Springs /certified fixed orthodontic courses by Indian dental academy

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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


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Springs /certified fixed orthodontic courses by Indian dental academy

  1. 1. SPRINGS INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. SPRINGS • Springs are a part of the active components of removable orthodontic appliances used to bring about tooth movement. www.indiandentalacademy.com
  3. 3. • To bring about tooth movement, always use light and continuous forces • Heavy forces damage the periodontium, bring about root resorption etc. • LOW AND STEADY WINS THE RACE www.indiandentalacademy.com
  4. 4. CLASSIFICATION • Acc. to C P Adams  Self supporting springs  Protected and guided springs • Acc. to Houston & Isaacson  Buccal spring  Palatal spring www.indiandentalacademy.com
  5. 5. • Acc. to S J Chaconas Labial wire spring Free ended spring Accessory spring • Acc. to Graber and Neuman • Closed or continuous loop spring • Free ended spring www.indiandentalacademy.com
  6. 6. REQUIREMENTS OF A SPRING • • • • Simple to fabricate Easily adjustable No discomfort to the patient Be easily kept clean www.indiandentalacademy.com
  7. 7. REQUIREMENTS OF A SPRING • • • • • Apply forces of required magnitude Apply forces in required direction Be robust Be stable (i.e. not slip) Should move the tooth through the required distance www.indiandentalacademy.com
  8. 8. STRESS STRESS, STRAIN YEILD POINT, FAILURE POINT STRAIN www.indiandentalacademy.com
  9. 9. STRESS STRESS STRENGTH STRAIN STRAIN www.indiandentalacademy.com
  10. 10. STRESS STRESS STIFFNESS STRAIN STRAIN www.indiandentalacademy.com
  11. 11. STRESS (LOAD) STRESS (LOAD) RANGE STRAIN (DEFLECTION) STRAIN (DEFLECTION) www.indiandentalacademy.com
  12. 12. STRESS (LOAD) FORMABILITY STRAIN (DEFLECTION) www.indiandentalacademy.com
  13. 13. Factors to be considered when designing a spring • Force to be applied • Direction and type of tooth movement • Stability of the spring www.indiandentalacademy.com
  14. 14. Force Fα D 3 L 4 F: Force D: Diameter of wire L: Length of wire www.indiandentalacademy.com
  15. 15. Incorporation of coils and loops www.indiandentalacademy.com
  16. 16. Direction and type of tooth movement www.indiandentalacademy.com
  17. 17. www.indiandentalacademy.com
  18. 18. www.indiandentalacademy.com
  19. 19. www.indiandentalacademy.com
  20. 20. www.indiandentalacademy.com
  21. 21. STABILITY STABILITY RATIO = Stiffness in the undesired direction Stiffness in the desired direction www.indiandentalacademy.com
  22. 22. www.indiandentalacademy.com
  23. 23. STABILITY www.indiandentalacademy.com
  24. 24. www.indiandentalacademy.com
  25. 25. www.indiandentalacademy.com
  26. 26. Stability: Utilization of undercuts www.indiandentalacademy.com
  27. 27. Stability Stability of a spring can be improved by • Guarding with a wire • Protecting the spring with acrylic www.indiandentalacademy.com
  28. 28. REQUIREMENTS OF A SPRING • • • • • Apply forces of required magnitude Apply forces in required direction Be robust Be stable (i.e. not slip) Should move the tooth through the required distance www.indiandentalacademy.com
  29. 29. FINGER SPRING www.indiandentalacademy.com
  30. 30. FINGER SPRING www.indiandentalacademy.com
  31. 31. www.indiandentalacademy.com
  32. 32. www.indiandentalacademy.com
  33. 33. Placement of coil www.indiandentalacademy.com
  34. 34. Activation of finger spring www.indiandentalacademy.com
  35. 35. STRESS(LOAD) STRESS(LOAD) Activation and its relation to the thickness of the wire STRAIN (DEFLECTION) STRAIN (DEFLECTION) www.indiandentalacademy.com
  36. 36. REQUIREMENTS OF A SPRING • • • • • Apply forces of required magnitude Apply forces in required direction Be robust Be stable (i.e. not slip) Should move the tooth through the required distance www.indiandentalacademy.com
  37. 37. Stability: Guarding the spring www.indiandentalacademy.com
  38. 38. SINGLE CANTILEVER SPRING www.indiandentalacademy.com
  39. 39. ACTIVATION www.indiandentalacademy.com
  40. 40. DOUBLE CANTILEVER SPRING (“Z” Spring) www.indiandentalacademy.com
  41. 41. DOUBLE CANTILEVER SPRING (“Z” Spring) www.indiandentalacademy.com
  42. 42. ACTIVATION www.indiandentalacademy.com
  43. 43. STABILIZATION www.indiandentalacademy.com
  44. 44. T-Spring www.indiandentalacademy.com
  45. 45. Activation www.indiandentalacademy.com
  46. 46. Coffin Spring www.indiandentalacademy.com
  47. 47. www.indiandentalacademy.com
  48. 48. CANINE RETRACTORS • • • • Buccal canine retractor Reverse loop buccal retractor U-loop canine retractor Palatal canine retractor www.indiandentalacademy.com
  49. 49. Self Supported Buccal Canine Retractor www.indiandentalacademy.com
  50. 50. Supported Buccal Canine Retractor www.indiandentalacademy.com
  51. 51. ACTIVATION www.indiandentalacademy.com
  52. 52. Reverse Loop Buccal Retractor (Helical Canine Retractor) www.indiandentalacademy.com
  53. 53. ACTIVATION www.indiandentalacademy.com
  54. 54. ACTIVATION www.indiandentalacademy.com
  55. 55. U-Loop canine retractor www.indiandentalacademy.com
  56. 56. Activation www.indiandentalacademy.com
  57. 57. Palatal Canine Retractor www.indiandentalacademy.com
  58. 58. THANK YOU www.indiandentalacademy.com
  59. 59. www.indiandentalacademy.com

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