RPD LECTURE 2

Question 1

these connect parts of the prosthetics on one side of the arch to those on the opposite side

Answer 1

MAJOR connectors

Question 2

should major connectors be flexible or rigid?

Answer 2

you want to them to be rigid to avoid stress on the abutment teeth and damage to the supportive structures

Question 3

how far away should the borders of MCs beaway form and parallel to the gingival margins?

Answer 3

should be a minimum of 6 mm away from.

Question 4

where does the posterior limit of the maxillary MCs terminate?

Answer 4

AT or anterior to the vibrating line.

per usual

Question 5

what angle should the MCs cross the midline?

Answer 5

90 degrees- not diagonally for better patient adaptation and tongue acceptance.

Question 6

what should the AP width of the anterior posterior strap be?

Answer 6

8 mm

Question 7

can you use any kennedy classification with A strap max?

Answer 7

yep!

Question 8

what do you frequently use for a Kennedy class III?

Answer 8

single palatal strap.
8 mm width for ridigidy
-PREFERRED by patients

Question 9

when should you use a full palate major connector?

Answer 9

if there is remaining abutment tooth on either side is a canine or 1st pre molar. especially in cases with severe vertical ridge resorption

Question 10

what do you use for a class IV?

Answer 10

U shaped.
not favored.
lacks rigidity= torquing of the abutment teeth

Question 11

indication for a U shape connector?

Answer 11

large inoperable torus extending posteriorly= can’t place posterior strap

Question 12

two type of mandibular MCS?

Answer 12

lingual bar and linguoplate

Question 13

how far below free gingival margin should a lingual bar be?

Answer 13

3 mm below

Question 14

do patients prefer the lingual bar or the linguolplate?

Answer 14

llingual bar

Question 15

inferior aspect of the lingual bar has a half pear contour for greatest bulk and rigidity. the bar = ___ mm in vertical height

Answer 15

4 mm

Question 16

what would be the distance from the FGM to the base of the lingual bar?

Answer 16

7 mm.

4+3

Question 17

what does the linguoplate need for Class I and II designs?

Answer 17

also add in the terminal occlusal rests or cingulum rests

Question 18

when do we use lingual plate vs. lingo bar?

Answer 18

when there is NOT 7 mm of vertical height from the FGM to the floor of the mouth or other considerations

Question 19

indications for linguoplate?

Answer 19

stabilization of periodontally mobile teeth by splinting.
provision for anticipated loss of teeth which may be added to the plate
=space requirement is

Question 20

connecting link from MC to all other PRDP components such as clasp assemblies, indirect retainers or auxillary rests, denture base

Answer 20

Minor Connectors

Question 21

where do the minor connectors transfer stresses?

Answer 21

to the abutment teeth and/or underlying supporting tissues

Question 22

a flat area on a tooth surface (mesial/distal) created to follow the contour of the tooth and define the path of insertion?

Answer 22

Guide Plane

Question 23

what is the size of the guiding plane?

Answer 23

2-3 mm * 2-3 mm depending on the size of the tooth

Question 24

guide plate?

Answer 24

the part that engage the guide plane of the TOOTH during insertion and removal

Question 25

what does the guide plate resist?

Answer 25

horizontal forces

Question 26

what kind of support to rests provide?

Answer 26

vertical
present the impingement of soft tissues by resistant tissue ward movement.
distributes occlusal lods to the supporting abutment teeth
-preserve established occlusal relationships

Question 27

what should the base of the triangle for a rest be?

Answer 27

2.3 mm wide.

length should = width for molars and pre molars

Question 28

height of the marginal ridge for a rest should be reduced to what?

Answer 28

1.0-1.2 mm to allow for the bulk of the metal for strength and rigidity

Question 29

what should the floor of the rest seat be apical to?

Answer 29

1.5 mm deep? spoon shaped and concave

Question 30

how do you refine the rest preps?

Answer 30

diamond burs, finishing green stones, and carborundum- impregnated rubber points

Question 31

3 ways you can change the survey line?

Answer 31

enameloplasty, composite resin bonding, survey crown.

Question 32

the angle formed by occlusal rest and MC from which it originates should be less than ___ so that forces can be directed down long axis of abutment tooth?

Answer 32

less than 90

if greater than 90 might have slippage

Question 33

can you place rests on any restorative material?

Answer 33

YES

Question 34

why is canine preferred as a rest?

Answer 34

cingulum