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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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  • 1. SPRINGS INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  • 2. SPRINGS • Springs are a part of the active components of removable orthodontic appliances used to bring about tooth movement. www.indiandentalacademy.com
  • 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. 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. • 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. REQUIREMENTS OF A SPRING • • • • Simple to fabricate Easily adjustable No discomfort to the patient Be easily kept clean www.indiandentalacademy.com
  • 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. STRESS STRESS, STRAIN YEILD POINT, FAILURE POINT STRAIN www.indiandentalacademy.com
  • 9. STRESS STRESS STRENGTH STRAIN STRAIN www.indiandentalacademy.com
  • 10. STRESS STRESS STIFFNESS STRAIN STRAIN www.indiandentalacademy.com
  • 11. STRESS (LOAD) STRESS (LOAD) RANGE STRAIN (DEFLECTION) STRAIN (DEFLECTION) www.indiandentalacademy.com
  • 12. STRESS (LOAD) FORMABILITY STRAIN (DEFLECTION) www.indiandentalacademy.com
  • 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. Force Fα D 3 L 4 F: Force D: Diameter of wire L: Length of wire www.indiandentalacademy.com
  • 15. Incorporation of coils and loops www.indiandentalacademy.com
  • 16. Direction and type of tooth movement www.indiandentalacademy.com
  • 17. www.indiandentalacademy.com
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  • 20. www.indiandentalacademy.com
  • 21. STABILITY STABILITY RATIO = Stiffness in the undesired direction Stiffness in the desired direction www.indiandentalacademy.com
  • 22. www.indiandentalacademy.com
  • 23. STABILITY www.indiandentalacademy.com
  • 24. www.indiandentalacademy.com
  • 25. www.indiandentalacademy.com
  • 26. Stability: Utilization of undercuts www.indiandentalacademy.com
  • 27. Stability Stability of a spring can be improved by • Guarding with a wire • Protecting the spring with acrylic www.indiandentalacademy.com
  • 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. FINGER SPRING www.indiandentalacademy.com
  • 30. FINGER SPRING www.indiandentalacademy.com
  • 31. www.indiandentalacademy.com
  • 32. www.indiandentalacademy.com
  • 33. Placement of coil www.indiandentalacademy.com
  • 34. Activation of finger spring www.indiandentalacademy.com
  • 35. STRESS(LOAD) STRESS(LOAD) Activation and its relation to the thickness of the wire STRAIN (DEFLECTION) STRAIN (DEFLECTION) www.indiandentalacademy.com
  • 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. Stability: Guarding the spring www.indiandentalacademy.com
  • 38. SINGLE CANTILEVER SPRING www.indiandentalacademy.com
  • 39. ACTIVATION www.indiandentalacademy.com
  • 40. DOUBLE CANTILEVER SPRING (“Z” Spring) www.indiandentalacademy.com
  • 41. DOUBLE CANTILEVER SPRING (“Z” Spring) www.indiandentalacademy.com
  • 42. ACTIVATION www.indiandentalacademy.com
  • 43. STABILIZATION www.indiandentalacademy.com
  • 44. T-Spring www.indiandentalacademy.com
  • 45. Activation www.indiandentalacademy.com
  • 46. Coffin Spring www.indiandentalacademy.com
  • 47. www.indiandentalacademy.com
  • 48. CANINE RETRACTORS • • • • Buccal canine retractor Reverse loop buccal retractor U-loop canine retractor Palatal canine retractor www.indiandentalacademy.com
  • 49. Self Supported Buccal Canine Retractor www.indiandentalacademy.com
  • 50. Supported Buccal Canine Retractor www.indiandentalacademy.com
  • 51. ACTIVATION www.indiandentalacademy.com
  • 52. Reverse Loop Buccal Retractor (Helical Canine Retractor) www.indiandentalacademy.com
  • 53. ACTIVATION www.indiandentalacademy.com
  • 54. ACTIVATION www.indiandentalacademy.com
  • 55. U-Loop canine retractor www.indiandentalacademy.com
  • 56. Activation www.indiandentalacademy.com
  • 57. Palatal Canine Retractor www.indiandentalacademy.com
  • 58. THANK YOU www.indiandentalacademy.com
  • 59. www.indiandentalacademy.com