Prosthodontic transfer lines

Question 1

What are the main transfer lines

Answer 1

• centreline
• mid canine line
• residual alveolar ridge contour
• centre of the lower alveolar ridge line
• high smile line
• rim profile

Question 2

What does the centre line indicate

Answer 2

where the central incisors will sit

Question 3

What does the mid canine line indicate

Answer 3

indicates where centre of canine should set

can help in picking mould

Question 4

What does the residual alveolar ridge contour line indicate?

Answer 4

the upwards slope of the alveolar ridge. Teeth should not be set on an incline/slope

Question 5

What other information is required if casts don’t hand articulate

Answer 5

OVD

Question 6

How do we provide the lab with the OVD

Answer 6

• measure px resting face height and trim wax blocks until you get FWS of 2-4mm
• use bite reg paste and get px to bite together to their prescribed OVD

Question 7

What other lines are useful on a jaw registration for the lab

Answer 7

high smile line

Question 8

What can the high smile line aid with

Answer 8

gingival contouring and for crown heights when selecting teeth for the denture can get an idea of how much tooth will show when smiling

Question 9

What is the rim profile for

Answer 9

To ensure adequate lip support

helps in knowing where to set the teeth

Question 10

What does the central occlusal plane indicate?

Answer 10

the central occlusal plane indicates where the incisal level of the tooth should be