rest and rest seat

Question 1

components of partial denture design

Answer 1

1. support
2. major and minor connectors
3. direct retainers
4. stabilizing component

Question 2

provides vertical support for the dental prosthesis.

absorbs and receives the occlusal load

Answer 2

support

Question 3

it is the principle that describes how well the underlying structures ( teeth and tissue ) keeps the denture from moving vertically towards the arch in question.

Answer 3

support

Question 4

two main types of RPD according to: manner of support

Answer 4

tooth supported
tooth and tissue supported

Question 5

Derives all of its support from the abutment teeth

Rest seats located in the abutment.

Answer 5

tooth supported RPD

Question 6

A tooth, a portion of a tooth, or a portion of an implant that serves to support and/or retain a prosthesis.

Answer 6

abutment

Question 7

primary and secondary support of tooth and tissue support

Answer 7

primary - tissue underlying from the base

secondary - support from the abutment teeth

Question 8

ideal location for tooth and tissue supported rest seat

Answer 8

the abutment adjacent to each edentulous space but on the surface away from the edentulous space.

Question 9

Any component of a partial denture that directs the occlusal load to the abutment teeth

Answer 9

rest

Question 10

The prepared surface of an abutment that receives the rest.

Answer 10

rest seat

Question 12

The primary purpose of the rest is to

Answer 12

1. Maintain the components in their planned position
2. Maintain the established occlusal relationships
3. Prevent impingement of tissues
4. Direct and distribute the occlusal loads to abutment teeth

Question 13

Outline form of occlusal rest seat

Answer 13

Rounded triangular shape - with apex towards the center of the occlusal surface

Question 14

Depth
Width/length of occlusal rest seat

Answer 14

Depth = 1.5mm
W/lL =2.5mm

Question 15

The relation of the occlusal rest to the abutment should be ___ joint

To prevent horizontal stress to the abutment teeth

Answer 15

Shallow ball and socket joint

Question 16

Th angle formed by the occlusal rest and the vertical minor connector should be less than __ degrees

Answer 16

90 deg

Question 17

An angle greater than 90 degrees by the occlusal rest and the vertical minor connector causes?

Answer 17

Failure in transmitting occlusal forces along the supporting vertical axis of the abutment tooth

Permits slippage of prosthesis

Question 18

Preferred location for lingual rests

Answer 18

MAXILLARY CANINE and max central incisor

Question 19

Conditions where anterior teeth is employed as ites for external rests

Answer 19

If anterior teeth may be the only abutment available

Must be used to support an indirect retainer or auxillary rest

Question 20

Location of lingual rest

Answer 20

Prepared on the lingual surface at the junctionn of gingival and middle 1/3 of the tooth

Question 21

Incisal rest are more applicable on the ___ tooth

Answer 21

Mandibular canine

Question 22

The least desirable placement of a rest seat

May lead to orthodontic movements due to unfavorable leverage factors

Answer 22

Incisal rest

Question 23

Why does lingual rest is preferred over the incisal rest

Answer 23

Becauselingual rest is placed closer to the horizontal axis of rotating, which has a lesser tendency to tip the tooth

More eshetically acceptable

Question 24

Axis of rotation of incisal rest

Answer 24

Horizontal