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. 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
- 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
- 21. STABILITY STABILITY RATIO = Stiffness in the undesired direction Stiffness in the desired direction 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
- 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
- 40. DOUBLE CANTILEVER SPRING (“Z” Spring) www.indiandentalacademy.com
- 41. DOUBLE CANTILEVER SPRING (“Z” Spring) 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
- 52. Reverse Loop Buccal Retractor (Helical Canine Retractor) www.indiandentalacademy.com