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CASE PRES > Prosthodontic > Flashcards

Prosthodontic Flashcards

1
Q

What is kennedy class I

A

Bilateral free end saddle

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2
Q

What is kennedy class III

A

A BOUNDED SADDLE

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3
Q

Which saddle detemines kennedy classification

A

The most posterior saddle

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4
Q

What are the three support classifications?

A
  • Class 1 - Tooth borne
  • Class 2 - Mucosa borne
  • Class 3 - Tooth and mucosa borne
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5
Q

What is meant by retention?

A

resistance of the denture to vertical displacement

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6
Q

What are some methods of retention used in RPD Design?

A

clasps
soft tissue undercuts
path of insertion
precision attachments/implants

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7
Q

What is meant by indirect retention?

A

resistance of the denture to rotational displacement

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8
Q

What is meant by reciprocation in RPDs?

A

Prevention of a clasp arm moving the clasped tooth

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9
Q

What can you use to record the inter-occlusal record during a jaw reg?

A
  • bite registration paste
  • wax wafer
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10
Q

What are the stages in RPD construction?

A
  • primary impressions
  • mount and survey study casts
  • design denture
  • tooth prep if required
  • master impression
  • jaw registration
  • delivery
  • review
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11
Q

How deep should rest seats be?

A

Deep enough to allow a rest of at east 1mm thick

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12
Q

What are guideplanes?

A

2 or more parallel axial surfaces on abutment teeth which limit the path of insertion of a denture

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13
Q

What do guide planes provide?

A
  • increased stability
  • reciprocation
  • prevention of clasp formation
  • improved appearance
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14
Q

How would you take an impression for enedtulous areas?

A

using impregum which is a polyether

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15
Q

List the steps involved in master impression?

A
  • try in stage special tray and trim peripheriess if overextended
  • modify peripheries with green stick
  • modify free end saddles with green stick
  • applyy adhesive and use alginate
  • disinfect and place in sealed bag
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16
Q

What is the technique used to create a cobalt chromium RPD base?

A

LOST WAX TECHNIQUE

17
Q

Why must we record the occlusion in the production of RPDs?

A
  • to know the position of the teeth to each other
    • this facilitate denture design by noting heavy occlusal contacts and ensure loading forces are directed in the correct direction
18
Q

How do you record the OVD?

A

willis bite gauge
dividers

19
Q

What problems may cause record block to be displaced when trying it in ?

A
  • overextension into peripheries
  • too much lip support
20
Q

what reference points/lines are important to note at jaw registration?

A
  • midline
  • canine line
  • interpupillary line to guide incisal plane
  • ala tragus line
  • smile line
  • incisal level
21
Q

What materials can artificial teeth for RPDs be composed of?

A

acrylic and procelain

22
Q

What instructions would you provide to the patient at the RPD delivery stage?

A
  • how to insert or remove denture
  • denture cleaning instructions
  • when to wear it (to remove it at night)
  • OHI of remaining teeth
23
Q

What warning would you give the patient at RPD delivery stage?

A

excess saliva initially
speech difficulties which will get better over time
eating discomfort initially
soreness, can adjust denture later on if any parts of it is sore

24
Q

What might be the cause if the patient is experiencing pain after wearing the denture on all the denture area?

A
  • not enough freeway space
  • pt might also complain of discomfort in MoM and TMJ
25
Q

Why did you choose tooth support?

A
  • more comfortable
  • load transmits to PDL
  • protects soft tissues from trauma
26
Q

How does RPD achieve physical retention?

A
  • through adhesion and cohesion using saliva (determined by closeness of adaptation to tissues)
27
Q

What is the ideal pattern of retention?

A

triangular pattern of retention

28
Q

What is the minimum thickness of a lingual bar ?

A

2mm

29
Q

How much space is usually required for a lingual bar?

A

8mm
- 3mm below gingival margin
- 4mm bar thick
- 1mm clearance in floor of the mouth

30
Q

Why use impregum for edentulous areas?

A
  • due to high dimensional stability
31
Q

What is the length of a cobalt chromium clasp?

A

15mm

32
Q

how deep should the undercut be?

A

0.25mm

33
Q
A

CASE PRES (7 decks)

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