PDI Flashcards
PDI:
Prosthedontic Diagnostic Index
What are the potential benefits of the PDI System? (7)
- improved intraoperator consistency
- improved professional communication
- insurance reimbursement commensurate with complexity of care
- an improved screening tool for dental school admission clinics
- standardized criteria for outcomes assessment and research
- enhanced diagnostic consistency
- a simplified aid in the decision-making process associated with referral
What is the diagnostic criteria to determine the classification for complete edentulism?
- bone height (mandibular)
- residual ridge morphology (maxilla)
- muscle attachments (mandibular)
- maxillomandibular relation
According to the classification system for complete edentulism-
“Ideal or minimally compromised”
Class I
According to the classification system for complete edentulism-
“Moderately compromised”
Class II
According to the classification system for complete edentulism-
“Substantially compromised”
Class III
According to the classification system for complete edentulism-
“Severely Compromised”
Class IV
What is the diagnostic criteria to determine the classification for partial edentulism?
- Abutment condition
- Occlusal scheme
- Location/extent of edentulous areas
- Residual ridge
According to the classification system for partial edentulism-
“Ideal or minimally compromised”
Class I
According to the classification system for partial edentulism-
“Moderately compromised”
Class II
According to the classification system for partial edentulism-
“Substantially compromised”
Class III
According to the classification system for partial edentulism-
“Severely compromised”
Class IV
A type A residual ridge puts patients in the ____ category of partial edentulism
class I
In class II partial edentulism, the {location and extent of the edentulous area} is:
Moderately compromised
Most common FDP to replace more than 2 teeth with success:
Mandibular anterior FDP replacing 4 incisors
T/F: A maxillary anterior FPD has a better prognosis than a mandibular FPD:
False- mandibular FPD has a better prognosis
What are the weakest posterior abutments for a mandibular anterior FPD?
adjacent premolar and lateral incisor (if replacing canine)
For a replacement of a maxillary missing canine, best rested with:
implant-supported single crown
_____ are produced when FPD made to over-erupted opposing dentition
Occlusal interferences
Tilted molar abutments are considered:
poor abutments
- places abutment in better position for preparation
- distributes forces under landing through long axis of tooth (helps prevent/eliminate mesial bony defects)
- enables replacement of optimum occlusion
molar uprighting
Provides a record of the incisal guidance that has been established with provisional restorations or a diagnostic wax-up:
Custom incisal guide
Provides a record for the alb to create the desired anterior guidance in the reduced prostheses:
Custom incisal guide
In a class III partial edentulism patient, the location and extent of the edentulous area is:
substantially compromised
PDI Classification?
- partial edentulism ideal or minimally compromised
- complete edentulism ideal or minimally compromised
Class I
PDI Classification?
- partial edentulism moderately compromise
- complete edentullism moderately compromised
Class II
PDI Classification?
- partial edentulism substanially compromised
- complete edentulism substantially compromised
Class III
PDI Classification?
- partial edentulism severely compromised
- complete edentulism severely compromised
Class IV
Modifiers for all classifications: Increase complexity and classification level: (7)
- esthetic concerns/ challenges
- presence of TMD symptoms
- oral manifestations of systemic disease
- psychosocial factors
- maxillofacial defects
- ataxia
- refractory patient
PDI Classification?
- edentulous area confined to a single arch
- anterior maxillary span that does not exceed 2 incisors
Class I
PDI Classification?
- edentulous area confined to a single arch
- anterior mandibular span that does not exceed 4 missing incisors
Class I
PDI Classification?
- edentulous area confined to a single arch
- posterior span that does not exceed 2 premolars or 1 premolar + 1 molar
class I
PDI Classification?
abutment condition- no need for pre-prosthetic therapy
Class I
PDI Classification?
Occlusion:
- non need for pre-prosthetic therapy
- class I molar and jaw relationships
Class I
Biomechanical considerations for partial fixed dental prosthesis (FDP): (4)
- number of abutment teeth and number of missing teeth (simple vs. complex)
- splinted or pier abutment
- non-parallel abutments
- combined anterior and posterior FDP
- Ideal or minimally compromised edentulous area, abutment condition, and occlusion
- There is a single edentulous area in one sextant
- The residual ridge is considered type A
Class I partial edentulism
PDI Classification?
- Both arches have edentulous spaces
- Anterior maxillary span that does not exceed 4 missing incisors
Class II partial edentulism
PDI Classification?
- Both arches have edentulous spaces
- Anterior mandibular span that does not exceed 4 missing incisors
Class II partial edentulism
PDI Classification?
- Both arches have edentulous spaces
- Posterior span that does not exceed 2 premolars or 1 premolar + 1 molar
Class II partial edentulism
PDI Classification?
- Both arches have edentulous spaces
- Any missing canine maxillary or mandibular
Class II partial edentulism
PDI Classification?
PE
Abutment condition: insufficient tooth structure to retain or support intracoronal or extracoronal restorations - 1 or 2 sextants
Class II partial edentulism
PDI Classification?
PE
Abutment condition: abutments in 1-2 sextants require localized adjunctive therapy (minor)
Class II partial edentulism
PDI Classification?
PE
Occlusion:
- occlusion requires localized adjunctive therapy (enameloplasty- prematurities)
Class I molar and jaw relationships are seen
Class II partial edentulism
PDI Classification?
- 1 or both arches; compromised support of abutment teeth
Class III Partial edentulism
PDI Classification?
- Posterior maxillary or mandibular edentulous area greater than 3 teeth or 2 molars
Class III Partial Edenulism
PDI Classification?
- Any edentulous area including anterior posterior areas of 3 or more teeth
Class III partial edentulism
PDI Classification?
PE:
Abutment condition: Insufficient tooth structure to retain or support inctracoronal or extracoronal restorations - 3 sextants
Class III partial edentulism
PDI Classification?
PE:
Abutment condition: more substantial localized adjunctive therapy (perio, endo, ortho treatments) - 3 sextants
Class III partial edentulism
PDI Classification?
PE
Occlusion: entire occlusion must be re-established but without any change in OVD
Class III partial edentulism
PDI Classification?
PE
Occlusion: class II molar and jaw relationships
Class III partial edentulism
patient is missing maxillary canine and 2 continuous teeth:
Class III partially edentulous
PDI Classification?
Any edentulous area or combination of edentulous areas requiring a high level of patient compliance
Class IV partial edentulism
PDI Classification?
PE
Abutment condition:
- abutments in 4 or more sextants have insufficient tooth structure to retain or support intracoronal or extracoronal restorations
Class IV partial edentulism
PDI Classification?
PE
Abutment condition:
- abutments in 4 or more sextants require extensive adjunctive therapy (periodontal, endodontic or orthodontic procedures)
Class IV partial edentulism
PDI Classification?
PE
Abutment condition:
- abutments have guarded prognosis
Class IV partial edentulism
PDI Classification?
PE
Occlusion:
Entire occlusion must be re-established, including changes in the OVD
Class IV partial edentulism
PDI Classification?
PE
Occlusion:
Class II division 2 and Class III molar and jaw relationships are seen
Class IV partial edentulism
What is the diagnostic criteria for a completely dentate patient?
- tooth condition
- occlusal scheme
PDI? Dentate patient
- no localized adjunctive therapy required
- pathosis that affects the coronal morphology of three or less teeth; one sextant
Class I dentate patient
PDI? Dentate patient
- no pre-prosthetic therapy required
- contiguous intact dental arches
- class I molar and jaw relationships
Class I dentate patient
A single anterior crown on a fully dentate patient:
Class I Dentate`
PDI? Dentate patient
- insufficient tooth structure to retain or support intra or extracoronal restorations- one sextant (pin-retained core/ post-core)
Class II dentate
PDI? Dentate patient
- Pathosis that affects coronal morphology of 4 or more teeth in a sextant
Class II dentate
PDI? Dentate patient
- Pathosis can be in 2 sextants and can be in 4 opposing arches
Class II dentate
PDI? Dentate patient
- Teeth require localized adjunctive therapy (periodontal, endodontic, or orthodontic procedures for a single tooth or in a single sextant)
class II dentate
PDI? Dentate patient
Occlusion:
- occlusal scheme requires localized adjunctive therapy (enameloplasty on premature occlusal contact)
Class II dentate
PDI? Dentate patient
occlusion:
- anterior guidance is in tact
- class I molar and jaw relationships
Class II dentate
PDI? Dentate patient
- Insufficient tooth structure to retain or support intracoronal or extracoronal restoration - 2 sextants
Class III dentate
PDI? Dentate patient
- Pathosis that affects the coronal morphology of 4 or more teeth in 3 or more sextants
Class III dentate
PDI? Dentate patient
- Pathosis can be in 3 sextants in the same arch and/ or in opposing arches
Class III dentate
PDI? Dentate patient
- Teeth require more substantial localized adjunctive therapy (periodontal, endodntic, or orthodontic procedures for teeth in two sextants)
Class III dentate
PDI? Dentate patient
Occlusion: occlusal scheme requires major therapy to maintain the entire occlusal scheme without any changes in OVD:
Class III dentate
PDI? Dentate patient
- insufficient tooth structure to retain or support intra or extracoronal restorations- 3 or more sextants
Class IV Dentate
PDI? Dentate patient
- pathosis affects coronal morphology of greater than or equal to 4 teeth in all sextants
Class IV dentate
PDI? Dentate patient
- Teeth in greater than or equal to 4 sextants require extensive adjunctive therapy
Class IV dentate
PDI? Dentate patient
- occlusal scheme requires major therapy to re-establish the entire occlusal scheme including any changes in OVD
Class IV dentate
PDI? Dentate patient
- Class II division II malocclusion
- Class III molar and jaw relationships
Class IV dentate
