Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Dental Anatomy > TMJ & Oral Mucosa > Flashcards

TMJ & Oral Mucosa Flashcards

1
Q

Describe the condyle process

A
  1. Wider mesiodistally than anteroposteriorly
  2. Rounded posteriorly, concave anteromedially (pterygoid fovea, where inf. head of lat. pterygoid attach)
  3. The superior anterior aspect (articular surface) is slightly convex
    * The condyle and the articular tubercle are covered by fibrous C.T
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The articular disc is attached to …….

The …… muscle is attached to the disc

A

the articular tubercle (eminence) & laterally to the condyle head
* Superior head of the lateral pterygoid is inserted into the disc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Describe the condyle movement during the following

  1. retrusive movement
  2. protrusive movement
  3. lateral movment
  4. lateral protrusive movement
A
  1. both condyles move backward & upward into the mandibular fossa
  2. both condyles move downward and forward on the eminence
  3. working side: mere rotation. non working side: forward, downward & medially
  4. working side: rotation & forward/downward. non working side: forward, downward & medially
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

All teeth are inclined to a certain degree. T/F??

A

true

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

All teeth are facially inclined except …..

A
  • Mand. second premolar (straightest tooth in relation to the occlusal plane)
  • Mand. molars (lingual tilt)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The tooth with the greatest facial tilt is ……..

A

Max. central incisor

* followed by Max. lateral incisor, and Mand. incisors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The tooth with the greatest mesial tilt is …..

A

the Max. canine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

All teeth have some degree of mesial tilt, except ……

A

Max. central, and Mand. incisors (which are distally tilted)

* The premolars are not tilted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Define:

  1. Curve of Spee

2. Curve of Wilson

A
  1. Anterior posterior relation of teeth view from lateral aspect (Convex for Max., concave for Mand.)
  2. The tilting of the Max. teeth facially and the Mand. teeth lingually gives a convex Max. profile & a concave Mand. profile when view from the front
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

All Mand. roots are tilted ……. & the posterior Mand. are angled ……..

A

distally

facially

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

All Max. roots are tilted ….. & all posterior roots are inclined …….. except …..

A

distally

lingually, except the DB root of the Max. first molar (buccal tilt)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Posselet envelop defines ……

A

the borderline (extent) movement of the mandible.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

In most of the population, IC (centric occlusion) is about ……. anterior to the RC (centric relation)

A
  1. 25 mm
    * From IC to RC, the mandible moves downward & posteriorly
    * See p. 749
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The mandible is capable of two opening movement while in the retruded position, …… & …….

A
  1. Pure rotational: the first 20 mm separation, then the ligament become taut
  2. Translational movement: after relaxation of the ligament, the condyle moves down the articular eminence. This movement occur in regular mouth opening
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The line that connects the maximum opening to the protruded contact position is ……..

A

protrusive opening path

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Freeway space is …….

A

the distance from IC to RP (resting position). It is about 3 mm
* The mandible is in postural position

17
Q

The oral mucosa is composed of ……

The oral mucosa is two types:

A

surface epithelium & lamina propria

  • Beneath the mucosa comes the submucosa
    1. Keratinized: not present normally except the masticatory mucosa or irritation
    2. Non keratinized
18
Q

Non Keratinized mucosa lacks……..

It is composed of ….. & …….

A

stratum granulosum & stratum corneum

  • Composed only of
    1. Stratum basale
    2. Stratum spinosum (large area, since the other two are not present)
19
Q 
Basement membrane (lamina) is located between ......... & ........
It is composed of two layers:
A

the epithelium & lamina propria

  • Two layers:
    1. Lamina lucida: Beneath the epithelium
    2. Lamina densa: Beneath lucida. Connects the above layers to lamina propria
20
Q

The basal cell layer is ……..

A

a single layer of nucleated cuboidal cells resting on the basement lamina
* It is the mitotic layer

21
Q

The spinosum cell layer (prickle layer) is …..

A

composed of nucleated polyhydral cells, larger in non keratinized epithelium. Towards the surface, the cells flatten
* The term prickle cell is caused by fixative, due to pulling of the cell membrane from adjacent cells, while the desmosomal attachment remains intact

22
Q

Stratum granulosum is ……..

A

a layer of flattened cells, contain “keratohyaline”

23
Q

Stratum lucidum appears in …….

A

thick skin (soles) and not in the oral mucosa

24
Q

Stratum corneum is composed of ……

A

cells that have lost their nuclei & filled with keratin

25
Q

There is no keratinization potential in mucosa that abuts …….

A

against a hard surface (not subject to irritation)

* example is sulcular epithelium

26
Q

Lamina propria is ………
Its extensions in the mucosa is called ……
LP rests on ……..

A

dense CT
papillae
* In turn, epithelium has rete pegs extension into the propria
* Submucosa

27
Q

Vermilion border is …..

A

transition zone between the mucous membrane & the skin of the lip

  • Non keratinized, with long papillae close to surface (giving red color) and few sebaceous glands
  • Note that: the skin of lip is keratinized, short papillae with sebaceous & sweat glands & hair
28
Q

In the masticatory epithelium, submucosa is ….., and the lamina propria is …. The exception is ……

A

indistinguishable (thin or absent)
fused to periosteum
hard palate (has definite submucosa, except for the raphe)

29
Q

What is the difference between orthokeratinized & parakeratinized mucosa?

A
  1. ortho: have true keratin (like skin epithelium)

2. para: keratinized cells retain their nuclei

30
Q

Masticatory mucosa is immovable because ….

A

lamina propria (distinguishable or not) is firmly attached by fibrous bands to the periosteum

31
Q

The submucosa in the palate has …… anteriorly & ……. posteriorly

A

adipose tissue

adipose tissue & glands posteriorly

32
Q

Junctional epithelium is ….

A

non kertinized epithelium which lies at the base of the gingival sulcus, and is attached to the surface of the tooth with hemidesmosomes at the CEJ level

  • Roughly 1 mm in width
  • Lacks rete ridges, that is why susceptible to break down by bacteria
33
Q

Lining mucosa covering muscles are fixed to …..

A

epimysium or fascia of respective muscles

34
Q

Non masticatory mucosa covers …..

A

soft palate, ventral surface of tongue, floor of the mouth, cheek, lip, some of the free gingiva, and the alveolar mucosa

35
Q

What are the differences between attached gingiva (ag) & alveolar mucosa (am)?

A
  1. ag: stippled & firm. am: thin & loosely attached
  2. ag: no separate submucosa. am: submucosa is well defined
  3. ag: immovable. am: movable
  4. ag: no glands. am: full of glands
  5. ag: epi thick and keratinized. am: thin & non keratinized
  6. ag: high epi ridges. am: low epi ridges

Dental Anatomy (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions