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Advanced Restorative > PDI Lecture Part II > Flashcards

PDI Lecture Part II Flashcards

1
Q

what are the 3 classifications for PDI

A
  • edentulous
  • partially edentulous
  • dentate
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2
Q

what are the 4 categories for each classification

A

class I - class IV

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3
Q

what are the 4 considerations in class 1 partial edentulism

A
  • location and extent of edentulous area
  • abutment condition
  • occlusion
  • residual ridge morphology
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4
Q

describe the location and extent of edentulous areas in class I partial edentulism

A
  • edentulous area confined to a single arch and may include:
  • anterior maxillary span that does not exceed 2 incisors
  • anterior mandibular span that does not exceed 4 missing incisors or
  • posterior span that does not exceed 2 premolars or 1 premolar and 1 molar
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5
Q

describe the abutment condition in class I partially edentulous patient

A

no need for pre prosthetic surgery

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6
Q

describe the occlusion in class I partially edentulous patient

A
  • no need for pre prosthetic therapy
  • class I molar and jaw relationships
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7
Q

what are the biomechanical considerations for partial fixed denture prosthesis

A
  • number of abutment teeth and number of missing teeth - simple vs complex
  • splinted or pier abutment
  • non-parallel abutments
  • combined anterior and posterior FDP
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8
Q

describe class I partial edentulism partially edentulous patient

A
  • 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
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9
Q

describe the location and extent of the edentulous area in class II partially edentulous patient

A
  • moderately compromised
  • both arches have edentulous spaces and 1 of the following
  • anterior maxillary span that does not exceed 2 incisors
  • anterior mandibular span that does not exceed 4 missing incisors
  • posterior span that does not exceed 2 premolars or 1 premolar and 1 molar
  • any missing canine (maxillary or mandibular)
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10
Q

describe the abutment condition in class II partially edentulous patient

A
  • moderately compromised
  • insufficient tooth structure to retain or support intracoronal or extracoronal restorations - 1 or 2 sextants
  • abutments in 1-2 sextants require localized adjunctive therapy
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11
Q

describe the occlusion in class II partially edentulous patient

A
  • moderately compromised
  • occlusion requires localized adjunctive therapy - enameloplasty- prematurities
  • class I molar and jaw relationships are seen
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12
Q

what is the most common FDP to replace more than two teeth with success

A

mandibular anterior FPD replacing 4 incisors

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13
Q

why does the mandibular anterior FPD replacing 4 incisors have a better prognosis than maxillary

A

direction of forces inward towards arch

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14
Q

what are the weakest potential abutments in a mandibular anterior FPD

A

lateral incisors and adjacent premolar

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15
Q

what is the optimal abutment in a mandibular anterior FPD

A

canines

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16
Q

what is the prognosis for maxillary FPDs supported by canines and why

A

decreased prognosis and higher stresses/forces

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17
Q

what is the PDI for replacing a missing canine

A

class II or higher

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18
Q

what are the considerations for replacing a canine

A
  • adjacent premolar and lateral incisor are weakest potential abutments
  • maxillary replacement- forces outside inter abutment axis and directed outward
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19
Q

what is the best option for replacing a missing canine

A

implant supported single crown

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20
Q

when are occlusal interferences produced

A

when FDP made to over erupted opposing dentition

21
Q

what is done to correct an occlusal plane

A
  • opposing tooth/teeth restored to correct occlusal plane
  • may require RCT; periodontal surgery; orthodontics; extraction
  • prevents occlusal interferences in restored dentition
22
Q

are tilted molars good abutments

A

no

23
Q

how are tilted molars prepared to be an abutment

A
  • mesial wall must be over reduced/overtapered
  • results in decreased resistance
24
Q

what may intrude on the path of insertion of a tilted molar

A
  • distal adjacent tooth may intrude on the path of insertion
  • mesial surface may need re-contouring or restoration or extraction or orthodontic uprighting
25
Q

what is the purpose of molar uprighting

A
  • places abutment in better position for preparation
  • distributes forced under loading through long axis of tooth - helps prevent/eliminate mesial bony defects
  • enables replacement of optimum occlusion
26
Q

what is the purpose of non rigid attachments for tilted molar abutments and and how is it prepared

A
  • allows slight movement - short span
  • keyway in distal of premolar to avoid intrusion of molar (mesial seating action)
  • must prepare box in distal of premolar preparation (to accomodate the female/keyway)
27
Q

what are the non-rigid connectors indications

A
  • pier abutment FPD
  • long span FPD with multiple abutments
  • non parallel abutments- tipped molar
28
Q

what does the custom incisal guide table do

A
  • provides a record of the incisal guidance that has been established with provisional restorations or a diagnostic wax-up
  • provides a record for the lab to create the desired anterior guidance in the produced prostheses
29
Q

what is the location and extent of the edentulous area in class III partially edentulous patient

A
  • substantially compromised
  • 1 or both arches; compromised support of abutment teeth
  • posterior maxillary or mandibular edentulous area more than 3 teeth or 2 molars
  • any edentulous area including anterior and posterior areas of 3 or more teeth
29
Q

what is the abutment condition in class III partially edentulous patient

A
  • substantially compromised/ fair prognosis
  • insufficient tooth structure or support intracoronal or extracoronal restorations - 3 sextants
  • more substantially localized adjunctive therapy - 3 sextants
30
Q

describe the occlusion on class III partially edentulous patient

A
  • substantially compromised
  • entire occlusion must be re-established but without any change in the occlusal vertical dimension
  • class II molar and jaw relationships are present
31
Q

what missing teeth would qualify a patient as class III partially edentulous patient

A
  • any edentulous areas including anterior and posterior areas of 3 or more teeth
  • maxillary canine and 2 contiguous teeth
32
Q

what is the location and extent of the edentulous area in class IV partially edentulous patient

A
  • severely compromised
  • any edentulous area or combination of edentulous areas requiring a high level of patient compliance
33
Q

what is the abutment condition of class IV partially edentulous patient

A
  • severely compromised
  • abutments in 4 or more sextants have insufficient tooth structure to retain or support intracoronal or extracoronal restorations
  • abutments in 4. or more sextants require extensive adjunctive therapy
  • abutments have guarded prognosis
34
Q

describe the occlusion in class IV partially edentulous patient

A
  • severely compromised
  • entire occlusion must be reestablished, including changes in the occlusal vertical dimension
  • class II division 2 or class III molar and jaw relationships are seen
35
Q

what the tooth condition for a class I dentate patient

A
  • no localized adjunctive therapy required
  • pathology that affects the coronal morphology of 3 or less teeth, one sextant
36
Q

what the occlusal scheme for a class I dentate patient

A
  • no pre prosthetic therapy required
  • contiguous, intact dental arches
  • class I molar and jaw relationships
37
Q

what is the tooth condition for class II dentate patient

A
  • insufficient tooth structure to retain or support intracoronal or extracoronal restorations - one sextant (pin retained core/post core)
  • pathology that affects the coronal morphology of.4 or more teeth in a sextant
  • pathology can be in 2 sextants and can be in opposing arches
  • teeth require localized adjunctive therapy for a single tooth or in a single sextant
38
Q

what is the occlusal scheme for a class II dentate patient

A
  • moderately compromised
  • occlusal scheme requires localized adjunctive therapy
  • enameloplasty on premature occlusal contacts
  • anterior guidance is intact
  • class I molar and jaw relationships
39
Q

what features make a dentate patient class II

A
  • 1 sextant exhibits 3 defective restorations with an esthetic component
  • additional variables of gingival architecture and individual tooth proportions increase the complexity of the clinical conditions
40
Q

describe the tooth condition for class III completely dentate patients

A
  • substantially compromised
  • insufficient tooth structure to retain or support intracoronal or extracoronal restoration - 2 sextants
  • pathology that affects the coronal morphology of 4 or more teeth in 3 or more sextants
  • pathology can be in 3 sextants in the same arch and/or in opposing arches
  • teeth require more substantial localized adjunctive therapy for teeth in 2 sextants
41
Q

describe the occlusal scheme for class III completely dentate patients

A
  • substantially compromised
  • requires major therapy to maintain the entire occlusal scheme without any change in the occlusal vertical dimension
42
Q

describe the tooth condition for class IV completely dentate patient

A
  • insufficient tooth structure to retain or support intracoronal or extracoronal restorations - 3 or more sextants
  • pathology affects coronal morphology of more than or 4 teeth in all sextants
  • teeth in more than or 4 sextants require extensive adjunctive therapy
43
Q

describe the occlusal scheme for class IV dentate pt

A
  • severely compromised
  • occlusal scheme requires major therapy to re establish the entire occlusal scheme including any changes in the occlusal vertical dimension
  • class II division 2 malocclusion
  • class III molar and jaw relationships
44
Q

what are the modifiers for all PDI classifications

A
  • esthetic concerns/challenges
  • presence of TMD symptoms
  • oral manifestations of systemic disease
  • psychosocial factors
  • maxillofacial defects
  • ataxia
  • refractory patient
45
Q

the higher classification has a direct impact on:

A

the difficulty of the provided treatment and the prognosis of the treatment

46
Q

comprehensive evaluation and assessment of all necessary parameters to help in:

A

diagnosis, treatment and prognosis

47
Q
A

Advanced Restorative (17 decks)

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