PDI Classification Flashcards
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Questions and Answers

What does PDI stand for?

  • Public Dental Inventory
  • Prosthodontic Diagnostic Index (correct)
  • Private Dental Initiative
  • Prosthetic Development Index

    • A PDI patient may fall into how many classes?

  • 4
  • 3 (correct)
  • 2
  • 1

    • PDI class 1 is more complex than PDI class 4.

    False

    What is the primary factor that PDI uses to classify patients?

    <p>Existing clinical condition</p> Signup and view all the answers

    What is the most common reason a dentist must refer a prosthodontic case?

    <p>Beyond our expertise</p> Signup and view all the answers

    Class 1-4 stand for: __________ compromised cases

    <p>compromised</p> Signup and view all the answers

    Match the classes with their corresponding levels of compromise:

    <p>Class 1 = Mildly compromised Class 2 = Moderately compromised Class 3 = Substantially compromised Class 4 = Severely compromised</p> Signup and view all the answers

    In the completely edentulous patient, PDI classification is based on how many diagnostic criteria?

    <p>4</p> Signup and view all the answers

    What is assessed via a panoramic X-ray for mandibular bone height?

    <p>Bone height</p> Signup and view all the answers

    What PDI class corresponds to limited interarch space of 18-20 mm?

    <p>3</p> Signup and view all the answers

    A hyperactive retracted tongue is classified as PDI class 3.

    <p>True</p> Signup and view all the answers

    A normal dentist typically treats PDI class __ and __.

    <p>1, 2</p> Signup and view all the answers

    How many factors are used to assess partial edentulism PDI?

    <p>4</p> Signup and view all the answers

    What is the PDI class of a completely dentate patient who has 4 or more pathologically affected teeth in 3+ sextants?

    <p>Class 3</p> Signup and view all the answers

    Class 4 PDI in a fully dentate patient indicates the need for major therapy.

    <p>True</p> Signup and view all the answers

    What is the maximum number of incisors in the maxilla for class 1 PDI?

    <p>2</p> Signup and view all the answers

    What is the maximum number of incisors in the mandible for class 1 PDI?

    <p>4</p> Signup and view all the answers

    What is the maximum permissible number of posterior teeth in class 1 PDI?

    <p>2 premolars or 1 premolar and 1 molar</p> Signup and view all the answers

    What is the definition of partial edentulism?

    <p>missing # 8 and 9</p> Signup and view all the answers

    What does partial edentulism with one premolar and one molar mean?

    <p>PDI</p> Signup and view all the answers

    What is the abutment condition in class 1 PDI?

    <p>Abutments are sound, no need for pre-prosthetic surgery.</p> Signup and view all the answers

    What is the occlusal scheme for class 1 PDI?

    <p>Ideal or minimally compromised</p> Signup and view all the answers

    In class 2 PDI, what is the maximum number of maxillary incisors that can be missing?

    <p>2</p> Signup and view all the answers

    What does class 2 PDI indicate about the abutment condition?

    <p>Teeth cannot withstand a restoration in one or two sextants.</p> Signup and view all the answers

    What is the residual ridge condition in class 2 PDI?

    <p>Class 1 complete edentulous.</p> Signup and view all the answers

    What is the key feature of class 3 partial edentulism?

    <p>Can now be in one or more arches.</p> Signup and view all the answers

    What is the abutment condition in class 3 PDI?

    <p>Cannot retain an intra or extra coronal restoration.</p> Signup and view all the answers

    What is the occlusal scheme for class 3 PDI?

    <p>Class 2 jaw relationships.</p> Signup and view all the answers

    A class 2 jaw is now a minimum class ___ PDI in a partial edentulous patient.

    <p>3</p> Signup and view all the answers

    What is the condition of the residual ridge in class 3 partial edentulous patient?

    <p>Class 1 complete edentulous.</p> Signup and view all the answers

    What is the condition of the residual ridge for class 4 partial edentulous?

    <p>Very extensive.</p> Signup and view all the answers

    Any edentulous area with a guarded prognosis automatically classifies as class ___ PDI.

    <p>4</p> Signup and view all the answers

    What class PDI is given to any patient with a congenital maxillofacial defect?

    <p>4</p> Signup and view all the answers

    What abutment condition is identified in class 4?

    <p>Cant maintain an intra or extra coronal restoration.</p> Signup and view all the answers

    A class 4 PDI partial edentulous will be a class ____ jaw or a change in what?

    <p>3, occlusal vertical dimension.</p> Signup and view all the answers

    Class 2 division 2 is classified as a class ___ PDI in partial edentulism.

    <p>4</p> Signup and view all the answers

    What is the residual ridge condition in partial edentulism PDI class 4?

    <p>Class 1 fully edentulous.</p> Signup and view all the answers

    What class PDI is indicated for a severe oral manifestation of systemic disease or a refractory partially edentulous patient?

    <p>4</p> Signup and view all the answers

    Study Notes

    PDI Classification Overview

    • PDI stands for Prosthodontic Diagnostic Index.
    • Patients are classified into three categories: fully edentulous, partially edentulous, and completely dentate.

    Complexity of Cases

    • PDI complexity ranges from class 1 (least complex) to class 4 (most complex).
    • Class 1 indicates mild compromise; class 4 indicates severe compromise.
    • Clinical conditions inform the complexity of treatment cases.

    Referral Criteria

    • 95% of prosthodontic cases may exceed a general dentist's expertise.
    • Common reasons for referrals include procedural complexity, medical conditions, equipment requirements, patient preferences, and practitioner skills.

    Edentulous Patient Classification

    • Fully edentulous patients are classified based on four criteria: maxillo-mandibular relationship, residual ridge morphology, bone height, and muscle attachment.
    • Bone height measurement focuses primarily on the mandibular area.

    Residual Ridge Morphologies

    • Maxillary residual ridge morphology Types A-D:
      • Type A: Intact vestibules, well-defined tuberosity, no tori.
      • Type B: Lost vestibules, poorly defined tuberosity, rounded tori may be present.
      • Type C: Lost vestibules, minimal resistance from palate, interfered by coronoid process.
      • Type D: No vestibule, poorly supportive anterior ridge, and tori interference.

    Muscle Attachment Types

    • Muscle attachment impacts PDI classification:
      • Class A: No muscle impingement.
      • Class B: Loss in labial attachment.
      • Class C: Loss of labial/lingual attachments.
      • Class D: Loss of attachments except posterior lingual.
      • Class E: Complete loss of vestibule.

    Modifying Variables in Edentulism

    • Variables affecting difficulty include tongue size, interarch space, pathology, systemic diseases, and TMD.
    • Limited interarch space of 18-20 mm is classified as PDI class 3.

    Complete Dentate Patient Classification

    • Classified based on occlusal scheme and the condition of existing teeth.
    • Class 1: Good condition with minimal compromise; no adjustments needed.
    • Class 2: Adjunctive therapy required, anterior guidance intact.
    • Class 3: Significant pathology affects multiple sextants, requiring comprehensive treatment.

    Partial Edentulism Criteria

    • Partial edentulous patients assessed on location/extent of edentulous area, abutment condition, occlusal scheme, and residual ridge anatomy.
    • Class 1 has limitations on edentulous spans; Class 4 indicates extensive edentulous areas with guarded prognosis.

    Complex Cases and Prognosis

    • Class 3 and 4 cases often require major therapy with potential changes in occlusal vertical dimension.
    • Patients with severe systemic disease manifestations or refractory conditions are likely classified as class 4.

    Summary of PDI Classifications

    • Classifications serve to guide treatment decisions based on patient needs, anatomical considerations, and complexity of care required.
    • Understanding PDI is crucial for effectively planning and executing prosthodontic interventions.

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    Description

    Test your knowledge on the Prosthodontic Diagnostic Index with these flashcards. Learn about the different PDI classes, their definitions, and the complexities involved in patient classification. Perfect for students and professionals in dentistry.

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