dental surveying

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By: drseta (46 month(s) ago)

hi good work.........can u send mea copy please ........this is help in teaching my friends the right meanings og surveying i am drseta my mail is setajorge1977@yahoo.com

By: drsvg (62 month(s) ago)

Most wecome dear doctor, and i can send you thru mail, and i dont know to keep this ppt as public and can save. Well give me your personal email id, and also let me know more about you. My personal email id is drsvg@hotmail.com or drsvg9@gmail.com More about me you can find from my website www.dentalhealth.in regards, venugopal

By: nelcrislap (61 month(s) ago)

Thank you so much for responding. I really appreciate and am honored by your willingness to share your ppt material. I have been teaching in the college for quite sometime now and am reviewing my lecture materials for improvement so tried the internet for some. I hope it's not such a bother to you to send . My email id is nelcrislap@yahoo.com and my school address is College of Dentistry, University of Baguio, Assumption Road, Baguio City. I teach Removable Partial Prosthodontics, Basic Oral Surgery, and Dental Materials. It's just been 2 semesters that I was asked to handle partial Prosthodontics so I am trying improve my materials. Well, I would be glad to learn more about you , too. Again, thank you so much and regards, Cris

 

Presentation Transcript

Assalaam waaleh kum… : 

1 Prof. Dr. S.Venugopal. Assalaam waaleh kum…

Surveying in REMOVABLE PROSTHODONTICS : 

2 Prof. Dr. S.Venugopal. Surveying in REMOVABLE PROSTHODONTICS Prof. Dr. S.Venugopal.

Slide 3: 

3 Prof. Dr. S.Venugopal. A dental cast surveyor has been defined as 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.

Aims & objectives : 

6 Prof. Dr. S.Venugopal. Aims & objectives Locate proximal tooth surfaces that are or can be made parallel to act as guiding surfaces. Locate and measure recesses or undercuts for mechanical retention. Identify areas of potential hard or soft tissue interferences. Determine a path of insertion/ dislodgement consistent with esthetic requirements. Determine the most advantageous path of insertion/ removal for the RPD.

Aims & objectives : 

7 Prof. Dr. S.Venugopal. 6. Delineate the height of contour of the abutment teeth and identify the areas of undercut that must be avoided, reduced, blocked out or preserved. 7. Help in planning restorative procedures . 8. Record the most ideal cast position for future reference. 9. Establish a formal plan for RPD design and the required mouth preparation. Aims & objectives

Undercut: : 

8 Prof. Dr. S.Venugopal. Undercut: An undercut is formed when the base of an object is smaller than its top Undercut Area

Where undercut!?!? : 

9 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 10: 

10 Prof. Dr. S.Venugopal. Non-undercut Area Undercut here

Slide 11: 

11 Prof. Dr. S.Venugopal. Types of undercuts Tooth Undercuts (Proximal undercuts) Soft Tissues or bony Undercuts(on lingual side of ridge)

Slide 12: 

12 Prof. Dr. S.Venugopal. 1-Desirable Undercuts : where used for retention 2-Undesirable Undercuts: Almost all undercuts in or other way… Types of undercuts

Slide 13: 

13 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 14: 

14 Prof. Dr. S.Venugopal.

Slide 15: 

15 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 16: 

16 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 17: 

17 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. It results from abnormal inclination of the tooth and is frequently found on the lingual surfaces of the lower teeth and buccal surfaces of the upper teeth. Blatterfein Classified survey lines

Slide 18: 

18 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 19: 

19 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 20: 

20 Prof. Dr. S.Venugopal. Diagonal Survey Line: Diagonal Survey line travels diagonally from near the occlusal surface in the near zone to the gingiva in the far zone. Blatterfein Classified survey lines

Slide 21: 

21 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 22: 

22 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 23: 

23 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 24: 

24 Prof. Dr. S.Venugopal. Ney Surveyor Jelenko Surveyor Dental Surveyor

Slide 25: 

25 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

Slide 26: 

26 Prof. Dr. S.Venugopal. Ney Surveyor Jelenko Surveyor Williams Surveyor The Retentoscope The Ticonium surveyor The Micro-Analyzer TYPES OF DENTAL SURVEYOR

Slide 27: 

27 Prof. Dr. S.Venugopal. Ney Surveyor Jelenko Surveyor Williams Surveyor The Retentoscope The Ticonium surveyor The Micro-Analyzer TYPES OF DENTAL SURVEYOR

Slide 28: 

28 Prof. Dr. S.Venugopal. Ney Surveyor Jelenko Surveyor Williams Surveyor The Retentoscope The Ticonium surveyor The Micro-Analyzer TYPES OF DENTAL SURVEYOR

Slide 29: 

29 Prof. Dr. S.Venugopal. Ney Surveyor Jelenko Surveyor Williams Surveyor The Retentoscope The Ticonium surveyor The Micro-Analyzer TYPES OF DENTAL SURVEYOR

Slide 30: 

30 Prof. Dr. S.Venugopal. Ney Surveyor Jelenko Surveyor Williams Surveyor The Retentoscope The Ticonium surveyor The Micro-Analyzer TYPES OF DENTAL SURVEYOR

Slide 31: 

31 Prof. Dr. S.Venugopal. Ney Surveyor Jelenko Surveyor Williams Surveyor The Retentoscope The Ticonium surveyor The Micro-Analyzer TYPES OF DENTAL SURVEYOR

Slide 32: 

32 Prof. Dr. S.Venugopal. P-W rotary surveyor used to determine a hinge axis TYPES OF DENTAL SURVEYOR

Slide 33: 

33 Prof. Dr. S.Venugopal. Intraoral surveyor TYPES OF DENTAL SURVEYOR

Slide 34: 

34 Prof. Dr. S.Venugopal. Surveying Tools 3- Undercut Gauge 1- Analyzing Rods 4- Wax Trimmer 2- Carbon Marker

Slide 35: 

35 Prof. Dr. S.Venugopal. Analyzing Rod

Slide 36: 

36 Prof. Dr. S.Venugopal. Carbon Marker

Slide 37: 

37 Prof. Dr. S.Venugopal. Undercut Gauges

Slide 38: 

38 Prof. Dr. S.Venugopal. Undercut Gauge

Slide 39: 

39 Prof. Dr. S.Venugopal. Undercut Gauge

Slide 40: 

40 Prof. Dr. S.Venugopal. Wax Trimmer

OBJECTIVES OF SURVEYING: : 

41 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: : 

42 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

Slide 43: 

43 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 44: 

44 Prof. Dr. S.Venugopal. Recontouring the tooth surface Principles of Surveying

Slide 45: 

45 Prof. Dr. S.Venugopal. The Location of the Undercut Area Can Be Changed by Changing the Tilting Principles of Surveying

Slide 46: 

46 Prof. Dr. S.Venugopal. The location of the undercut area can be changed by tilting the cast anteriorly or lateral Principles of Surveying

Slide 47: 

47 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 48: 

48 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 49: 

49 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 50: 

50 Prof. Dr. S.Venugopal. Selection of the Path of Insertion Place the Clasp Tips in a Better Esthetic Position. Create Suitable Undercuts 2- Tilting the Cast to: Equalize Undercuts on both Sides of the Arch Undercut Areas Should Be Present at Both Zero Tilt and the New Tilt Gross Inclination of the Cast to Create Apparent Undercuts Should Be Avoided 1- A Rotating or Curved Path

Slide 51: 

51 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 52: 

52 Prof. Dr. S.Venugopal. Tripoding the Cast Scoring the Cast

Slide 53: 

53 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 54: 

54 Prof. Dr. S.Venugopal.

Slide 55: 

55 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 56: 

THANK YOU My sir… with your preaching I am here and sharing the knowledge with the world of new dental doctors… 56 Prof. Dr. S.Venugopal.