types of dental surveyors

2. TYPES OF SURVEYORS:
By:
Nimrah Razzaque Memon
DCP Batch V sem. VIII

3. OBJECTIVES:
•SURVEYING
•SURVEYOR
•TYPES OF SURVEYORS

4. SURVEYING:
The procedure of locating or delineating the contour and
position of the abutment teeth and associated structures
before designing a removable partial denture. GPT-1
SURVEYOR:
An instrument used in the construction of a removable
partial denture to locate and delineate the contours and
relative positions of abutment teeth and associated
structures- GPT

5. TYPES OF SURVEYOR:
•NEY SURVEYOR
•JELENKO SURVEYOR
•WILLIAMS SURVEYOR
•RETENTOSCOPE
•STRESS-O-GRAPH
•TICONIUM
•BROKEN ARM CAST SURVEYOR
•ELECTRICAL/ COMPUTERIZED
•OPTICAL SURVEYOR
•INTRA ORAL SURVEYOR
•PARALLELOMETER

6. NEY SURVEYOR:
•First model developed by Ney in 1923
•Original Ney surveyor featured a convenient palm rest
on the top of the vertical arm.
•First surveyor to be commercially available.
•Ney designed in 1938 is the currently used surveyor.

7. JELENKO SURVEYOR:
•It is also known as Will’s surveyor.
•It was introduced in 1929
•It is used with different designs of cast holders.

8.  Ney
 Horizontal arm: fixed
 Vertical arm: retained
by friction
 The shaft remains in
any vertical position
until again it is moved.
 Cast table is moved
around surveyor
platform.
 Jelenko
 Horizontal arm:Movable
 Vertical arm: spring
mounted
 Vertical arm when
released return to its
original position.
 Cast table is fixed with
the magnet in the
surveyor platform

9. WILLIAM SURVEYOR:
•Table is adjusted to desired tilt.
•Degree of inclination can be recorded for
positioning the cast at any time.
•Centre of rotation always remains constant.

10. RETENTOSCOPE:
•It is produced by the saddle lock company.
•It is a surveyor with undercut gauge.
•The cast attached on the table can be raised and
lowered vertically and eliminates the need for
movement in vertical rod.

11. TICONIUM:
STRESS O GRAPH:
•One of the modern instrument
•The marking point will make vertical line on
the abutment tooth until depth has been
reached.
•Also produced by Ticonium company.
•Consists of two vertical holders/ horizontal arms.
•One for measuring undercut.
•Second for measuring survey line.

12. BROKEN-ARM CAST
SURVEYOR:
•Featuring the Gimbel stage table.
•Can be adjusted in any tilt/ direction.
•Spring loaded surveying arm.
•Straight hand piece could easily be clamped with
surveying arm.

13. ELECTRONIC/COMPUTERIZED
SURVEYORS:
•Surveyor with milling machine: built in motor and cross table
•Micro analyzer: capable of measuring undercut electronically in
mm.
•Paratherm surveyor: blockout waxing instrument heats waxing
tools electrically, surveying arm moves in 3 axis.
•Austenal surveyor: modern electical surveyor.

14. OPTICAL SURVEYOR:
•parallel light beams.
•Light bulbs with dense filaments & condenser
lenses.
•Contained in a box.
Advantages:
•Changes in survey lines & undercut can be
inspected easily.
•Better visualization.
Disadvantages:
•Requires dark room
•Light beams reflecting from cast can pose
problems in illumination.

15. INTRA-ORAL SURVEYORS:
•For checking tooth preparation of abutment teeth
for fixed/removable partial dentures.
•Accurately indicates planned path of insertion
•Visual guide during tooth preparation
•Inexpensive, practical & readily available method.

16. PARALLELOMETERS:
•Used before surveyors.
•Can be used intra orally as well as in labs.
•Partially block undercuts.
•Advanced parallelometer: Galloni isoparallelometer
model 1020
•2000 Bechmann parallelometer: for the placement
of precision attachment parallel to path of insertion.