Lec 5: Surverying, Rests / Rest Seats

Question 1

• Act of using a surveyor
• The process of determining the most suitable path of insertion for RPD without exerting undue stress to the abutment tooth and without causing trauma to soft tissues.

Answer 1

Surveying

Question 2

The process of analyzing the study cast for establishing structural design details of the RPD.

Answer 2

Surveying

Question 3

Considered as blueprint of RPD design.

Answer 3

Surveying

Question 4

A diagnostic instrument to select the most favorable path of insertion and aid in the preparation of guiding planes.

Answer 4

Dental surveryor

Question 5

Also known as parallelometer

Answer 5

Dental surveyor

Question 6

Complicated and expensive and their use is restricted to research and large commercial dental laboratories.

Answer 6

Electronic surveyor

Question 7

Relatively inexpensive and easy to use

Answer 7

Mechanical surveyor

Question 8

The part of the surveyor to which a cast can be attached.

Answer 8

Survey Table

Question 9

Allows anterior, posterior, and lateral tilts.

Answer 9

Tilt top

Question 10

Allow the cast to stay in place.

Answer 10

Cast clamp & screw

Question 11

Allows tilting of the tilt top.

Answer 11

Ball pivot & Ball retaining ring

Question 12

A vertical arm used to analyze the parallelism of various cast surfaces.

It contains a holder so that several surveying tools may be attached and used.

Answer 12

Surveying arm

Question 13

Used to mark the location of height of contour on a dental cast.

Answer 13

Carbon marker

Question 14

• A thin straight metal rod to analyze contours and undercuts.
• The principal tool for surveying.

Answer 14

Analyzing rod

Question 15

Used to prevent or reduce breakage of carbon markers.

Answer 15

Protective sheath

Question 16

Metal rods with terminal ledges or lips (most common widths are 0.01” & 0.02”).

Answer 16

Metal gauge

Question 17

• A tool with a straight sharp edge, which parallels the surveying arm.
• To contour waxes crowns, place blockout for partial denture framework.
• Used with a dragging or shaving motion to remove thin layers.

Answer 17

Wax trimmer

Question 18

The path along which a prosthesis is placed or removed intraorally.

Answer 18

Path of insertion

Question 19

The area on a tooth occlusal to height of contour.

Answer 19

Supra-bulge area

Question 20

The area gingival to the height of contour (an undercut) is called?

Answer 20

Infra-bulge area

Question 21

The retentive portions of direct retainers are located in this area, since they can flex to pass over this structure.

Answer 21

Infra-bulge / undercut area

Question 22

Used to control and limit the directions of movement of an RPD as it is being inserted, removed, or while it is in function.

Answer 22

Guiding planes

Question 23

Are prepared whenever rigid components of a partial denture contact the abutment teeth.

Answer 23

Guiding planes

Question 24

Should be the initial portions of the partial denture to contact the abutments.

Answer 24

Bracing elements/ proximal plates

Question 25

Guiding planes are specifically prepared for? (3)

Answer 25

• proximal plates
• bracing arms
• rigid portions of retentive clasps

Question 26

• A rigid component of a removable partial denture which rests in a recessed preparation on the occlusal, lingual, or incisal surface of a tooth to provide vertical support for the denture.
• Classified as a supporting element.

Answer 26

Rest

Question 27

A portion of a tooth selected and prepared to receive an occlusal, lingual, or incisal rest.

Answer 27

Rest seat

Question 28

Minimal clearance for occlusal rest seats

Answer 28

1-1.5mm

Question 29

When cingulum is poorly developed with insufficient bulk for a cingulum rest seat preparation, a rest seat can be made using _________?

Answer 29

Composite resin (bonded rest seats)