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Remo > CH3: Anatomy and the Impression Posterior Palatal Seal > Flashcards

CH3: Anatomy and the Impression Posterior Palatal Seal Flashcards

1
Q

Post Dam Clinical Technique

On Patient

A
  1. Locate hamular notches with T-ball burnisher
  2. Place a perpendicular line with indelible pencil.
    Observe repeated phonetic ‘ah’.
  3. Scribe “ah” line (AVL) with indelible pencil.
  4. Insert record base and transfer AVL pencil line.
  5. Cut record base back to AVL.
  6. Palpate outline of compressible tissue.
  7. Outline CTL with indelible pencil.
  8. Insert record base and transfer CTL pencil line.
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2
Q

Post Dam Clinical Technique

On Cast

A
  1. Score AVL and transfer through both Hamular
    notches to ½ depth measured.
  2. Score CTL transfer just enough to break
    surface of cast.
  3. Connect CTL and AVL by tapering from zero
    depth at the CTL to AVL depth.
  4. Blend smoothly into cast.
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3
Q

____ Is a bead on the internal surface of the upper denture

A

PPS

Completes the border seal

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4
Q

PPS shape

A

“butterfly” shaped
-because it is narrower in the
middle (PNS) & at both ends (HN)

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5
Q

PPS boundries

A

 Ends anteriorly at the junction of compressible and non-compressible
tissue
 Ends posteriorly at the junction of movable and non-movable
tissue
 Must include both Hamular Notches

NOTES:
 Is deepest where the tissue is most compressible

 Is shallowest where the tissue is least compressible

 Is deepest posteriorly & shallowest anteriorly

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6
Q

PPS Compresses compressible tissue only. T/F

A

T

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7
Q

Where is the PPS deepest?

A

Is deepest where the tissue is most compressible

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8
Q

Where is the PPS shallowest?

A

Is shallowest where the tissue is least compressible

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9
Q

PPS is deepest ______ (anteriorly/posteriorly) & shallowest (anteriorly/posteriorly)

A
  • Deepest: Post

- Shallowest: Ant

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10
Q

PPS function wrt Retention/Movement

A

 It increases denture retention
 Keeps air out when the soft palate lifts
 Increases adhesion by increasing surface area
 Increases cohesion by increasing adaptation/closeness
 Decreases denture movement
 Decreases gagging due to decreased movement

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11
Q

PPS function wrt Fabrication

A

 Allows thickening of the denture along the interior of the
posterior border (intaglio surface)
 Allows thinning of the polished surface
 Decreases gagging due to decreased denture thickness
 Decreases shrinkage during processing
 Decreases warpage during wearing
 Can be developed either
functionally (at impression stage)
or mechanically (at cast stage) - WE DO BOTH!

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12
Q

To help visualize the junction of movable & non- movable tissue (near PPS) as step 1, place indelible pencil line ____ (parallel/perpendicular) between AVL & PVL

A

Perpendicular

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13
Q

_____ phonetic, when repeated,
will allow the operator to visualize the junction between moveable
and non-moveable tissue

A

Ah

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14
Q

Avg width of the post dam area at the widest location

A

4 to 6 mm

at the widest location

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15
Q

PPS is deepest along ___ line

A

AVL (i.e. anteriorly)

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16
Q

PPS is Shallowest at the _____ Line

A

Compressive Tissue Line (0 mm)

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17
Q

PPS is narrowest at ____

A

PNS (0mm)

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18
Q

Scoring of PPS on the cast is always extended into _____

A

Scoring is always extended into DB folds

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19
Q

Post dam prevents food from getting underneath the denture. T/F

A

T

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20
Q

Post dam does NOT diminishes/eliminate gagging. T/F

A

F.

PPS diminishes/eliminates gagging

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21
Q

_______ Compensates for volumetric shrinkage of the acrylic resin during denture processing

A

PPS

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22
Q

While transferring PPS measurements to the cast, the cast is scored to ____ depth of intraoral measurements

A

½ depth of measurements

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23
Q

Anterior Border molding movements

Mandible

A
  • Roll the lip over
  • Pull the lip upward
  • Smile big
  • Pucker your lips
  • Suck on a straw
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24
Q

Posterior Border molding movements

Mandible

A
  • Roll the cheeks over
  • Pull the cheeks forward and downward
  • Smile big
  • Pucker your lips
  • Suck on a straw
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25
Anterior Border molding movements | Mandible are affected by which muscles?
Obicularis Oris
26
Posterior Border molding movements | Mandible are affected by which muscles?
Buccinator
27
Masseteric | notch is due to which muscles?
Action of Masseter on | Buccinator
28
How do we record the Massetric notch?
• Try to resist while the patient tries to close • Ooo, eee
29
The lingual aspect of mandibular border molding is affected by which muscles?
- Genioglossus: Ant - Mylohyoid: Mid-post - Superior Constrictor: Post
30
How do we record Lingual Border molding movements?
Tongue forward/out/up • Move your tongue to left and right • Lick your upper lip • Swallow
31
Lingual border of the lower denture is ___ shaped
"s" shaped
32
6 Border Muscles that affect final Final Mucostatic Impression of the Mandible
(Oh God My Brother Bought My Super-car) 1) O-Obicularis Oris 2) G-Genioglossus 3) (My Brother)-Mylohyoid on Buccinator 4) B-Buccinator 5) My- Mylohyoid 6) Sc: Superior Constrictor
33
PPS outline/structures that delimit it
* Anteriorly by the CTL * Posteriorly by the AVL * Laterally by the HN and the DB folds
34
6 Border structures that affect final Final Mucostatic Impression of the Maxilla
``` Oh Boy, CPT Leave 1) O-Obicularis Oris 2)B- Buccinator 3) C- Coronoid process of mandible 4)P-Pterygomandibular Raphe 5) Tensor Veli Palatini 6)Levator Palati ```
35
Support of maxillary denture:
- Palate - Zygomatic shelf - Crest of the ridge
36
Support of mandibular denture:
- Buccal shelf - Retromolar pads - Crest of the ridge
37
Purpose of an edentulous impression
-Retention: -Adhesion -Cohesion -Atmospheric pressure edentulous impression
38
Border seal
the contact of the denture border with the underlying or adjacent tissues to prevent the passage of air or other substance
39
Muscles of | mastication
* Masseter** * Temporalis * Medial pterygoid * Lateral pterygoid * Ant. belly of digastric
40
Muscles of facial expression
* Orbicularis oris** * Depressor anguli oris * Depressor labii inferioris * Mentalis * Buccinator** * Risorius * Platysma * Levator labii superioris * Modiolus
41
Muscles of | the floor of the mouth
* Mylohyoid** * Genioglossus** * Styloglossus * Hyoglossus
42
Muscles of oropharynx
* Superior constrictor** * Tensor Veli Palatini** * Levator Palati**
43
Border muscles | of the dentures
* Orbicularis oris | * Buccinator
44
Recording the Border muscles | of the dentures (*Clinical Significance)
* Puckering the lips, * sucking on a straw * whisteling * smiling
45
Muscles of the floor of the mouth comprising the borders of the mandibular denture
* Mylohyoid | * Genioglossus
46
Muscles of the floor of the mouth comprising the borders of the mandibular denture (*Clinical Significance)
``` During function: • Movements of the tongue: • Swallowing • Protruding tongue • And Side to side ```
47
Muscles of | oropharynx affecting the denture
• Superior constrictor
48
Retromylohyoid space
* Laterally: retromolar pad * Medially: tongue * Posteriorly: sup constrictor * Anteriorly: mylohyoid
49
Mandibular Sling
* Masseter | * Medial pterygoid
50
The Masseteric Notch is a _______ (anatomic/functional), NOT a ______(anatomic/functional) feature.
The Masseteric Notch is a functional, NOT an anatomic feature.
51
MN is a denture border formed by the interaction of 2 muscles, _____ & _____
MN is a denture border formed by the interaction of 2 muscles, 1) Masseter which elevates the mandible and 2) Buccinator which shapes the mouth during chewing or speech or swallowing.
52
The interaction of Masseter and Buccinator results in the MN which is a _______ (concavity/convexity)
concavity
53
How is the Coronoid process recorded?
- Open mouth | - Move the lower jaw from side to side
54
Hamular notches are also called _____
Pterygo-maxillary Notches
55
Muscles that affect the posterior border of the denture
- Tensor veli palatini | - Levator palatini
56
The _______ are unreliable guides for locating the posterior border of the maxillary denture.
fovea palatini
57
Primary stress-bearing | areas lower arch
- Retromolar Pads | - Buccal shelf area
58
Buccal shelf area boundries
- Laterally: external oblique ridge | - Medially: Alveolar ridge
59
Primary stress-bearing | areas maxillary arch
- Palate | - Zygomatic shelf
60
Border molding is _____ mucostatic or mucodynamic?
mucodynamic
61
Border molding in anterior Maxilla is affected by _____ muscle
Obicularis Oris
62
Border molding moments for anterior (labial flange) Maxilla
* Roll the lip over * Pull the lip downward * Smile big * Pucker your lips * Suck on a straw
63
Border molding moments for anterior buccal flange Maxilla
* Roll the cheeks over * Pull the cheeks forward and downward * Smile big * Pucker your lips * Suck on a straw
64
Recording Coronoid process of mandible during upper border molding
* Open big * Close half way * Move your jaw from side to side
65
4 border muscles of maxilla
Old Boy is LaTe - O=Obicularis Oris - B=Buccinator - L=Levator Palati - Tensor Veli Palatini

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