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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
what are the PDI classes for class I maxillomandibular relationships
PDI class I, II, III, or IV
26
what are the PDI classes for class II maxillomandibular relationships
PDI class III or IV
27
what are the PDI classes for class III maxillomandibular relationships
PDI class III or IV
28
describe class I maxillomandibular relationship
maxillomandibular relationship allows tooth position that has normal articulation with the teeth supported by the residual ridge
29
describe the class II maxillomandibular relationships
-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
describe the class III maxillomandibular relationship
skeletal class III relation
31
describe the class IV complete edentulous patient
- 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
what are the parameters that increase complexity of treatment
- conditions that require pre prosthetic surgery - limited interarch space - tongue anatomy
33
what are the conditions that require pre prosthetic surgery and what PDI class are they
- 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
what is the number for limited interarch space and what PDI is this
18-20mm : PDI class III
35
what are the type of tongue anatomy and what PDI are they
- large ( occludes with interdental space) : PDI class III -hyperactive - with retracted position
36
what are the modifiers for all PDI classifications that increase the complexity and classification level
-esthetic concerns/ challenges - presence of TMD symptoms - oral manifestations of systemic disease - psychosocial factors - maxillofacial defects - ataxia - refractory patient
37
what is a refractory patient
- 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
38

Advanced Restorative (16 decks)

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