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RCD 1001 > Arch Design, VDO, Centric Relation > Flashcards

Arch Design, VDO, Centric Relation Flashcards

1
Q

The potential space between the lips and cheeks on one side and the tongue on the other; that area or position where the forces between the tongue and cheeks or lips are equal.

A

Neutral Zone

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2
Q

Where tooth stability is achieved

A

Neutral Postion

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3
Q

Occluding surfaces fabricated on interim or final denture bases for the purpose of making maxillomandibular relation records and arranging teeth

Contoured to fill neutral zone

A

Occlusal Rim

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4
Q

What are 3 purposed of occlusal rims?

A
  1. Maxillow mandibilar relation records
  2. Teeth arangement
  3. Support lips
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5
Q

the bony portion of the maxilla and the mandible in which roots of the teeth are held by fibers of periodontal ligament

denture replaced this

A

Alveolar Bone

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6
Q

In what direction does the maxilla resorb?

A

Up & inwad
* Become smaller

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7
Q

In what directon does the mandibular bone resorb?

A

Out and down
progressivley wider and thinner

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8
Q

This progressive change of the edentulous mandible and maxilla makes many patients appear

A

Prognathic or pseudoprognathic

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9
Q

Trends in mandibular residual ridge

Anterior?
PM?
Molar?

A

more resorbtion on
* Anterior= labial
* PM= equal on buccal & lingual
* Molar= lingual

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10
Q

The net morphological result of mandibular ridge resorbtion is ?

A

Ridge more lingually placed anteriorly, and ridge more buccaly placed on posterior region.

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11
Q

How do you compensate for mandibular ridge resorbtion with occlucal rim?

A
  • Make occlusal rim labial to ridge inthe anterior PM area
  • Rim slightly lingual to ridge onmolar area
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12
Q
A
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12
Q

Tongue size and postion during function affects stabilit of ____ denture

A

mandibular denture

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13
Q

optimal neutral zone determination is still ____ for speech and esthetic purposes.

A

manditory for speech and esthetic purposes

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14
Q

Where does maxillary residual ridge resorbtion occur?

A

Labial and buccal so ridge is usally paletal to original location

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15
Q

This force occurs at the jaw-to-jaw position that is determined by a consistent, repetitive contracted length of the elevator muscles.
* Present throughout tlife
* Erupt until smth stops them

A

Tooth Eruptive force

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16
Q

Postion where teeth hit together, the tightest or best fit between maxillary and mandibular posterior teeth.

A

Maximum Intercuspation (MIP)

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17
Q

The complete intercuspation of the opposing teeth ____ of condylar position.

A

independent

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18
Q
A
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19
Q

The distance measured between two points when the occluding members are in contact

A

Verticle demenstion of occlusion VDO

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20
Q

occurs at maximum intercuspation, regardless of condyle position, when teeth are together.

A

VDO

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21
Q

The determinant of VDO is the _____

A

Elevato Muscles

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22
Q

VDO is measured from

A

zygoma to the angle of the mandible (B).

A can very with potion of condyles so not relabel determinant.
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23
Q

What should the upper and lower heights of the face be?

A

Approximally equal!

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24
WHat can be a result of collapse of VDO?
Bite collapse! Usually a result of endentulousness
25
How is VDO established
as part of the process of **jaw development and maturation**. Changes overtime with **resorbtion**
26
What are 3 test that aid in establishing correct VDO by occlusion rims?
1. Visual observation (look at space btwn re 2. Esthetic facial postion 3. Phonetics test (S sound)
27
The postural **position of the mandible when an individual is resting comfortably** in an upright position and the associated muscles are in a state of minimal contractual activity
Physiological Rest Postion/ Verticle Dimension at rest VDR | All muscles resting, mandible in this postion >23hrs a day
28
Space formed when all muscles are at rest, teeth are seperated. **Space between the occlusal surfaces of the Maxillary and Mandibular teeth while the Mandible is in rest position (usually around premolar area)**
Freeway space | unclenched
29
2-4mm of freeway space in what area?
Around canine area | Can change if head postrue changed
30
31
Normally, VDO is ____ short from the ____
VDO is 2-4mm short (freeway space) from the VDR
32
How much freeway space is normally seen?
2-4mm of freway space
33
How to find exact amount of freeway space steps?
1. Mark 2 dots, one on chin one on tip of nose 2. Measure dots in occlsuion **VDO** 3. Ask pt to swallow and realx, measure **VDR** 4. Subtract **VDR-VDO= FS **
34
34
If **FS is >4mm**: VDO is?
Overclosed
35
If **FS is < 2mm** VDO is?
Too open
36
What is one method for observing **VDR** in **denture patients**?
By using wax rims
37
How thick do you like wax rims on max and mandible?
* 22mm thick Max * 18mm thick Mand
38
# A result of what? * **Excessive loading** of denture bearing tissues. * Elevator **muscles are unable to return to their normal** resting length. * **Continuous muscular activity** results in pain.
Reduction of Freeway space, esentially little to no rest
39
# A result of what? * **Reduction of masticatory ** efficiency. (cant bring teeth together) * **Poor facial** appearance and **cheek biting**. * Developing symptoms related to **TMJ**.
Too much freeway space
40
40
What is this a result of?
Caused but overclosure of denture,**reduced VDO**
41
Failure to provide an adequate ____ results in the **anterior lower ridge** assuming a more **labial** **relationship to the upper ridge.**
**Bad VDO**= anteiror lower ridge more **labial** than upp ridge
42
A result of? | face looks distorted and lips are incompetent.
VDO too open, large
43
A result of?
VDO is too closed; short! | border appears thin, wrinkles appear around lips, and chin protrudes.
44
What are some words for the phonetics test of VDO?
Emma, Ohio
45
overclosure from l**loss of vertical dimension**, oral skin bacteria and fungi pool in corners of mouth (namely Candida)
Angular cheilitis
46
A maxillomandibular relationship, i**ndependent of tooth contact**, in which the **condyles articulate in the anterior-superior position** against the posterior slopes of the articular eminences **relationship people return too each time they chew and swallow** No affected by presence or absence of teeth, does not change, does not coincined with MIP
Centric Relation
47
Tongue to roof of mouth gives?
Centric Relation
48
The **occlusion** of opposing teeth when the mandible is in **centric relation**
Centric Occlusion | may or may not be at MIP
49
Centric occlsuion VS Maximal innercupal postion Condylar postion?
CO= depened on condylar postion MIP= indepened of condylar postion
50
**average plane** established by the **cusp tips and incisal edges** of the teeth extended to include the cusp tips of the **opposite side**
Plane of occlsuion
51
52
Curve of?
Curve of Spee
53
Curve of?
Curve of Wilson
54
Level & heigh of the occlusal plane is establishe by the?
Occlusal wax rims
55
In establihsing height of the occlusal plane, the corners of the mouth act as what?
anterior landmarks for the **height of the first premolars.**
56
57
stable posterior landmarks, even in patients with advanced ridge reduction.
Retromolar pads
58
Where are the mandibular 1st molar level in relation to the retromolar pad?
mandibular first molar is usually at a level corresponding to **2/3rd of the way up the retromolar pad** | height of the distal end of the mandibular occlusal rim.
59
establish the **references in the cranium**. E.g.: Face bow record
Oreitnetion relations
60
establish the amount of **jaw separation** allowable for use for denture. E.g.: VD
Verticle Relations
61
establish **front-to-back and side-to-side relations** of one jaw to another. E.g.: Centric relation, centric occlusion
Horizontal relations

RCD 1001 (9 decks)

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