PDI

Question 1

PDI:

Answer 1

Prosthodontics Diagnostic Index

Question 2

What are the potential benefits of the PDI system? (7)

Answer 2

1. improved intraoperator consistency
2. improved professional communication
3. insurance reimbursement commensurate with complexity of care
4. improved screen tool for dental school admission clinics
5. standardized criteria for outcomes assessment & research
6. enhanced diagnostic consistency
7. simplified aid in the decision-making processes associated with referral

Question 3

What is the diagnostic criteria to determine the classification for complete edentualism?

Answer 3

1. bone height (mandibular)
2. residual ridge morphology (maxilla)
3. muscle attachments (mandibular)
4. maxillomandibular relation

Question 4

According to the classification system for complete edentualism:

“ideal or minimally compromised”

Answer 4

Class I

Question 5

According to the classification system for complete edentualism:

“moderately compromised”

Answer 5

Class II

Question 6

According to the classification system for complete edentualism:

“Substantially compromised”

Answer 6

Class III

Question 7

According to the classification system for complete edentualism:

“Severely compromised”

Answer 7

Class IV

Question 8

What is the diagnostic criteria to determine the classification for partial edentulism?

Answer 8

1. abutment condition
2. occlusal scheme
3. location/extent edentulous areas
4. residual ridge

Question 9

According to the classification system for partial edentualism:

“ideal or minimally compromised”

Answer 9

Class I

Question 10

According to the classification system for partial edentualism:

“moderately compromised”

Answer 10

Class II

Question 11

According to the classification system for partial edentualism:

“Substantially compromised”

Answer 11

Class III

Question 12

According to the classification system for partial edentualism:

“Severely compromised”

Answer 12

Class IV

Question 13

A type A residual ridge puts patients in the _____ of partial edentulism

Answer 13

Class I

Question 14

In class II partial edentulism, the {location & extent of the edentulous area} is:

Answer 14

moderately compromised

Question 15

Most common FPD to replace more than teeth with success:

Answer 15

Mandibular anterior FPD replacing 4 incisors

Question 16

T/F: A maxillary anterior FPD has a better prognosis than a mandibular anterior FPD

Answer 16

False- mandibular anterior FPD has a better prognosis

Question 17

What are the weakest posterior abutments for a mandibular anterior FPD?

Answer 17

Adjacent premolar & lateral incisor (if replacing canine)

Question 18

For replacement of a missing maxillary canine, best restored with:

Answer 18

implant-supported single crown

Question 19

____ is produced when FPD made to over-erupted opposing dentition

Answer 19

Occlusal interferences

Question 20

Tilted molars abutments are considered:

Answer 20

poor abutments

Question 21

-places abutment in better position for preparation
-distributes forces under loading through long axis of tooth (helps prevent/eliminate mesial bony defects)
-enables replacement of optimum occlusion

Answer 21

Molar uprighting

Question 22

Provides a record of incisal guidance that has been established with provisional restorations or a diagnostic wax:

Answer 22

Custom incsial guide

Question 23

Provides a record for the lab to create the desired anterior guidance in the produced prosthesis:

Answer 23

Custom incisal guide

Question 24

In class II partial edentulism patient, the location and extend of the edentulous area is:

Answer 24

substantially compromised

Question 25

PDI Classification? -Partial edentulism ideal or minimally compromised -Complete edentulism ideal or minimally compromised

Answer 25

Class I

Question 26

PDI Classification? -Partial edentulism moderately compromised -Complete edentulism moderately compromised

Answer 26

Class II

Question 27

PDI Classification? -Partial edentulism substantially compromised -Complete edentulism substantially compromised

Answer 27

Class III

Question 28

PDI Classification? -partial edentulism severely compromised -complete edentulism severely compromised

Answer 28

Class IV

Question 29

Modifiers for all classifications- increased complexity and classification level: (7)

Answer 29

1. esthetic concerns/challenges 2. presence of TMD symptoms 3. oral manifestations of systemic disease 4. psychosocial factors 5. maxillofacial defects 6. ataxia 7. refractory patient

Question 30

PDI Classification? -Edentulous area confined to a single arch -anterior maxillary span that does not exceed 2 incisors

Answer 30

Class I

Question 31

PDI Classification? -Edentulous area confined to a single arch -anterior mandibular span that does not exceed 4 missing incisors

Answer 31

Class I

Question 32

PDI Classification? -Edentulous area confined to a single arch -posterior span that does not exceed 2 premolars or 1 premolar + 1 molar

Answer 32

Class I

Question 33

PDI Classification? -Abutment condition: no need for pre-prosthetic therapy

Answer 33

Class I

Question 34

PDI Classification? -Occlusion: no need for pre-prosthetic therapy -Class I molar and jaw relationships

Answer 34

Class I

Question 35

Biomechanical considerations for partial fixed dental prosthesis (FDP): (4)

Answer 35

1. Number of abutment teeth & number of missing teeth (simple vs. complex) 2. Splinted or pier abutment 3. Non-parallel abutments 4. Combined anterior & posterior FDP

Question 36

-Ideal or minimally compromised edentulous area, abutment condition and occlusion -there is a single edentulous area in 1 sextant -the residual ridge is considered type A

Answer 36

Class I partial edentulism

Question 37

PDI Classification? -Both arches have edentulous spaces -anterior maxillary span that does not exceed 4 missing incisors

Answer 37

Class II partial edentulism

Question 38

PDI Classification? -Both arches have edentulous spaces -anterior mandibular span that does not exceed 4 missing incisors

Answer 38

Class II partial edentulism

Question 39

PDI Classification? -Both arches have edentulous spaces -posterior span that does not exceed 2 premolars or 1 premolar + 1 molar

Answer 39

Class II partial edentulism

Question 40

PDI Classification? -Both arches have edentulous spaces -Any missing canine (maxillary & mandibular)

Answer 40

Class II partial edentulism

Question 41

PDI Classification? PE Abutment condition: insufficient tooth structure to retain or support intracoronal or extracoronal restorations- 1 or 2 sextnats

Answer 41

Class II partial edentulism

Question 42

PDI Classification? PE Abutment condition: abutments in 1-2 sextants require localized adjunctive therapy (minor)

Answer 42

Class II partial edentulism

Question 43

PDI Classification? PE Occlusion: occlusion requiers localized adjunctive therapy (enameloplasty - prematurities) - Class I molar and jaw relationships are seen

Answer 43

Class II partial edentulism

Question 44

PDI Classification? -1 or both arches; compromised support of abutment teeth

Answer 44

Class II partial edentulism

Question 45

PDI Classification? -Posterior maxillary or mandibular edentulous area greater than 3 teeth or 2 molars

Answer 45

Class III partial edentulism

Question 46

PDI Classification? -any edentulous area including anterior and posterior areas of 3 or more teeth

Answer 46

Class III partial edentulism

Question 47

PDI Classification? PE Abutment condition: insufficient tooth structure to retain or support intracoronal or extracoronal restorations - 3 sextants

Answer 47

Class III partial edentulism

Question 48

PDI Classification? PE Abutment condition: More substantial localized adjunctive therapy (perio, endo, ortho treatments) - 3 sextants

Answer 48

Class III partial edentulism

Question 49

PDI Classification? PE Occlusion: entire occlusion must be re-established, but without any change in OVD

Answer 49

Class III partial edentulism

Question 50

PDI Classification? PE Occlusion: Class II molar & jaw relationship

Answer 50

Class III partial edentulism

Question 51

PDI Classification? Patient is missing maxillary canine and two contiguous teeth

Answer 51

Class III partial edentulism

Question 52

PDI Classification? -any edentulous area or combination of edentulous areas requiring a high level of patient compliance

Answer 52

Class IV partial edentulism

Question 53

PDI Classification? PE Abutment condition: abutments in 4 or more sextants have insufficient tooth structure to retain or support intracoronal or extracoronal restorations

Answer 53

Class IV partial edentulism

Question 54

PDI Classification? PE Abutment condition: Abutments in 4 or more sextants require extensive adjunctive therapy (periodontal, endodontic, or orthodontic procedures)

Answer 54

Class IV partial edentulism

Question 55

PDI Classification? PE Abutment condition: Abutments have guarded prognosis

Answer 55

Class IV partial edentulism

Question 56

PDI Classification? PE Occlusion: Entire occlusion must be re-established including changes the OVD

Answer 56

Class IV partial edentulism

Question 57

PDI Classification? PE Occlusion: Class II division 2 and Class III molar & jaw relationships are seen

Answer 57

Class IV partial edentulism

Question 58

What is the diagnostic criteria for a completely dentate patient:

Answer 58

1. tooth condition 2. occlusal scheme

Question 59

PDI Classification? Dentate patient: -no localized adjunctive therapy required -pathosis that effects the coronal morphology of 3 or less teeth- 1 sextant

Answer 59

Class I dentate

Question 60

PDI Classification? Dentate patient: -no pre-prosthetic therapy required -contiguous, intact dental arches -class I molar and jaw relationships

Answer 60

Class I dentate

Question 61

A single anterior crown on a fully dentate patient:

Answer 61

Class I dentate

Question 62

PDI Classification? Dentate patient: -insufficient tooth structure to retain or support intra- or extracoronal restorations- 1 sextant (pin retained core/post-core)

Answer 62

Class II dentate

Question 63

PDI Classification? Dentate patient: -pathosis that affects coronal morphology of 4 or more teeth in a sextant

Answer 63

Class II dentate

Question 64

PDI Classification? Dentate patient: -pathosis can be in 2 sextants and can be in 4 opposing arches

Answer 64

Class II dentate

Question 65

PDI Classification? Dentate patient: -Teeth require localized adjunctive therapy (periodontal, endodontic, or orthodontic procedures) for a single tooth or in a single sextant

Answer 65

Class II dentate

Question 66

PDI Classification? Dentate patient: Occlusion- occlusal scheme requires localized adjunctive therapy (enameloplasty on premature contacts)

Answer 66

Class II dentate

Question 67

PDI Classification? Dentate patient: Occlusion- anterior guidance is intact -Class I molar & jaw relationships

Answer 67

Class II dentate

Question 68

PDI Classification? Dentate patient: -insufficient tooth structure to retain or support intracoronal or extracoronal restoration - 2 sextants

Answer 68

Class III dentate

Question 69

PDI Classification? Dentate patient: -pathosis that affects the coronal morphology of 4 or more teeth in 3 or more sextants

Answer 69

Class III dentate

Question 70

PDI Classification? Dentate patient: -pathosis can be in 3 sextants in the same arch and/or in opposing arches

Answer 70

Class III dentate

Question 71

PDI Classification? Dentate patient: -teeth require more substantial localized adjunctive therapy (periodontal, endodontic or orthodontic procedures) for teeth in 2 sextants

Answer 71

Class III dentate

Question 72

PDI Classification? Dentate patient: Occlusion- occlusal scheme requires major therapy to maintain the entire occlusal scheme without any changes in OVD:

Answer 72

Class III dentate

Question 73

PDI Classification? Dentate patient: -insufficient tooth structure to retain or support intra- or extracoronal restorations- 3 or more sextants

Answer 73

Class IV dentate

Question 74

PDI Classification? Dentate patient: -pathosis affects coronal morphology of greater than or equal to 4 teeth in all sextants

Answer 74

Class IV dentate

Question 75

PDI Classification? Dentate patient: -teeth in greater than or equal to 4 sextants require extensive adjunctive therapy

Answer 75

Class IV dentate

Question 76

PDI Classification? Dentate patient: -Occlusal scheme requires major therapy to re-establish the entire occlusal scheme including any changes in the OVD

Answer 76

Class IV dentate

Question 77

PDI Classification? Dentate patient: -Class II division II malocclusion -Class molar & jaw relationships

Answer 77

Class IV dentate