03: Direct Retainers, Indirect Retainers

Question 1

The components of an RPD that engage abutments, and resist dislodging forces

Answer 1

Direct retainers

Question 2

1. Intracoronal

2. Extracoronal

Answer 2

The two types of direct retainers

Question 3

1. Extracoronal attachments

2. Retentive clasp assemblies

Answer 3

Two distinct sub-categories of extracoronal direct retainers

Question 4

The most common method for extracoronal direct retention

Answer 4

Retentive clasp assemblies

Question 5

1. Path of insertion for the RPD

2. The HOC for each abutment

Answer 5

Things the dentist must know when using retentive clasp assemblies

Question 6

For an RPD, what is the HOC

Answer 6

The greatest axial diameter of the crown when viewed from the path of insertion

Question 7

This is designed to contact the abutment surface apical to the height of contour and will resist displacement in an occlusal direction

Answer 7

Clasp terminus