Kennedy Classification of Partially Edentulous Arches

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Questions and Answers

What are the 3 classification requirements?

Immediate visualization of the type of partially edentulous arch being considered, 2. Permit immediate differentiation between tooth-supported and tooth-tissue supported removable partial dentures, 3. Universally acceptable.

The Kennedy classification system is based on the ___

frequency of occurrence.

What is defined as bilateral edentulous areas located posterior to remaining natural teeth?

Kennedy Class 1

What is characterized by one distal extension area located posterior to remaining natural teeth?

Kennedy Class 2 Signup and view all the answers

What type of edentulous area has natural teeth remaining both anterior and posterior to it?

Kennedy Class 3 Signup and view all the answers

What type of area is a single, bilateral edentulous area located anterior to remaining natural teeth?

Kennedy Class 4 Signup and view all the answers

What are the rules that govern the application of the Kennedy classification system?

Applegate's rules Signup and view all the answers

Edentulous areas other than those determining classification are termed __

modification spaces Signup and view all the answers

The extent of modification space is NOT considered, only the __ of additional edentulous areas are considered.

number Signup and view all the answers

Classification always __ rather than precedes any extraction of teeth.

follows Signup and view all the answers

The most __ edentulous area(s) always determines the classification.

posterior Signup and view all the answers

Missing molars are not considered in the classification unless they are to be __.

replaced Signup and view all the answers

If a __ molar is missing and is not to be replaced it is not considered in the classification.

second/third Signup and view all the answers

What type of molars are usually not replaced with RPD?

3rd molars Signup and view all the answers

If a 3rd molar is present and is to be used as an ___ it is considered in the classification.

abutment Signup and view all the answers

If a 1st molar is present, 2nd and 3rd molars are not necessarily __.

replaced Signup and view all the answers

Class IV arches do not have __.

modification spaces Signup and view all the answers

If there are edentulous areas posterior to the single bilateral area crossing midline, those areas determine the __.

classification Signup and view all the answers

What is characterized by one distal extension area?

Kennedy Class II Signup and view all the answers

Class III's are characterized by no distal extension areas.

True Signup and view all the answers

A __ has one and only one modification space that crosses the midline.

Class IV Signup and view all the answers

Maxillary Class 4 = __.

trauma Signup and view all the answers

Mandibular class 4 = __.

periodontal disease Signup and view all the answers

Study Notes

Kennedy Classification Requirements

Immediate visualization of partially edentulous arch types.
Differentiation between tooth-supported and tooth-tissue supported removable partial dentures.
Universally accepted system.

Kennedy Classification Overview

Based on frequency of occurrence in partially edentulous arches.

Kennedy Classes

Class 1: Bilateral edentulous areas posterior to remaining natural teeth.
Class 2: One distal extension area located posterior to the remaining natural teeth.
Class 3: Edentulous area with natural teeth remaining both anterior and posterior.
Class 4: Single, bilateral edentulous area located anterior to remaining natural teeth.

Applegate's Rules

Set of rules governing the application of Kennedy classification system.

Rule Highlights

Rule 1: Edentulous areas not determining classification termed 'modification spaces'.
Rule 2: Modification space extent not considered; only the number of additional edentulous areas matters.
Rule 3: Classification follows any extraction of teeth, not precedes.
Rule 4: The most posterior edentulous area determines the classification.
Rule 5: Missing molars considered only if to be replaced; second/third molars not included if not being replaced.
Rule 5: Third molars typically not replaced with removable partial dentures (RPD). If present as abutments, they are considered in classification.
Rule 6: Class IV arches do not have modification spaces; any areas posterior to the bilateral area help determine classification.

Edentulous Areas

A Class IV always crosses the midline and lacks modification spaces.
Edentulous areas may not need to be the same length.
Edentulous areas extending to the distal aspect of the arch are called distal extension areas.
Additional missing teeth anterior to extension areas are termed modification spaces.

Specific Class Characteristics

Class II characterized by one distal extension area.
Class III characterized by no distal extension areas.
Class IV defined by one modification space that crosses the midline.
Maxillary Class IV associated with trauma; Mandibular Class IV related to periodontal disease.

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Description

This quiz covers the Kennedy classification system for partially edentulous arches. You will learn about the classification requirements and the basis of the Kennedy system. It's an essential tool for understanding removable partial dentures.