Lec 1.3: Classifications Flashcards
The classification of a partially edentulous arch should satisfy the ff. requirements:
(1) It should _________ of the type of partially edentulous arch that is being considered.
(2) It should ________ between the tooth supported and tissue supported removable partial denture.
(3) Serve as a _______ to the type of design to be used.
(4). It should be universally ________.
- permit immediate visualization
- permit immediate differentiation
- guide
- accepted.
A classification of edentulous jaw conditions and partial dentures, based on the distribution of edentulous spaces, is made by?
Edward Kennedy
It is the most widely accepted classification of partially edentulous arches.
Kennedy classification
Those patients already wearing a partial denture.
Restored cases
Those patients that are without dental prosthesis.
Unrestored cases
Bilateral free-end saddle / distal extension
Class I
Bilateral edentulous areas located posterior to the remaining natural teeth.
Class I
Unilateral free-end saddle / distal extension
Class II
Unilateral edentulous area located posterior to the remaining natural teeth.
Class II
Unilateral edentulous area with natural teeth remaining both anterior and posterior to it (bounded).
Not crossing the midline.
Class III
Single, but bilateral (crossing the midline) edentulous area located anterior to the remaining natural teeth.
Class IV
It is a modification of Kennedy’s System.
Applegate-Kennedy’s System
- It is based less on the number and location of the remaining teeth and edentulous spaces.
- It takes into consideration the capabilities of the teeth, which bound the spaces to serve as abutments for prosthesis.
Applegate-Kennedy’s System
Classification should follow rather than precede any extractions of teeth that might alter the original classification.
Rule 1
If a third molar is missing and is not to be replaced, it is not considered in the classification.
Rule 2
If a third molar is present and is to be used as an abutment, it is considered in the classification.
Rule 3
If a second molar is missing and is not to be replaced, it is not considered in the classification (e.g., if the opposing second molar is likewise missing and is not to be replaced).
Rule 4
The most posterior edentulous area (or areas) always determines the classification.
Rule 5
Edentulous areas other than those that determine the classification are referred to as modifications and are designated by their number.
Rule 6
The extent of the modification is not considered, only the number of additional edentulous areas.
Rule 7
No modification areas can be included in Class IV arches.
Rule 8
This is the most common classification.
Class I
There are no further posterior teeth to the edentulous area. A free-end saddle is where in the saddle is not resting on teeth on both sides.
Class I
As they do not possess free-end saddles, they tend to be far more secure cases when designing.
Class III
Considered to be the rarest of the classifications.
Class IV
He modified and expanded the Kennedy Classification based on the condition of the abutment to include 2 additional group.
It takes into consideration the capabilities of the teeth, which bound the spaces to serve as abutments for the prosthesis.
Dr. O.C. Applegate
Classification Based On Restored Condition
Cummer’s
Behcet’s
Classification Based On Unrestored Condition
Austin-Ledge
Kennedy
Applegate
This refers to multiple edentulous areas present in a case.
Modifications
This is the most common classification
Class I
It is like Class I but just covering one side of the arch.
Class II
As they do not possess free-end saddles, they tend to be far more secure cases when designing.
Class III
Considered to be the rarest of the classifications.
Class IV
