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Advanced Restorative > PDI Lecture Part 1 > Flashcards

PDI Lecture Part 1 Flashcards

1
Q

what is the main advantage of classification systems

A

comprehensive evaluation and assessment of all necessary parameters to help in diagnosis, treatment and prognosis

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2
Q

what are the potential benefits of the PDI system

A
  • improved intraoperatory consistency
  • improved professional communication
  • insurance reimbursement commensurate with complexity of care
  • an improved screening tool for dental school admission clinics
  • standardized criteria for outcomes and research
  • enhanced diagnostic consistency
  • a simplified aid in the decision making process associated with referral
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3
Q

what are the 3 classifications of PDI

A
  • edentulous
  • partially edentulous
  • dentate
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4
Q

what are the 4 categories in the PDI

A

class I - class IV

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5
Q

what is class 1

A

an uncomplicated clinical situation
- straightforward

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6
Q

what is class IV

A

represents a complex clinical situation
- most debilitated edentulous conditition

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7
Q

what are the diagnostic criteria

A
  • bone height - mandibular only
  • residual bone morphology- maxilla only
  • muscle attachments mandibular - mandibular only
  • maxillomandibular relation
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8
Q

what is class II

A

denture supporting anatomy degraded

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9
Q

what is class III

A

anatomy degraded, surgical revision needed, additional factors are present

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10
Q

what are other variables that contribute to increased difficulty

A

the presence of implants
- gag reflex
- tongue size
- interarch space
- psychosocial conditions
- systemic conditions
- refractory patient

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11
Q

how is mandibular bone height measureed

A

at the least height

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12
Q

how is mandibular bone height classified

A
  • 21mm or greater - type 1
  • 16-20 mm- type II
  • 11-15 - type III
  • 10mm or less - type IV
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13
Q

what are the types for muscle attachment

A
  • type A: all regions have attached mucosa without undue impingement during function
  • type B: no attached mucosa in labial vestibule; mentalis muscle attaches near the crest of ridge
  • type C: no attached mucosa in anterior lingual vestibule; genioglossus and mentalis muscle near ridge crest
  • type D: attached mucosa only in posterior lingual region; mucosal base detached in all other regions
  • type E: no attached mucosa in any region
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14
Q

what PDI class is type A for muscle attachments

A

PDI class I or II

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15
Q

what PDI class is type B for muscle attachments

A

PDI class I or II

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16
Q

what PDI class is type C for muscle attachments

A

PDI class III

17
Q

what PDI class is type D for muscle attachments

A

PDI class IV

18
Q

what PDI class is type E for muscle attachments

A

PDI class IV

19
Q

what are the types for residual ridge morphology

A
  • type A: adequate vestibular depth, absence of tori, palatal morphology will resist movement of the denture
  • type B: posterior buccal vestibule lost, tuberosity/hamular notch poorly defined
  • type C: anterior labial vestibule lost, mobile anterior ridge, palatal vault offers little resistance to movement of denture
  • type D: anterior and posterior vestibules lost, tori interfere with posterior border of denture, hyperplastic and mobile anterior ridge
20
Q

what PDI class is type A for residual ridge morphology

A

PDI class I

21
Q

what PDI class is type B for residual ridge morphology

A

PDI class II

22
Q

what PDI class is type C for residual ridge morphology

A

PDI class III

23
Q

what PDI class is type D for residual ridge morphology

A
  • PDI class IV
24
Q

what are the classes for maxillomandibular relationship

A
  • class I: most favorable
  • class II: requires tooth position outside normal ridge and articulation for esthetics, phonetics and articulation
  • class III- requires tooth position outside normal ridge relation for esthetics, phonetics and articulation; possible anterior or posterior cross bite
25
Q

what are the PDI classes for class I maxillomandibular relationships

A

PDI class I, II, III, or IV

26
Q

what are the PDI classes for class II maxillomandibular relationships

A

PDI class III or IV

27
Q

what are the PDI classes for class III maxillomandibular relationships

A

PDI class III or IV

28
Q

describe class I maxillomandibular relationship

A

maxillomandibular relationship allows tooth position that has normal articulation with the teeth supported by the residual ridge

29
Q

describe the class II maxillomandibular relationships

A

-maxillomandibular relationship allows tooth position outside the normal ridge relation in order to attain phonetics and articulation
- anterior or posterior tooth position not supported by the residual ridge
- anterior vertical overlap that exceeds the principles of articulation

30
Q

describe the class III maxillomandibular relationship

A

skeletal class III relation

31
Q

describe the class IV complete edentulous patient

A
  • residual bone height: least vertical height of the mandible
  • class I, II, and III maxillomandibular relationship
  • residual ridge offers no ressitance to horizontal or vertical movement- maxilla
  • location of muscle attachments with significant influence on denture base stability and retention- mandible
32
Q

what are the parameters that increase complexity of treatment

A
  • conditions that require pre prosthetic surgery
  • limited interarch space
  • tongue anatomy
33
Q

what are the conditions that require pre prosthetic surgery and what PDI class are they

A
  • minor/major soft tissue procedures: PDI class III or IV
  • minor/major hard tissue procedures: PDI class III or IV
  • implant placment (simple)- no augmentation required: PDI class III
  • implants with bone graft- complex: PDI Class III or IV
  • correction of dentofacial deformities: PDI class III or IV
  • multiple extractions -> complete edentulism for immediate dentures: PDI CLass III or IV
34
Q

what is the number for limited interarch space and what PDI is this

A

18-20mm : PDI class III

35
Q

what are the type of tongue anatomy and what PDI are they

A
  • large ( occludes with interdental space) : PDI class III
    -hyperactive - with retracted position
36
Q

what are the modifiers for all PDI classifications that increase the complexity and classification level

A

-esthetic concerns/ challenges
- presence of TMD symptoms
- oral manifestations of systemic disease
- psychosocial factors
- maxillofacial defects
- ataxia
- refractory patient

37
Q

what is a refractory patient

A
  • a patient who has chronic complaints following appropriate therapy
  • they continue to have difficulty in achieving their treatment expectations despite the throughoughness or frequency of the tx provided

Advanced Restorative (16 decks)

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