Salaam waaleh kum… : 1 Prof. Dr. S.Venugopal. Salaam waaleh kum…
DENTAL SURVEYOR The tool for perfect planning of Removable Partial Denture : 2 Prof. Dr. S.Venugopal. DENTAL SURVEYOR The tool for perfect planning of Removable Partial Denture Prof. Dr. S.Venugopal.
Slide 3 : 3 Prof. Dr. S.Venugopal. Definition
An instrument used to determine the relative parallelism of two or more surfaces of the teeth or other parts of the cast of a dental arch.
When first used ? : 4 Prof. Dr. S.Venugopal. When first used ? 1918
Who introduced first… : 5 Prof. Dr. S.Venugopal. Who introduced first… Dr. A.J. Fortunati is thought to be the first person to employ a mechanical device to determine the relative parallelism of tooth surfaces. The first such device to be produced commercially, the Ney instrument, was made available in 1923; it remains the most widely used surveyor in the dental field. The Wills surveyor by Jelenko is second most widely used.
OBJECTIVES OF SURVEYING: : 6 Prof. Dr. S.Venugopal. OBJECTIVES OF SURVEYING: Permit an Accurate Charting of the Required Mouth Preparations
Determine the Most Acceptable Path of Placement and Removal
Determine the Relative Parallelism of Teeth Surfaces That Act As Guiding Planes
OBJECTIVES OF SURVEYING: : 7 Prof. Dr. S.Venugopal. OBJECTIVES OF SURVEYING: Identify and Measure Tooth Undercuts
Delineate Height of Contour
Trimming Blockout Material Parallel to the Path of Placement
Recording the Cast Position
Where undercut!?!? : 8 Prof. Dr. S.Venugopal. Where undercut!?!? Survey line Is A Dig Or A Burrow Lie Below The
Height Of Contour, Which Is The Most
Bulbous And Convex Part Of The Tooth Line Outlined On the Model By A
Surveyor Marking the Greatest
Prominence Of Tooth Contour
Slide 9 : Height of contour
Undercut: : 10 Prof. Dr. S.Venugopal. Undercut: An undercut is formed when the base of an object is smaller than its top Undercut Area
Slide 11 : 11 Prof. Dr. S.Venugopal. Non-undercut Area Undercut here
Rule: Retentive tip should usually be designed to be placed in the gingival 1/3 : Rule: Retentive tip should usually be designed to be placed in the gingival 1/3
Slide 13 : 13 Prof. Dr. S.Venugopal.
Slide 14 : 14 Prof. Dr. S.Venugopal. Types of undercuts Tooth Undercuts (Proximal undercuts) Soft Tissues or bony Undercuts(on lingual side of ridge)
Slide 15 : 15 Prof. Dr. S.Venugopal. 1-Desirable Undercuts : where used for retention
2-Undesirable Undercuts: Almost all undercuts in or other way… Types of undercuts
Path of Insertion : Path of Insertion Path that the prosthesis is
Placed/removed
Usually a single path
Slide 17 : 17 Prof. Dr. S.Venugopal. P.I Is The Direction in Which a Restoration/Prosthesis Moves From the Point of Initial Contact With the Supporting Teeth to the Terminal Resting Position Where the Occlusal Rests Are Seated and the Denture Base Is in Contact With the Tissue The Direction of Movement of the Restoration/Prosthesis From Its Resting Position to the Last Contact With the Supporting Teeth". Path of Insertion(P.I) Path of Removal(P.R): Reverse of the Path of Insertion
Slide 18 : 18 Prof. Dr. S.Venugopal. Post Is More Readily Removed by Application of Force Near Its Top Than by Applying Same Force Nearer Ground Level
Slide 19 : 19 Prof. Dr. S.Venugopal. Blatterfein Classified survey lines as Under:
High survey Line
Medium Survey Line
Low Survey line
Diagonal Survey Line CLASSIFICATION OF SURVEY LINES:
Slide 20 : 20 Prof. Dr. S.Venugopal. High Survey Line: High Survey line is found near the occlusal surface of a tooth often being parallel to the gingival margin. Blatterfein Classified survey lines
Slide 21 : 21 Prof. Dr. S.Venugopal. Medium Survey Line: Medium Survey line is situated across the center of the tooth and exhibits a slight occlusogingival incline from the near zone to the far zone. Blatterfein Classified survey lines
Slide 22 : 22 Prof. Dr. S.Venugopal. Low Survey Line: Low Survey Line is situated close to and parallel to the gingival margin. It frequently occurs as a result of marked inclination of the tooth and may also occur on conically shaped tooth. Blatterfein Classified survey lines
Slide 23 : 23 Prof. Dr. S.Venugopal. Ney’S classification of survey lines: Class I: Survey line runs diagonally across the tooth surface. The type of clasp indicated is occlusally approaching cast clasp with terminal third engaging the undercut.
Slide 24 : 24 Prof. Dr. S.Venugopal. Class II: Survey line also runs diagonally across the tooth surface but as a mirror image of Class I line. Here a gingivally approaching clasp arm is suggested. Ney’S classification of survey lines:
Slide 25 : 25 Prof. Dr. S.Venugopal. Class III: Survey line is parallel to the occlusal surface and lies just below it. Ney’S classification of survey lines:
Slide 26 : 26 Prof. Dr. S.Venugopal. Ney Surveyor Jelenko Surveyor Dental Surveyor
Slide 27 : 27 Prof. Dr. S.Venugopal. Parts
of a Dental Surveyor A-The Base
B-Vertical Upright Column
C-Cross Arm with Spindle Housing
D-The Vertical Spindle With Tool Holder
E- Screw To Lock The Spindle
F- Tool adaptor Holder
G- Surveying tool holder
H- The Surveyor Table
I- Surveying tool
J- Model Clamp
K- Model table lock nut
L- Model rotating ball & socket
M- Ball rotating ring
N- Tool Rack
O- Storage Compartment
P- Model lock nut
Parts of a Surveyor : Parts of a Surveyor Surveying Table
Parts of a Surveyor : Parts of a Surveyor Surveying Arm
Slide 30 : 30 Prof. Dr. S.Venugopal. Surveying Tools 3- Undercut Gauge 1- Analyzing Rods 4- Wax Trimmer 2- Carbon Marker
Parts of a Surveyor : Parts of a Surveyor Surveying Tools
Analyzing Rod
Slide 32 : 32 Prof. Dr. S.Venugopal. Analyzing Rod
Slide 33 : 33 Prof. Dr. S.Venugopal. Surveying Tools 3- Undercut Gauge 1- Analyzing Rods 4- Wax Trimmer 2- Carbon Marker
Parts of a Surveyor : Parts of a Surveyor Surveying Tools
Carbon Markers
Slide 35 : 35 Prof. Dr. S.Venugopal. Carbon Marker
Parts of a Surveyor : Parts of a Surveyor Surveying Tools
Undercut Gauges
Slide 37 : 37 Prof. Dr. S.Venugopal. Undercut Gauge
Slide 38 : 38 Prof. Dr. S.Venugopal. Undercut Gauges
Undercut Gauges : Undercut Gauges
Slide 40 : 40 Prof. Dr. S.Venugopal. Undercut Gauge
Parts of a Surveyor : Parts of a Surveyor Surveying Tools
Wax Trimmer
Slide 42 : 42 Prof. Dr. S.Venugopal. Wax Trimmer
Slide 43 : 43 Prof. Dr. S.Venugopal. Ney Surveyor
Jelenko Surveyor
Williams Surveyor
The Retentoscope
The Ticonium surveyor
The Micro-Analyzer TYPES OF DENTAL SURVEYOR
Slide 44 : 44 Prof. Dr. S.Venugopal. Ney Surveyor
Jelenko Surveyor
Williams Surveyor
The Retentoscope
The Ticonium surveyor
The Micro-Analyzer TYPES OF DENTAL SURVEYOR
Slide 45 : 45 Prof. Dr. S.Venugopal. Ney Surveyor
Jelenko Surveyor
Williams Surveyor
The Retentoscope
The Ticonium surveyor
The Micro-Analyzer TYPES OF DENTAL SURVEYOR
Slide 46 : 46 Prof. Dr. S.Venugopal. Ney Surveyor
Jelenko Surveyor
Williams Surveyor
The Retentoscope
The Ticonium surveyor
The Micro-Analyzer TYPES OF DENTAL SURVEYOR
Slide 47 : 47 Prof. Dr. S.Venugopal. Ney Surveyor
Jelenko Surveyor
Williams Surveyor
The Retentoscope
The Ticonium surveyor
The Micro-Analyzer TYPES OF DENTAL SURVEYOR
Slide 48 : 48 Prof. Dr. S.Venugopal. Ney Surveyor
Jelenko Surveyor
Williams Surveyor
The Retentoscope
The Ticonium surveyor
The Micro-Analyzer TYPES OF DENTAL SURVEYOR
Slide 49 : 49 Prof. Dr. S.Venugopal. P-W rotary surveyor
used to determine a hinge axis TYPES OF DENTAL SURVEYOR
Slide 50 : 50 Prof. Dr. S.Venugopal. Intraoral surveyor TYPES OF DENTAL SURVEYOR
Slide 51 : 51 Prof. Dr. S.Venugopal. The Prosthesis Goes Smoothly Into Place Without Interference After Analyzing the Proximal Tooth Surfaces and Making the Necessary Alteration Principles of Surveying
Slide 52 : 52 Prof. Dr. S.Venugopal. Recontouring the tooth surface Principles of Surveying
Slide 53 : 53 Prof. Dr. S.Venugopal. The Location of the Undercut Area Can Be Changed by Changing the Tilting Principles of Surveying
Slide 54 : 54 Prof. Dr. S.Venugopal. The location of the undercut area can be changed by tilting the cast anteriorly or lateral Principles of Surveying
Slide 55 : 55 Prof. Dr. S.Venugopal. A Cast in a Tilted Relationship Represents a Path of Placement Toward the Side of the Cast That Is Tilted Upward Principles of Surveying
Slide 56 : 56 Prof. Dr. S.Venugopal. Cast at zero tilt. Creation of undercut by tilting cast Without guiding planes, Clasps designed are ineffective when restoration is subject to dislodging forces in occlusal direction. B D Principles of Surveying
Slide 57 : 57 Prof. Dr. S.Venugopal. Selection of The Path of Insertion The Most Favorable Path of Insertion (PI) Is That Perpendicular to the Occlusal Plane Most Patients Tend to Seat Their Dentures Under Biting Force If Undercuts are Present but Not Efficient at the Zero Tilt If Displacement of the Prosthesis Is Anticipated With the Least Displacing Forces Another Path of Insertion Should Be Decided
Slide 58 : 58 Prof. Dr. S.Venugopal. PROCEDURES of SURVEYING 3- Tilt the Cast Laterally Until Equal Retentive Areas Exist on the Principal Abutments 1- Placement of the Cast 2- Altering the Cast Position Anteroposteriorly To Provide Parallel Proximal Surfaces That May Act As Guiding Planes by 4- Eliminate Areas of Interference by Reshaping Tooth Surfaces 5- Permits a More Esthetic Placement of Clasp Arms Than the Other.
Slide 59 : 59 Prof. Dr. S.Venugopal. Tripoding the Cast Scoring the Cast
Slide 60 : 60 Prof. Dr. S.Venugopal. Tripoding Or Scoring are Performed While the Master Cast is Still Mounted on the Survey Table Without Changing the Tilt to Preserve the Established Cast Tilt
Slide 61 : 61 Prof. Dr. S.Venugopal.
Slide 62 : 62 Prof. Dr. S.Venugopal. Diagnostic survey
The diagnostic cast must be surveyed before the treatment plan for the patient can be formulated. Soft tissue contours must also be studied to determine what effect they may have on the partial denture that is being planned. Undercuts in the soft tissue areas may require surgical removal before the prosthesis will go to place in the mouth.
Slide 63 : THANK YOU My sir… with your preaching I am here and sharing the knowledge with the world of new dental doctors… 63 Prof. Dr. S.Venugopal.