Introduction to Removable Partial Denture

The basis behind the Kennedy classification given by Edward Kennedy in 1923:

• based on the relationship of the edentulous spaces to the abutment tooth

• based on the number of missing teeth in the arch

• based on the most posterior edentulous space seen for classification and additional spaces for modification

• based on the number of the edentulous space to be restored in the arch

• based on the type of support available for the partial denture

Class IV Kennedy classification is

• Bilateral edentulous area located posterior to the remaining natural teeth

• Unilateral edentulous area located anterior to the remaining natural teeth

• Unilateral edentulous area located posterior to the remaining natural teeth

• Bilateral,single edentulous area located anterior to remaining teeth and crosses the midline

• Bilateral edentulous area located anterior to the remaining natural teeth

A distal extension partial denture case received its support

• From terminal abutments

• Equally from abutments and the residual ridges

• Mostly from residual ridges

• Exclusively from residual ridge

• Partially from abutment and mostly from the residual ridges, in long span cases

The mandibular distal extension RPD extends up to

• Full length of retromolar pad

• Anterior 1/3 length of reromolar pad

• Anterior 2/3 of retromolar pad

• Anterior 2/3 of ridge length but not on the ascending portion mesial to retromolar pad

• Anterior 1/3 of ridge length but not on the ascending portion mesial to retromolar pad

Distal extension RPD is

• Both tissue and tooth borne

• Tooth borne

• Class III condition

• Class IV condition

• Mucosal borne

Bilateral edentulous area present posterior to the remaining teeth with future planning of tooth 31 and 32 extractions can be classified as Kennedy’s

• Class I

• Class I Modification 2

• Class II Modification I

• Class II Modification 2

• Class I Modification 1

If a third molar is absent and not to be replaced

• It is not considered in the classification of partial dentures

• It may or may not be considered

• It is considered important for classification

• Act as the edentulous space is exist and important for classification

• It is considered as additional tooth spaces for modification

The most widely used partial denture classification for distal extension case is;

• Kennedy

• Kennedy-Applegate

• Cummer

• Lamine and Osborne

• Becket

The main advantage of RPD over FPD in replacing bilateral lower missing teeth is:

• Cross arch stabilization

• Aesthetic

• Cheap

• Comfort to the patient

• Equal distribution of force to long axis of tooth

Main cause of failure of RPD is as a result from:

• Caries of the abutment

• Resorption of the ridge

• Interference with the function of the tongue

• Fracture of metal framework

• Bending of metal framework