1

Question 1

principles of surveying

Answer 1

• determine path of insertion

- identify wanted and unwanted undercuts

Question 2

how to fit dentures in pt with undercuts

Answer 2

remove undercuts

Question 3

What does mod mean

Answer 3

number of additional saddle areas

Question 4

what teeth are not included in kennedy classification

Answer 4

third molars

Question 5

what is craddocks classification about

Answer 5

load distribution: tooth/mucosa borne

Question 6

3 points to look at for face form

Answer 6

temples
angles
zygomas

Question 7

describe tapering form

Answer 7

• face form: temples widest, tapers in
• tooth: lean in towards root apex
• arch: tapers to a point at the front

Question 8

describe square features

Answer 8

face: straight lines between temples,zygomas and angles
- tooth: sharp corners
- arch: non-rounded, sharp corners

Question 9

describe oval features

Answer 9

face: widest at zygomas (in middle of face)
tooth: rounded
arch: rounded

Question 10

what is angles classification related to

Answer 10

position of 1st molars in static occlusion

Question 11

angles classification

Answer 11

1: max mesio-buccal cusp –> buccal fossa of mandibular 1st molar
2 div 1: max mesio-buccal cusp –> in between mandibular 5 and 6,/proclination of upper incisors
2 div 2: retroinclination of upper anteriors, bad lip support
3: mesio-buccal cusp between 1st and 2nd molars –> prominent chin, poss negative overjet, poor lip seal

Question 12

function of bracing clasp arm

Answer 12

reciprocate retentive (active) clasp arm

Question 13

when can a lingual bar not be used

Answer 13

too much recession

Question 14

how is a spoon denture retained

Answer 14

adhesion and cohesion

Question 15

how is a T denture retained

Answer 15

extended back to meet molars at gingival level

Question 16

why do T dentures need metal bit at back of upper incisors

Answer 16

otherwise would interfere with lower incisors

Question 17

what clasp must premolars and canines have and why

Answer 17

gingivally approaching. crown surface too big (molars better to clasp)

Question 18

which teeth in denture base extended to and why

Answer 18

canines. big root surface –> indirect retention

Question 19

what is a sanitary bridge

Answer 19

gap and bridge over it in dentures

Question 20

order of things in surverying

Answer 20

measure undercuts –> tilt plate and lock
draw lines on cast
carbon mark undercuts (depth gauge)
mark undercuts

Question 21

thickness of denture plate

Answer 21

0.4mm

Question 22

when to use labial/buccal bar

Answer 22

too much lingual undercut

Question 23

compare bar to plate

Answer 23

thicker but more soft tissue exposre –> less annoying to pt

Question 24

function of parts of retentive clasp

Answer 24

• bracing arm and 2/3 of retentive clasp above survey line: BRACING (prevents lateral shifting)
• flexible clasp tips –> retention

Question 25

how much of retentive clasp arm must enter undercut and why

DRAW DIAGRAM OF C CLASP AND PARTS’ FUNCTIONS (see sheet)

Answer 25

terminal 1/3 –> avoid traumatising tooth