fixed appliances

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  • 1. ,;
  • 2. FIXED APPLIANCES IN ORTHODONTICS BY:SADIA NAEEM FINAL YEAR BDS ISRA UNIVERSITY
  • 3. CONTENTS Definition Indications Patient selection Contraindications Components Attachment Types
  • 4. OBJECTIVES What is a Fixed Orthodontic Appliance Indications & contraindications Components Attachment methods for fixed orthodontic appliances Various types of fixed orthodontic appliances
  • 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. 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. PATIENT SELECTION Patient maintains good oral hygiene. Must be co-operative. Attends appointments regularly to adjust the appliance.
  • 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. 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. 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. ACTIVE COMPONENTS These are the components which are capable of generating tooth moving forces: 1) Separators 2) Archwires 3) Springs 4) Elastics & elastomerics
  • 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
  • 13. VARIOUS TYPES OF SEPARATORS:
  • 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. IDEAL PROPERTIES 1. Spring back 2. Stiffness 3. Formability 4. Resilience 5. Biocompatibilty 6. Joinability 7. Least friction
  • 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. SPRINGS • Springs are mainly used for tooth uprighting & torquing. • Springs may be used to open spaces or to close spaces.