PDI Flashcards
PDI:
Prosthodontics 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
- improved screen tool for dental school admission clinics
- standardized criteria for outcomes assessment & research
- enhanced diagnostic consistency
- simplified aid in the decision-making processes associated with referral
What is the diagnostic criteria to determine the classification for complete edentualism?
- bone height (mandibular)
- residual ridge morphology (maxilla)
- muscle attachments (mandibular)
- maxillomandibular relation
According to the classification system for complete edentualism:
“ideal or minimally compromised”
Class I
According to the classification system for complete edentualism:
“moderately compromised”
Class II
According to the classification system for complete edentualism:
“Substantially compromised”
Class III
According to the classification system for complete edentualism:
“Severely compromised”
Class IV
What is the diagnostic criteria to determine the classification for partial edentulism?
- abutment condition
- occlusal scheme
- location/extent edentulous areas
- residual ridge
According to the classification system for partial edentualism:
“ideal or minimally compromised”
Class I
According to the classification system for partial edentualism:
“moderately compromised”
Class II
According to the classification system for partial edentualism:
“Substantially compromised”
Class III
According to the classification system for partial edentualism:
“Severely compromised”
Class IV
A type A residual ridge puts patients in the _____ of partial edentulism
Class I
In class II partial edentulism, the {location & extent of the edentulous area} is:
moderately compromised
Most common FPD to replace more than teeth with success:
Mandibular anterior FPD replacing 4 incisors
T/F: A maxillary anterior FPD has a better prognosis than a mandibular anterior FPD
False- mandibular anterior FPD has a better prognosis
What are the weakest posterior abutments for a mandibular anterior FPD?
Adjacent premolar & lateral incisor (if replacing canine)
For replacement of a missing maxillary canine, best restored with:
implant-supported single crown
____ is produced when FPD made to over-erupted opposing dentition
Occlusal interferences
Tilted molars abutments are considered:
poor abutments
-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
Molar uprighting
Provides a record of incisal guidance that has been established with provisional restorations or a diagnostic wax:
Custom incsial guide
Provides a record for the lab to create the desired anterior guidance in the produced prosthesis:
Custom incisal guide
In class II partial edentulism patient, the location and extend 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 compromised
-Complete edentulism moderately compromised
Class II
PDI Classification?
-Partial edentulism substantially compromised
-Complete edentulism substantially compromised
Class III
PDI Classification?
-partial edentulism severely compromised
-complete edentulism severely compromised
Class IV
Modifiers for all classifications- increased 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: no 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 & number of missing teeth (simple vs. complex)
- Splinted or pier abutment
- Non-parallel abutments
- Combined anterior & posterior FDP
-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
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 & mandibular)
Class II partial edentulism
PDI Classification?
PE
Abutment condition: insufficient tooth structure to retain or support intracoronal or extracoronal restorations- 1 or 2 sextnats
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 requiers 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 II partial edentulism
PDI Classification?
-Posterior maxillary or mandibular edentulous area greater than 3 teeth or 2 molars
Class III partial edentulism
PDI Classification?
-any edentulous area including anterior and posterior areas of 3 or more teeth
Class III partial edentulism
PDI Classification?
PE
Abutment condition: insufficient tooth structure to retain or support intracoronal 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 & jaw relationship
Class III partial edentulism
PDI Classification?
Patient is missing maxillary canine and two contiguous teeth
Class III partial edentulism
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 the OVD
Class IV partial edentulism
PDI Classification?
PE
Occlusion: Class II division 2 and Class III molar & jaw relationships are seen
Class IV partial edentulism
What is the diagnostic criteria for a completely dentate patient:
- tooth condition
- occlusal scheme
PDI Classification?
Dentate patient:
-no localized adjunctive therapy required
-pathosis that effects the coronal morphology of 3 or less teeth- 1 sextant
Class I dentate
PDI Classification?
Dentate patient:
-no pre-prosthetic therapy required
-contiguous, intact dental arches
-class I molar and jaw relationships
Class I dentate
A single anterior crown on a fully dentate patient:
Class I dentate
PDI Classification?
Dentate patient:
-insufficient tooth structure to retain or support intra- or extracoronal restorations- 1 sextant (pin retained core/post-core)
Class II dentate
PDI Classification?
Dentate patient:
-pathosis that affects coronal morphology of 4 or more teeth in a sextant
Class II dentate
PDI Classification?
Dentate patient:
-pathosis can be in 2 sextants and can be in 4 opposing arches
Class II dentate
PDI Classification?
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 Classification?
Dentate patient:
Occlusion- occlusal scheme requires localized adjunctive therapy (enameloplasty on premature contacts)
Class II dentate
PDI Classification?
Dentate patient:
Occlusion- anterior guidance is intact
-Class I molar & jaw relationships
Class II dentate
PDI Classification?
Dentate patient:
-insufficient tooth structure to retain or support intracoronal or extracoronal restoration - 2 sextants
Class III dentate
PDI Classification?
Dentate patient:
-pathosis that affects the coronal morphology of 4 or more teeth in 3 or more sextants
Class III dentate
PDI Classification?
Dentate patient:
-pathosis can be in 3 sextants in the same arch and/or in opposing arches
Class III dentate
PDI Classification?
Dentate patient:
-teeth require more substantial localized adjunctive therapy (periodontal, endodontic or orthodontic procedures) for teeth in 2 sextants
Class III dentate
PDI Classification?
Dentate patient:
Occlusion- occlusal scheme requires major therapy to maintain the entire occlusal scheme without any changes in OVD:
Class III dentate
PDI Classification?
Dentate patient:
-insufficient tooth structure to retain or support intra- or extracoronal restorations- 3 or more sextants
Class IV dentate
PDI Classification?
Dentate patient:
-pathosis affects coronal morphology of greater than or equal to 4 teeth in all sextants
Class IV dentate
PDI Classification?
Dentate patient:
-teeth in greater than or equal to 4 sextants require extensive adjunctive therapy
Class IV dentate
PDI Classification?
Dentate patient:
-Occlusal scheme requires major therapy to re-establish the entire occlusal scheme including any changes in the OVD
Class IV dentate
PDI Classification?
Dentate patient:
-Class II division II malocclusion
-Class molar & jaw relationships
Class IV dentate
