andhamular process of the medial pterygoid plate

DISTAL BORDER OF DENTURE - PERIPHERAL SEAL

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3
Q

Denture retention - anatomy

A

Hamular notch
ridge
full depth and width of sulcus

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4
Q

Retromolar pad purpose

A

AIDS SUPPORT
- triangular soft pad on tissue
posterior edge of edentuloud ridge

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5
Q

Retromylohyoid space

A

AIDS RETENTION AND STABILITY

-distal end of lingual sulcus, posterior to mylohyoid muscle

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6
Q

Cawood and Howell ridge classification

A 
I - dentate
II - post XLA
III - broad alv ridge
IV - knife edge ridge
V - flat ridge
VI - submerged ridge
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7
Q

Edentulous patient - bone change

A

No remaining teeth or roots
No remaining periodontium
No means of retaining the alveolar bone around teeth
Maximum rate of bone loss in the first 3 months
Bone loss continues over the lifetime of the patient
Tissues not created to withstand load from dentures

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8
Q

Extraoral changes in edentulou patient

A

Loss of facial height
Altered profile
altered low and up lip

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9
Q

Physiological changes in edentulous patient

A 
Loss of proprioception
Decreased masticatory efficiency
Decreased incising efficiency
Decreased swallowing efficiency
Problems with speech
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10
Q

What is support and how is it achieved with anatomy

A

Resistance to occlusally directed load

Mandible
buccal shelf, residual ridge and retromolar pad
Maxilla
hard palate, residual ridge

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11
Q

What is retention and how is it achieved with anatomy

A

Resistance to vertical displacement of denture

Accurate fit of the denture base to the mucosa so that the space between the two is as small as possible.
Border seal achieved by extending the denture flanges to the depth of the functional sulcus and incorporation of post dam on C/
Avoid frenal attachments

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12
Q

What is Stability and how can it be tested

A

Resistance to horizontal displacement of denture

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13
Q

Impression compound features

A 
NON elastic
NOT accurate
dimensionally stable
Primary imps
NOT FOR FLABBY RIDGES
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14
Q

Alginate features

A

NOT dimensionably stable
ELASTIC
accurate
messy

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15
Q

Silicones features

A

HYDROPHOBIC
Variable consistencies
Accurate
Dimensionably stable

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16
Q

Polyether features

A

HYDROPHILLIC
Single consistency
Accurate
DImensionably stable

17
Q

What is balanced occlusion

A

As a jaw recording for complete denture wearers is made in the retruded jaw position the artificial teeth must be
adjusted to enable a degree of protrusive movement by approximately 2 mm into a centric relation position or (ICP). This applies to posterior teeth in contact but also must account for the anterior tooth relationship which should have approximately 2 mm of overjet to enable this transitional movement

18
Q

Name 4 different types of base irregularities in acrylic

A
  • Contraction - insufficient pressure during processing (everywhere)
  • Granular- incorrect mix ratio (rough surface everywhere)
  • Gaseous - boiling of monomer (Thick areas of baseplate)
  • Crazing - Coefficients of thermal expansion e.g. porcelain teeth and acrylic base plate/Prolonged stressing during function (fine cracks)
19
Q

Taking impressions - process

A
  • Select stock tray size, try in,
  • Undercuts will determine the imp material
  • Place material in tray
  • Stand infront -low, Stand behind - UP
  • check all areas of imp, repeat if necessary
20
Q

How to use Impression compound

A

Place in bowl with paper at bottom. Hot water 55-60 degrees. place in for 4-5 mins. (plasticiser may leak out if longer)

21
Q

Spacing for material use in secondary imp

A

-Alginate 3mm
-Silicone/polyether
•spaced 2mm (often upper)
•Close fitting 0.5-1mm (often lower

22
Q

What are stops used for in secondary imps

A

create space for material and correction of posterior border (Up -canines/post dam) (Low - Retromolar pad/canain region)

23
Q

Objective of jaw registration (5)

A
  • define max rim shape
  • determine occlusal plane
  • determine jaw relationship
  • define lower teeth position
  • select shade and mould
24
Q

Steps of registration

A 
Step 1: Adjust the upper record block
Step 2: Lip line and occlusal plane
Step 3: Measure vertical dimension and
establish face height
Step 4: Lower tooth position
Step 5:Registration
Step 6: Selection of teeth
LIMBO
25
Q

What will cause the block to drop

A
  • Too much lip support

- Overextension

26
Q

How to test incisal plane level

A

‘F’ Sound
Look
lip level

27
Q

Ideal tooth position

A

Anteriors - 1cm in front of incisive papilla
canine - below nose

Over ridge, neutral zone

28
Q

Lines to mark on registration

A

Centre line
Canine line
lip line/smile line
occlusal plane

29
Q

Methods to measure facial height

HOW

A
  • Visual
  • Dividers
  • Willis bite gauge
  • Mark two point of minimal muscle interference
  • ask partient to moisten lips
  • reduce lower block until upper contacts the upper evenly

RVD - OVD = FWS , 2-4mm

30
Q

If retention of a jaw reg is poor, what should you do

A
  • check extension
  • teke imp
  • correct occlusion
  • record occlusion
31
Q

Checks prior to inserting tooth trial

A
  • correct trial for patient
  • fit on cast
  • finish
  • occlusal contact
  • centre lines meet
  • OJ/OB
  • Teeth set = over ridge
  • inclination of incisors - space for tongue etc.

Check surfaces - polished,impression, occlusal surfaces

32
Q

What is Hanua’s quint

A

5 factors that affect balanced occlusal articulation

  1. Sagittal condylar guidance angle
  2. Inclination fo occlusal plane
  3. Cusp height
  4. Compensating curve
  5. Incisal guidance angle
33
Q

Tooth trial in mouth - Sequence

A 
One at a time, moisten.
LIMBO
Extension, Stability, Retention, 
Incisal plane angulation - fox's plane guide
Aesthetic and speech
34
Q

Balanced occlusion definition

-5 determinants = Hanau’s quint

A

Occlusion with similataneous contact of all/most occlusal surfaces on both sides of the arch in all mandibular positions

  1. Sagittal condylar guidance angle
  2. Inclination fo occlusal plane
  3. Cusp height
  4. Compensating curve
  5. Incisal guidance angle
35
Q

Speech evaluation:

  1. Teeth contact during speech
  2. Whistling sound while speaking
A
  1. Not enough inter-occlusal space

2. greater FWS, treat by >OVD/change anterior tooth position

36
Q

Denture delivery steps

A 
Extension
•Retention
•Stability
•Occlusion
•OcclusalPlanes
•OVD, FWS
•Appearance
•Speech
37
Q

What is selective grinding

A

Use articulating paper
Remember bases are unstable and denture moves
Adjust carefully
BULL rule.
Buccalupper (Palatal surface of buccalcusp) and
Lingual lower (buccalsurface of lingual cusp).
Adjust the contacting surfaces rather than the tips of the cusps

38
Q

Re-record occlusion if incorrect

A 
clinic
1.Remove the lower teeth (if upper is fine)
2.Replace with wax
3.Re-Record the registration
4.Prescribe another wax trial
5.Give both dentures to the lab
laboratory
Laboratory remount on articulator
Reset lower teeth
clinic
Retrial

Removable Pros C/P (3 decks)

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