Removable partial denture-Definition,Kennedy classification,Applegate’s Rules
Definition: Denture replaces one or more teeth in the same arch or a prosthesis that replaces one or more, but not all of the natural teeth and supporting structures. It is supported by the teeth and/or the mucosa. It can be removed from the mouth and replaced by the patient.
Classification of partially edentulous arches:
Kennedy method of Classification:
Class I – bilateral edentulous areas located posterior to all remaining natural teeth.
Class II – unilateral edentulous area located posterior to all remaining natural teeth.
Class III – unilateral edentulous area bounded by anterior & posterior natural teeth.
Class IV – a single, but bilateral (crossing the midline) edentulous area located anterior to remaining natural teeth.
Applegate’s Rules for Applying the Kennedy Classification
Rule 1: Classification should follow rather than precede extraction.
Rule 2: If the 3rd molar is missing and not to be replaced, it is not considered in the classification.
Rule 3: If the 3rd molar is present and to be used as an abutment, it is considered in the classification.
Rule 4: If the second molar is missing and not be replaced, it is not considered in the classification.
Rule 5: The most posterior edentulous area determines the classification.
Rule 6: Edentulous areas other than those determining classification are called modification spaces.
Rule 7: The extent of the modification is not considered, only the number.
Rule 8: There is no modification space in Class IV.