Kennedy’s Classifications
Kennedy’s Classification (1923) groups the patterns of partial edentulism.
Partial edentulism is when some of the teeth are missing.
Class I “Bilateral free end saddles”
Teeth are lost bilaterally, leaving natural teeth anterior to the area of loss.
Class II “Unilateral free end saddle”
Teeth are lost unilaterally, leaving natural teeth anterior to the area of loss.
Class III “Unilateral bounded saddle”
Teeth are lost unilaterally, leaving natural teeth anterior and posterior to the area of loss.
Class IV “single anterior bounded saddle”
Teeth are lost bilaterally, leaving natural teeth posterior to the area of loss.
Applegate’s Addition
Applegate’s Addition included further classes of edentulism.
Class V
Teeth are lost, leaving anterior and posterior teeth. However, the anterior teeth cannot be used as abutment.
Class VI
Teeth are lost, with the remaining teeth fully supporting the prosthesis.
Modifications
There may be modifications, or further spaces within natural teeth.
Modification I
There is one space within the natural teeth.
Modification II
There are two spaces within the natural teeth.
Questions
Class I Modification I
Teeth are lost bilaterally, leaving only natural teeth anterior to the area of loss. There is one space within the natural teeth.
Class II Modification II
Teeth are lost unilaterally, leaving only natural teeth anterior to the area of loss. There are two spaces within the natural teeth.
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