What feature defines a Kennedy Class II RPD?

A Kennedy Class II removable partial denture (RPD) is characterized by a unilateral distal extension. This means there is an area where one side of the dental arch has missing teeth, with the remaining teeth located in front of and adjacent to this edentulous space. The presence of a unilateral distal extension necessitates special design considerations for stability and support, which distinguishes it from other Kennedy classifications, such as Class I, which involves bilateral distal extensions.

In a Kennedy Class II case, the support is derived from the remaining natural teeth on the side opposite to the edentulous area. This configuration typically requires precise planning to ensure the RPD can distribute forces effectively and maintain its position during function. Having this understanding is crucial for optimal RPD design and patient comfort.