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Fixed appliances

Fixed appliances. Development of orthodontics in china. Removable Begg Edgewise Straightwire (pre-adjusted). Bracket. Metal Ceramic Plastic. Disadvantages of ceramic brackets. The bond is too strong Brittle Too hard High friction. Band.

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Fixed appliances

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  1. Fixed appliances

  2. Development of orthodontics in china • Removable • Begg • Edgewise • Straightwire (pre-adjusted)

  3. Bracket • Metal • Ceramic • Plastic

  4. Disadvantages of ceramic brackets • The bond is too strong • Brittle • Too hard • High friction

  5. Band • (1) Buccal and often lingual attachments are soldered or welded. • (2) Piror to placement of a band it may be necessary to separate the adjacent tooth contacts. • (3) There are different sizes of bands for different sizes of molar. • (4) Glass ionomer cement is used for band cementation.

  6. Archwires • Stainless steel wire • NiTi wire • Mutistrand wire

  7. Round wire: 0.014”,16”,18” • Rectangular wire:0.016”x0.022”,et al.

  8. Sequence • From thin to thick • From NiTi to stainless steel • From round to rectangular

  9. First-order bends: horizontal plane • Second-order bends: vertical plane • Third-order bends: torque

  10. Orthodontic adhesives • Band cement: glass ionomer, zinc phosphate • Bonding adhesive: chemical-cured, light-cured

  11. Chemical-cured adhesive • One-paste • Two-paste

  12. A set of bonding adhesive • Paste A • Paste B • Sealant A • Sealant B • Etching solution

  13. Bonding procedure • Clean the teeth • Etch the teeth • paint the sealant mixture • paint the paste mixture • place the brackets

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