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fixed appliances

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fixed appliances

  1. 1. ,;
  3. 3. CONTENTS Definition Indications Patient selection Contraindications Components Attachment Types
  4. 4. OBJECTIVES What is a Fixed Orthodontic Appliance Indications & contraindications Components Attachment methods for fixed orthodontic appliances Various types of fixed orthodontic appliances
  5. 5. DEFINITION Appliances that are attached to teeth Surfaces & are capable to Generate a range of tooth movement & can be removed by the Orthodontists at the end of treatment. (Marina koletis , Health Sciences , August 29 , 2012)
  6. 6. INDICATIONS Fixed orthodontic appliances are indicated whenever multiple tooth movement is required: Intrusion De-rotation Controlled space closure at extraction sites Bodily movement Extrusion Torque control etc.
  7. 7. PATIENT SELECTION Patient maintains good oral hygiene. Must be co-operative. Attends appointments regularly to adjust the appliance.
  8. 8. CONTRAINDICATIONS Poorly motivated patient: Patient should understand that his/her cooperation will be required throughout the treatment. Poor dental health: A patient, who does not maintain oral hygiene routinely, cannot be expected to maintain the stringent oral hygiene procedures required with fixed appliances.
  9. 9. Mal-occlusions beyond the scope of fixed orthodontic appliances: Mal-occlusions that are skeletal or otherwise beyond the scope of orthodontics should not be attempted.
  10. 10. COMPONENTS OF FIXED ORTHODONTIC APPLIANCES: Components which form any Fixed Orthodontic Appliance System are divided into two categories depending upon their ability to generate forces: 1. Active Components 2. Passive Components
  11. 11. ACTIVE COMPONENTS These are the components which are capable of generating tooth moving forces: 1) Separators 2) Archwires 3) Springs 4) Elastics & elastomerics
  12. 12. SEPARATORS Separators are used to create spaces between two adjacent teeth, generally for the purpose of banding. There are various types of separators: a) Brass wire separators b) Kesling’s spring separators c) Ring separators d) Dumbbell separators METAL SEPARATORS RUBBER SEPARATORS
  14. 14. ARCHWIRES One of the active components. They can bring about various tooth movements through the medium of brackets & buccal tubes, which act as handles on the teeth.
  15. 15. IDEAL PROPERTIES 1. Spring back 2. Stiffness 3. Formability 4. Resilience 5. Biocompatibilty 6. Joinability 7. Least friction
  16. 16. Classification of Arch Wires • BASED ON MATERIAL USED: 1. Gold & gold alloys 2. Stainless steel 3. Nickel titanium alloys 4. Beta titanium 5. Cobalt chromium nickel alloys 6. Optiflex arch wires • BASED ON CROSS SECTION: 1. Round 2. Square 3. Rectangular 4. Multistranded
  17. 17. SPRINGS • Springs are mainly used for tooth uprighting & torquing. • Springs may be used to open spaces or to close spaces.