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DMD 1 Sem 1 > Prosthodontics > Flashcards

Prosthodontics Flashcards

(69 cards)

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1
Q

What are the classes in pros diagnostic index

A

Class 1 minimally compromised
Class 2 moderately compromised
Class 3 substantially compromised
Class 4 severely compromised

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2
Q

Oral proprioception is the info provided by______________

A

teeth to enable appropriate fxntioning of oral cavity (e.g. bite force application)

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3
Q

Osseoperception is the unconscious perception of_______________

A

the position of body/mvmt/spatial orientation in relation to the enviorn

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4
Q

Which 6 things contribute to oral proprioception in dentate

A

nerve endings in tmj, muscles of mastication, oral mucosa, pdl, dental pulp, bone

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5
Q

which 5 things contribute to oral proprioception in teeth

A

nerve endings, dentine, pulp, pdl, bone

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6
Q

What happens to maxilla when patient becomes edentulous

A

move up & in (get smaller)

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7
Q

What happens to mandible when patient becomes edentulous

A

move down & out (light resorption)

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8
Q

What is residual ridge resorption ?

A

Diminishing quantity & quality of residual ridge AFTER TEETH EXT. (a disease ?)

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9
Q

a residual ridge is formed after_________

A

tooth ext

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10
Q

What is the normal process after teeth are extracted ?

A

a clot is formed which later transform into bone (bone is paper thin, which pose problem especially in immediate implants)

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10
Q

What is the clinical impact of losing teeth

A

Denture compressing fluid under gingiva can be damaging

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11
Q

Residual Ridge Resorption is due to____________

A

active osteoclastic bone resorption from external surface of alveolar process of edentulous jaw bone

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11
Q

What is intaglio surface

A

Fitting surface of the denture

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12
Q

What is cameo surface

A

Polished surface of the denture

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13
Q

What impression materials are RIGID & set by chem rxn

A

Plaster, Zinc Oxide Eugenol

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14
Q

What impression materials are ELASTIC & set by chem rxn

A

Alginate hydrocolloid, polysulfide, polyether, silicones

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15
Q

What impression material is RIGID & set by temp. change

A

Compound wax

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16
Q

What impression material is ELASTIC & set by temp. changes

A

Agar hydrocolloid

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17
Q

What are the 5 steps of impression making ?

A
  1. Selection appropriate size tray
  2. Place blue periphery wax & stops
  3. Apply adhesive
  4. Mix alginate & load tray
  5. Put inside mouth
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18
Q

How should the tongue be positioned when taking mand. impression

A

Up & forwards but NOT poking out

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19
Q

Where is the neutral space in impression taking

A

the space between lips & cheeks on one side & the tongue on the other side

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20
Q

What is border moulding in primary impression ?

A

Creating a seal between impression tray & the tissues thru a rim

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21
Q

What is the purpose of border moulding in primary impression ?

A

To capture the periphery @ rest

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22
Q

What does thixotropic mean ?

A

substance becomes less viscous (more fluid) when under stress & mvmt, returns to a more viscous (gel-like) state when at rest.

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23
What is mucostatic impression ?
Impression that captures the oral mucosa (soft tissues) in its resting, non-displaced (undistorted) state.
24
What is mucocompression impression ?
Records the soft tissues of the mouth under pressure, simulating the functional (compressed) state during chewing or speaking.
25
Retention in denture making is the prevention of___________
dislodgement in vertical direction
25
Resisting in denture is to resist___________
Horizontal forces
26
What is selective pressure impression ?
Applies pressure only to specific (primary stress-bearing) areas of the denture-bearing tissues while relieving others.
26
What is functional impression ?
Records the shape of the soft tissues while they are under functional conditions (e.g. speaking, chewing, or swallowing)
26
List 5 Max. anatomical landmarks that are clinically relevant to prothesis
residual alveolar ridges, hard palate, incisive papilla, hamular notches, max. tuberosity
27
List 5 Mand. anatomical landmarks that are clinically relevant to prosthesis
retromolar pads, mylohyoid ridges, buccal sulcus, lingual sulcus, retromylohyoid fossae
28
What is a fish surface
polished CONTOURED surface of flanges
28
List 2 things you can do to take an impression of a HIGHLY RESORBED ridge to capture appropriate shape & ridge
1. Use compound/putty 2. Use double mix of alginate
29
What is dimensional accuracy in secondary impression
Minimizing dimensional changes during & after setting of the model materials
30
What are the 6 important characteristics of gypsum
1. dimensional accuracy 2. fluid when being poured 3. minimize surface voids presence 4. strong to resist accidental fracture 5. hard enough to resist abrasion 6. compatible w/ all other materials it comes in contact
30
What is the preferred type of dental gypsum in manufacturing partial dentures
Model plaster
30
Hygroscopic expansion occurs due to______________
the absorption of moisture
31
How to stop hygroscopic expansion
Use steel rods to stop mvmts of the model
32
What does a snapping INDICATE when removing dentures from oral mucosa
salivary seal being broken
33
Salivary seal is important for_________in dentures
retention !
34
what is the definition of support in dentures
35
Which part of oral cavity does NOT act as sprt area for dentures ?
peripheral tissues
36
What kind of occlusion pattern of teeth should be selected for highly resorbed ridges
Flatter teeth
37
Why is it important to ask patient to move mand. side to side ?
- allow lingual sulcus to be defined on mand. tray - aloow max. tuberosity to be defined on max. tray
38
What are the 3 steps of inserting mand. tray ?
1. stand in front of patient 2. ask patient to lift tongue to roof of mouth 3. seat retromolar pad first then rotate down to anterior ridge
39
Where is posterior palatal seal ?
portion of intaglio surface of denture where it places pressure between hard & soft palate of max.
39
What is the purpose of posterior palatal seal ?
Ensure INTIMATE contact between denture base & soft palate to improve overall retention
39
Which two nerves are responsible for gag reflex ?
Glossopharyngeal & Vagus
39
What are the 4 factors that can cause gag reflex ?
1. -ve past dental experience 2. dental fear level 3. low education 4. gagging of others
40
List 3 techniques to reduce gag reflex ?
1. relaxation techniques 2. acupressure point for distractions 3. positioning patient head upright
41
What is MMR
spatial relationship between max. & mand.
42
What parameters are recorded in MMR
vertical, horizontal & lateral orientations
43
What is the importance of having an accurate MMR
to design an occlusion that limits trauma to denture foundation area
44
What is the formula for FreeWay Space ?
Resting Vertical Dimension - Occlusal Vertical Dimension
44
Fox bite plane is used to determine___________
horizontal relationships
44
- What is Resting Vertical Dimension ? - What is Occlusal Vertical Dimension ?
- Distance between 2 points when mand. is at PHYSIOLOGICAL REST - Distance between 2 points when teeth are in occlusion
44
_____mm of wax should be showing when placing fox bite plane in mouth
2mm
45
FreeWay Space should be =______mm
2-4mm
46
What tool is used to measure Resting Vertical Dimension & Occlusal VD ?
WIllis Bite Gauge
47
What is the preferred material used to record MMR
PVS bite registration
47
Posterior palatal seal can be examined using___________
ball burnisher/end of dental mirror handle
48
How should the patient be seated when taking MMR ?
upright
49
What is the limitation w/ willis bite gauge ?
double chin=inaccurate measurement
50
What is gothic arch tracing
a method of recording how the mandible moves in horizontal planes using a tracing device placed intraorally or extraorally to determine the most accurate centric relation position in COMPLETE DENTURES fabrication ?
51
What is retruded contact position ?
The most retruded relation of the mand. to the max. when condyles are in the most posterior unstrained position in the glenoid fossae from which lateral mvmts can be made?
52
What is interocclusal record ?
Vertical & horizontal relationship of max. & mand. teeth
53
What is an advantage of heat cured acrylic base to improve retention
Hydrophilic ?
54
What is facebow used for
Record the spatial relationship of the maxillary arch to the temporomandibular joints (TMJs), and to transfer this relationship to a dental articulator.

DMD 1 Sem 1 (13 decks)

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