Prosthodontics L3 - what is dental surveying

Question 1

what is the name of this instrument

Answer 1

parallelometer - it is sometimes referred to as a surveyor

Question 2

why would you use this instrument

Answer 2

to do survey lines

Question 3

why is it important to carry out surveys on the dental cast

Answer 3

if a survey analysis is done accuratley, we can locate and identify areas on teeth where suitable contours exist to hold a denture in place (desirable undercuts)

Question 4

what are undesirable undercuts

Answer 4

undesirable undercuts are areas of contour which would prevent the denture fully seating, which needs to be eliminated or reduced

Question 5

which image is showing a soft tissue or bony undercut on the lingual aspect

Answer 5

the bottom image

Question 6

The portion of a tooth that lies between its height of contour (survey line) and the gingivae.

This area of the abutment tooth must be suitable for the placement of a retentive clasp terminal. In order to escape the undercut the clasp would be forced to flex and thus generate retention.

the above is a definition of what

Answer 6

undercut

Question 7

The area of an abutment tooth or soft tissue across which a unit of the removal partial denture must pass without interference and therefore must be blocked out before the master cast is duplicated. The use of a surveyor produces a surface which is parallel to the proposed point of insertion

the above is a definition of what

Answer 7

undesirable undercut

Question 8

path of insertion and withdrawal coincides with which path

Answer 8

path of displacement