Sdm presentation /certified fixed orthodontic courses by Indian dental academy

162 views

Published on


The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.

Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
162
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
1
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Sdm presentation /certified fixed orthodontic courses by Indian dental academy

  1. 1. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. NOBILITY IN THOUGHTS BELIEF IN ACTION AIMED IN THE RIGHT DIRECTION www.indiandentalacademy.com
  3. 3. INTRODUCTION TO THE FINITE ELEMENT METHOD ---- DR. CHETAN JAYADE ASST. PROF. DEPARTMENT OF ORTHODONTICS S.D.M. DENTAL COLLEGE www.indiandentalacademy.com
  4. 4. My involvement with FEM FEM Course at B.V.B, Hubli FEM Course at MSRSAS, Bangalore www.indiandentalacademy.com
  5. 5. Why the need for orthodontists to know about FEM? An increase in the scope for research A need for basic understanding about the engineering areas of application. www.indiandentalacademy.com
  6. 6. SCOPE OF THE TALK •An overview of FEA and it’s increasing role in research • To understand the capabilities and the limitations • The role of a clinician in a research study involving FEA •Studies in various branches of Medicine and dentistry involving FEA www.indiandentalacademy.com
  7. 7. SCOPE OF THE TALK •Usage of FEA in Orthodontics •Sources of understanding FEA •An introduction to Rapid Prototyping •Uses of Rapid Prototyping in Dentistry www.indiandentalacademy.com
  8. 8. BIOMEDICAL ENGINEERING An amalgamation of the medical and engineering specialties -- The human genome project -- CAD/ CAM and other computerised application areas www.indiandentalacademy.com
  9. 9. BIOMEDICAL ENGINEER ING Basic Research Combination www.indiandentalacademy.com Clinical
  10. 10. BASIC RESEARCH Experimental Numerical Analytical ---FEA ---NON-FEA www.indiandentalacademy.com
  11. 11. W HAT IS FEA? It is a means of discretizing a continuous structure into sub-domains called Finite Elements. www.indiandentalacademy.com
  12. 12. W HAT IS FEA? Essentially an attempt at simulating a physical object and analysing it’s behaviour subjected to various circumstances www.indiandentalacademy.com when
  13. 13. W FEA? HY • Accuracy •R eproducibility • No usage of materials • Generation of intra-material results www.indiandentalacademy.com
  14. 14. FINITE ELEMENT ANALYSIS(FEA) Termed by Clough in 1960 Gained popularity in the civil and the Aerospace industry www.indiandentalacademy.com
  15. 15. FINITE ELEMENT ANALYSIS(FEA) First introduced to the dental arena in the 1970’s Growth model documented by MOSS in 1980. www.indiandentalacademy.com
  16. 16. FINITE ELEMENT ANALYSIS(FEA) Current upsurge in interest due to a)Potential of applicability b)Desktop management www.indiandentalacademy.com
  17. 17. FINITE ELEMENT ANALYSIS(FEA) Basic steps--a)Pre-processing b)Processing c)Post-processing www.indiandentalacademy.com
  18. 18. FINITE ELEMENT ANALYSIS(FEA) Pre-Processing basically involves modelling of the structure being studied. Probably the most crucial step. www.indiandentalacademy.com
  19. 19. FINITE ELEMENT ANALYSIS(FEA) Pre-Processing --- Newer possibilities of modelling of complex structures a)3-D CT scanning b)3-D Laser scanner c)Voxel modelling www.indiandentalacademy.com
  20. 20. FINITE ELEMENT ANALYSIS(FEA) In Pre-processing, the structure being studied is discretised into smaller units termed the elements. Each element is free to get displaced in all the three planes of space. www.indiandentalacademy.com
  21. 21. www.indiandentalacademy.com
  22. 22. FINITE ELEMENT ANALYSIS(FEA) The element co-ordinates (x,y,z) can be either a) Global Co-ordinate system or b) The Local Co-ordinate system www.indiandentalacademy.com
  23. 23. FINITE ELEMENT ANALYSIS(FEA) Various categories of elements exist. Examples are --- Shell element ---Beam element ---Truss element etc. www.indiandentalacademy.com
  24. 24. FINITE ELEMENT ANALYSIS(FEA) EXAMPLES OF ELEMENTS www.indiandentalacademy.com
  25. 25. FINITE ELEMENT ANALYSIS(FEA) These elements are connected at certain points termed ‘Nodes’. The joining of elements into nodes and eliminating duplicate nodes is termed as “Meshing” www.indiandentalacademy.com
  26. 26. FINITE ELEMENT ANALYSIS(FEA) The mesh size is a crucial determinant of the accuracy of the result. However, it is inversely related to the time involved in the analysis. www.indiandentalacademy.com
  27. 27. FINITE ELEMENT ANALYSIS(FEA) The meshed model is now a free floating body. To simulate the exact structure, the material properties are assigned and boundary conditions enforced. www.indiandentalacademy.com
  28. 28. FINITE ELEMENT ANALYSIS(FEA) Material properties : The minimum properties to be assigned are a) The Modulus of elasticity and b)Poisson’s ratio. www.indiandentalacademy.com
  29. 29. FINITE ELEMENT ANALYSIS(FEA) Material properties : Modulus of elasticity(Young’s modulus)refers to the stiffness of the material within it’s elastic range. E = Stress Strain www.indiandentalacademy.com
  30. 30. FINITE ELEMENT ANALYSIS(FEA) Modulus of elasticity of dental structures are : a) Enamel --- 65 GPa b) Dentin -- 15 GPa c) Alveolar bone – 10 GPa d) Periodontal ligament – 0.05 GPa www.indiandentalacademy.com
  31. 31. FINITE ELEMENT ANALYSIS(FEA) Material properties : Poisson’s ratio denotes the strain imposed on the material relative to the axis of the load applied. P = Strain perp. to the force -----------------------------------Strain parallel to the force www.indiandentalacademy.com
  32. 32. FINITE ELEMENT ANALYSIS(FEA) Poisson’s ratio for dental structures are: a) Enamel -- 0.32 b) Dentin -- 0.28 c) Alveolar bone –- 0.33 d) Periodontal ligament-- 0.3 www.indiandentalacademy.com
  33. 33. FINITE ELEMENT ANALYSIS (FEA) After assigning the material properties, the material is constrained identical to the real situation. The freedom of the body to be displaced is termed as the “degrees of freedom”. Each element has six degrees of freedom. www.indiandentalacademy.com
  34. 34. FINITE ELEMENT ANALYSIS (FEA) The final step in Pre-processing is the application of loads. These can be either force or moments and be directed at any node in all the three planes of space. www.indiandentalacademy.com
  35. 35. www.indiandentalacademy.com
  36. 36. FINITE ELEMENT ANALYSIS(FEA) W hat Does The Computer Do Processing? a) Solving of differential equations. b) Assemblage into matrices c) Summation of the matrix equations www.indiandentalacademy.com During The
  37. 37. FINITE ELEMENT ANALYSIS(FEA) The equation for the simplest linear static analysis is represented as : [F] = {K} {u} The non-linear analysis is solved usually by what is termed as the “Newton-R aphson method” www.indiandentalacademy.com
  38. 38. FINITE ELEMENT ANALYSIS(FEA) Post-Processing -a) Graphical output b) Numerical output c) Animated output www.indiandentalacademy.com
  39. 39. FINITE ELEMENT ANALYSIS(FEA) Post-Processing -a) Graphical output b) Numerical output c) Animated output www.indiandentalacademy.com
  40. 40. www.indiandentalacademy.com
  41. 41. ROLE OF A MEDICAL OR A DENTAL PROFESSIONAL DUR ING A RESEAR W CH ORK INVOLVING FEA • Planning a feasible study • Software to be used • Type of Model – 2-D or 3-D • Type of analysis www.indiandentalacademy.com
  42. 42. ROLE OF A MEDICAL OR A DENTAL PROFESSIONAL DUR ING A RESEAR W CH ORK INVOLVING FEA Software to be used • Accuracy • Analysis modules • Mainframe capabilities www.indiandentalacademy.com
  43. 43. www.indiandentalacademy.com
  44. 44. www.indiandentalacademy.com
  45. 45. AREAS OF APPLICATIONS BIOMECHANICAL MECHANICAL Orthodontics Prosthodontics Oral Surgery Periodontics www.indiandentalacademy.com
  46. 46. AREAS OF APPLICATIONS ORTHODONTIC USAGE Alternative to cephalometry Growth assessment Stress pattern generation www.indiandentalacademy.com
  47. 47. AREAS OF APPLICATIONS ORTHODONTIC USAGE • Limitations of conventional cephalometry in establishing the exact areas of growth . • Advantages of FEM in Growth studies www.indiandentalacademy.com
  48. 48. AREAS OF APPLICATIONS ORTHODONTIC USAGE • Melvin Moss used the concept of Growth tensors. • Tensors, although being abstract entities, are able to pinpoint the extensions(strains) www.indiandentalacademy.com local growth
  49. 49. CONCEPT OF GROWTH TENSORS www.indiandentalacademy.com
  50. 50. CONCEPT OF GROWTH TENSORS www.indiandentalacademy.com
  51. 51. AREAS OF APPLICATIONS ORTHODONTIC USAGE Stress pattern generation --Nasomaxillary region Mandible and condyle Dento-alveolar Attachments and other materials www.indiandentalacademy.com
  52. 52. AREAS OF APPLICATIONS ORTHODONTIC USAGE Stress pattern generation --Nasomaxillary region www.indiandentalacademy.com
  53. 53. MODELLING OF THE MANDIBLE www.indiandentalacademy.com
  54. 54. ANALYSIS OF THE MANDIBLE www.indiandentalacademy.com
  55. 55. MODELLING OF HUMAN TEETH www.indiandentalacademy.com
  56. 56. MODELLING OF HUMAN TEETH www.indiandentalacademy.com
  57. 57. MODELLING OF HUMAN TEETH MODELLING OF HUMAN TEETH www.indiandentalacademy.com
  58. 58. MODELLING OF HUMAN TEETH www.indiandentalacademy.com
  59. 59. MODELLING OF HUMAN TEETH www.indiandentalacademy.com
  60. 60. LOSS OF ATTACHMENT AND IT’S RELATION TO THE M/F RATIOS www.indiandentalacademy.com
  61. 61. RELEVANCE OF USING TPA AS A SOURCE OF ANCHORAGE www.indiandentalacademy.com
  62. 62. MODELLING OF ORTHODONTIC BRACKETS www.indiandentalacademy.com
  63. 63. ANALYSIS OF STRESSES IN ORTHODONTIC BRACKETS www.indiandentalacademy.com
  64. 64. ANALYSIS OF STRESSES IN ORTHODONTIC BRACKETS AND ADHESIVES www.indiandentalacademy.com
  65. 65. F R A MODELLED STANDARD LOOP www.indiandentalacademy.com
  66. 66. DISPLACED SHAPE OF THE LOOP www.indiandentalacademy.com
  67. 67. T Loop and L loop with angulated legs www.indiandentalacademy.com
  68. 68. T Loop and L loop with angulated legs www.indiandentalacademy.com
  69. 69. A NEW FINDING www.indiandentalacademy.com
  70. 70. AREAS OF APPLICATIONS PR OSTHODONTIC USAGE Stress pattern generation --Edentulous jaws Complete dentures Over-dentures Crowns and Fixed partial dentures Implants www.indiandentalacademy.com
  71. 71. STRESS ANALYSIS OF A CAST RESTORATION www.indiandentalacademy.com
  72. 72. MODELLING OF AN IMPLANT IN THE MANDIBLE www.indiandentalacademy.com
  73. 73. ANALYSIS OF THE IMPLANT www.indiandentalacademy.com
  74. 74. AREAS OF APPLICATIONS OR AND MAXILLOFACIAL SURGERY AL Surgical stresses generated Stresses in the TMJ Distraction osteogenesis stresses www.indiandentalacademy.com
  75. 75. MODELLING OF THE HUMAN TMJ www.indiandentalacademy.com
  76. 76. THE MODELLED TMJ www.indiandentalacademy.com
  77. 77. ANALYSIS OF THE TMJ- NORMAL MOVEMENTS www.indiandentalacademy.com
  78. 78. ANALYSIS OF THE TMJ - ENFORCED MOVEMENTS www.indiandentalacademy.com
  79. 79. AREAS OF APPLICATIONS PERIODONTICS Stresses in the periodontium Changes due to loss of bone support Designing of oral resonators www.indiandentalacademy.com
  80. 80. ANALYSIS OF RESONATORS www.indiandentalacademy.com
  81. 81. USES OF FEA IN PALEONTOLOGY -- A MODELLED DINOSAUR CRANIUM www.indiandentalacademy.com
  82. 82. SOURCES OF DATA INTERNET – www.femur.wpi.edu www.anamedic.com www.feainfo.com TEXTS : - Chandrupatla et.al Lakshminarayan H.V Champion Jr. www.indiandentalacademy.com
  83. 83. RAPID PROTOTYPING This refers to the process of production of any physical object scanned via special devices. www.indiandentalacademy.com
  84. 84. RAPID PROTOTYPING USES: a) Instrument designing b) Maxillofacial surgery c) Implantology www.indiandentalacademy.com
  85. 85. RAPID PROTOTYPING Output generation a) 3-D printing b) Stereolithography c) Vacuum casting Facility of Rapid Prototyping available at the IISC, Bangalore www.indiandentalacademy.com
  86. 86. USES OF RAPID PROTOTYPING --CRANIOFACIAL DEFECTS www.indiandentalacademy.com
  87. 87. USES OF RAPID PROTOTYPING www.indiandentalacademy.com
  88. 88. APPLICATIONS OF RAPID PROTOTYPING www.indiandentalacademy.com
  89. 89. APPLICATIONS OF RAPID PROTOTYPING www.indiandentalacademy.com
  90. 90. CONCLUSION The interaction of Dental and Engineering fields is at a new helm; we have tried to initiate a fruitful togetherness. www.indiandentalacademy.com
  91. 91. THANK YOU www.indiandentalacademy.com

×