38 Questions
Which rule states that the extent of the modification is not considered, only the number of additional edentulous areas?
Applegate Rule 7
Under the classification system, how is a single bounded saddle described?
Class III
How many modification areas can be included in Class IV arches?
No modification areas
Which rule dictates that if there are any other edentulous spaces, the denture falls into one of the other classes excluding Class IV?
Applegate Rule 7
Why does Class I refer to two edentulous areas and Class II refer to one according to the text?
Because of the principles of design
In Kennedy Class III Modification 1, what does the 'modification' specifically refer to?
Number of additional edentulous areas
What is a dental implant?
A prosthetic device made of alloplastic material(s) implanted into the oral tissues beneath the mucosal and/or periosteal layer and on or within the bone to provide retention and support for a fixed or removable dental prosthesis
Which of the following is NOT a contraindication for dental implant therapy?
Favorable regional anatomy
What is the purpose of classifying partially edentulous arches?
To visualize the type of partially edentulous arch and differentiate between tooth-supported and tooth- and tissue-supported removable partial dentures
Which of the following is NOT a requirement for an acceptable method of classifying partially edentulous arches?
It should recommend the optimal dental implant material
What is the goal of a universal classification system for partially edentulous arches?
To combine the best features of existing classification systems
Which statement about dental implants is TRUE according to the text?
Dental implants are considered adjuncts in fixed and removable therapy
According to the rules, if a third molar is missing and not to be replaced, how is it considered in the classification?
It is not considered in the classification
If a third molar is present and is to be used as an abutment, how is it considered in the classification?
It is considered in the classification
According to the rules, if a second molar is missing and is not to be replaced, how is it considered in the classification?
It is not considered in the classification
What determines the classification according to the rules?
The most posterior edentulous area (or areas)
How are edentulous areas other than those determining the classification referred to?
They are referred to as modifications and are designated by their number
According to the rules, what is not considered in the classification of modifications?
The extent of the modification
What is the definition of a partially edentulous patient?
An individual who has lost some of their natural teeth
What is a partial denture?
A prosthesis that replaces one or more, but not all, of the natural teeth and supporting structures
How is a partial denture classified based on whether it can be removed or not?
Removable partial denture (RPD) or fixed partial denture (FPD)
What is a removable partial denture (RPD)?
A prosthesis that replaces some teeth in a partially dentate arch and can be removed from the mouth
What is the definition of partial denture construction?
The science and techniques of designing and constructing removable partial dentures
What is removable prosthodontics?
The branch of prosthodontics concerned with the replacement of teeth and contiguous structures for edentulous and partially edentulous patients by artificial substitutes that are readily removable from the mouth by the patient
What is the defining feature of a Kennedy Class IV partially edentulous arch?
A single, bilateral, edentulous area located anterior to the remaining natural teeth
Which of the following is cited as a principal advantage of the Kennedy classification method?
All of the above
How should the Kennedy classification be used in relation to tooth extractions?
The classification should be determined after any necessary extractions have been completed
What is the purpose of the Kennedy classification system according to the text?
All of the above
What is the primary limitation of the Kennedy classification system?
It can be difficult to apply in every situation
What is the purpose of Applegate's rules for applying the Kennedy classification?
To govern the application of the Kennedy classification system
According to the Applegate Rule 6, how are edentulous areas other than those that determine the classification referred to?
Modifications
What is the purpose of the Kennedy classification system according to the text?
To guide the design of partial dentures
According to Applegate Rule 7, what is the only factor considered in determining the modification number?
The number of additional edentulous areas
What is the defining feature of a Kennedy Class III partially edentulous arch?
Unilateral bounded saddle
According to Applegate Rule 8, what is the restriction regarding modification areas in Class IV arches?
No modification areas can be included
What is the reasoning behind Class I referring to two edentulous areas and Class II referring to one, according to the text?
The principles of design make this distinction logical
According to Applegate Rule 7, how is the number of modification areas determined?
By the number of additional edentulous areas
What is the primary purpose of Applegate's rules for applying the Kennedy classification?
To standardize the classification process
Study Notes
Dental Implants and Partial Dentures
- A dental implant is a prosthetic device made of alloplastic material implanted into oral tissues to provide retention and support for a fixed or removable dental prosthesis.
- Not all patients are candidates for dental implant therapy; contraindications include unfavorable regional anatomy, uncontrolled systemic disease, extreme surgical risk, and high-dose head and neck radiation.
Classification of Partially Edentulous Arches
- A partially edentulous arch is an arch with one or more missing teeth, requiring a classification system to determine the type of prosthesis needed.
- Requirements for an acceptable method of classification include immediate visualization of the partially edentulous arch, differentiation between tooth-supported and tooth- and tissue-supported prostheses, and universality.
Kennedy Classification
- The Kennedy classification system is a widely accepted method of classifying partially edentulous arches.
- The system consists of four classes:
- Class I: Bilateral edentulous areas located posterior to the remaining natural teeth
- Class II: Unilateral edentulous area located posterior to the remaining natural teeth
- Class III: Single bounded edentulous area located anterior to the remaining natural teeth
- Class IV: Single, bilateral edentulous area located anterior to the remaining natural teeth
- Applegate's rules govern the application of the Kennedy method, including:
- Classification follows rather than precedes extractions
- Third molars are not considered in the classification unless they are to be used as abutments
- Edentulous areas other than those determining the classification are referred to as modifications and are designated by their number
- The extent of the modification is not considered, only the number of additional edentulous areas
- No modification areas are included in Class IV arches
Removable Partial Dentures (RPDs)
- A removable partial denture (RPD) is a prosthesis that replaces one or more, but not all, of the natural teeth and supporting structures.
- Objectives of RPD construction include:
- Restoring esthetics, function, and speech
- Preventing apposing teeth extrusion or migration and tilting of adjacent teeth
- Filling empty space or spaces
- Preventing disease atrophy
- Restoring muscular balance and psychological status
- Main causes of teeth loss include caries, periodontal diseases, trauma or accident, and congenital missing teeth.
- Indications for RPDs include:
- Distal extension situations (free end situation)
- Long span tooth-bounded edentulous area
- Need for cross-arch (bilateral) stabilization
- Excessive loss of the residual ridge
- Class IV edentulous area
Learn about the classification of partially edentulous arches in dentistry, in the context of partially edentulous patients and partial dentures. Explore the types of partial dentures and their support mechanisms.
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