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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
Q

WHat can be a result of collapse of VDO?

A

Bite collapse! Usually a result of endentulousness

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25
Q

How is VDO established

A

as part of the process of jaw development and maturation. Changes overtime with resorbtion

26
Q

What are 3 test that aid in establishing correct VDO by occlusion rims?

A
  1. Visual observation (look at space btwn re
  2. Esthetic facial postion
  3. Phonetics test (S sound)
27
Q

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

A

Physiological Rest Postion/ Verticle Dimension at rest VDR

All muscles resting, mandible in this postion >23hrs a day

28
Q

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)

A

Freeway space

unclenched

29
Q

2-4mm of freeway space in what area?

A

Around canine area

Can change if head postrue changed

30
Q
A
31
Q

Normally, VDO is ____ short from the ____

A

VDO is 2-4mm short (freeway space) from the VDR

32
Q

How much freeway space is normally seen?

A

2-4mm of freway space

33
Q

How to find exact amount of freeway space steps?

A
  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
Q
A
34
Q

If FS is >4mm: VDO is?

A

Overclosed

35
Q

If FS is < 2mm VDO is?

A

Too open

36
Q

What is one method for observing VDR in denture patients?

A

By using wax rims

37
Q

How thick do you like wax rims on max and mandible?

A
  • 22mm thick Max
  • 18mm thick Mand
38
Q

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.
A

Reduction of Freeway space, esentially little to no rest

39
Q

A result of what?

  • **Reduction of masticatory ** efficiency. (cant bring teeth together)
  • Poor facial appearance and cheek biting.
  • Developing symptoms related to TMJ.
A

Too much freeway space

40
Q
A
40
Q

What is this a result of?

A

Caused but overclosure of denture,reduced VDO

41
Q

Failure to provide an adequate ____ results in the anterior lower ridge assuming a more labial relationship to the upper ridge.

A

Bad VDO= anteiror lower ridge more labial than upp ridge

42
Q

A result of?

face looks distorted and lips are incompetent.

A

VDO too open, large

43
Q

A result of?

A

VDO is too closed; short!

border appears thin, wrinkles appear around lips, and chin protrudes.

44
Q

What are some words for the phonetics test of VDO?

A

Emma, Ohio

45
Q

overclosure from lloss of vertical dimension, oral skin bacteria and fungi pool in corners of mouth (namely Candida)

A

Angular cheilitis

46
Q

A maxillomandibular relationship, independent 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

A

Centric Relation

47
Q

Tongue to roof of mouth gives?

A

Centric Relation

48
Q

The occlusion of opposing teeth when the mandible is in centric relation

A

Centric Occlusion

may or may not be at MIP

49
Q

Centric occlsuion VS Maximal innercupal postion

Condylar postion?

A

CO= depened on condylar postion
MIP= indepened of condylar postion

50
Q

average plane established by the cusp tips and incisal edges of the teeth extended to include the cusp tips of the opposite side

A

Plane of occlsuion

51
Q
A
52
Q

Curve of?

A

Curve of Spee

53
Q

Curve of?

A

Curve of Wilson

54
Q

Level & heigh of the occlusal plane is establishe by the?

A

Occlusal wax rims

55
Q

In establihsing height of the occlusal plane, the corners of the mouth act as what?

A

anterior landmarks for the height of the first premolars.

56
Q
A
57
Q

stable posterior landmarks, even in patients with advanced ridge reduction.

A

Retromolar pads

58
Q

Where are the mandibular 1st molar level in relation to the retromolar pad?

A

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
Q

establish the references in the cranium.
E.g.: Face bow record

A

Oreitnetion relations

60
Q

establish the amount of jaw separation allowable for use for denture.
E.g.: VD

A

Verticle Relations

61
Q

establish front-to-back and side-to-side relations of one jaw to another.
E.g.: Centric relation, centric occlusion

A

Horizontal relations

RCD 1001 (9 decks)

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