Reasoning

Question 1

why is cobalt chrome rarely used for complete dentures
name 2 exceptions

Answer 1

it is heavier therefore less retention
exceptions = bruxism patients and patients with an acrylic allergy

Question 2

clinical effects of a patient becoming edentulous (3)

Answer 2

ridge resorption , soft tissue changes to chin and lip, reduction in face height

Question 3

in what ways is a patient impacted by becoming edentulous

Answer 3

reduced masticatory function
changes to appearance
decreased self esteem
decreased quality of life - speech, eating, appearance all altered

Question 4

when does resorption occur most rapidly

Answer 4

resorption occurs throughout life but most rapidly the 1st 6 months post extraction
extent is individually variable

Question 5

Cawood and Howell Classification

Answer 5

classification of the changes in shape of the alveolar processes in mandibles / maxillas
scored from 1 (pre extraction) to 6 (depressed bone level)

Question 6

mylohyoid ridge

Answer 6

also known as internal oblique ridge
runs along lingual surface of mandible, anterior portion lies close to inferior border but it rises higher as it moves posterior

Question 7

Name 4 questions that should be asked when taking a denture history

Answer 7

• any previous denture experience?
• were previous dentures a success or failure and why?
• how old are your current dentures ?
• are they wearing a matched set?
• have any modifications been made to your current denture

Question 8

where does the primary support of upper and lower full dentures come from

Answer 8

upper - palate and tuberosity
lower - buccal shelf

Question 9

what should the anterior and posterior occlusal planes be parallel to

Answer 9

anterior - inter pupillary line
posterior - ala-tragus line

Question 10

what is a foxes bite plane used for

Answer 10

confirming the occlusal planes

Question 11

what instrument can be used to assess vertical height when preparing dentures

Answer 11

willis bite gauge
or dividers and indelible pencil

Question 12

post dam

Answer 12

post dam area = junction between hard and soft palates (vibrating line)
post dam = slightly raised posterior border of upper dentures to gain optimum seal and retention

Question 13

what are the 6 clinical stages of construction for complete dentures

Answer 13

1 - primary impressions
2 - master impressions
3 - jaw registration
4 - try in
5 - delivery
6 - review

Question 14

name 5 checks that should be carried out at the try in stage for complete dentures

Answer 14

vertical dimension , lip support, speech, retention, base extensions, appearance , occlusal planes