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FIXED ORTHODONTIC APPLIANCES - PowerPoint PPT Presentation


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FIXED ORTHODONTIC APPLIANCES. DENT 657. REMOVABLE Tipping only No control over root movement Pt’s co-operation Hygienic. FIXED Bodily translation Control of root movement Less dependent on pt’s co-op Less hygienic. Removable vs. Fixed Appliances.

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removable vs fixed appliances
REMOVABLE

Tipping only

No control over root movement

Pt’s co-operation

Hygienic

FIXED

Bodily translation

Control of root movement

Less dependent on pt’s co-op

Less hygienic

Removable vs. Fixed Appliances
development of fixed appliances
Development of Fixed appliances
  • Early fixed appliances
  • Late 1800s
  • Edward Angle
development of fixed appliances1
Development of Fixed appliances
  • Standard Edgewise appliance
  • Early 1900s
development of fixed appliances2
Development of Fixed appliances
  • Pre-adjusted edgewise appliance
  • 1970s
  • Refined manufacturing process with “built-in” adjustments specific for each tooth
  • Advances in material sciences made attachment much smaller
components of the fixed appliance
Components of the Fixed Appliance
  • Bands
  • Molar Tubes
  • Brackets
  • Buccal Tubes
  • Arch Wires
  • Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances
components of the fixed appliance1
Components of the Fixed Appliance
  • Bands
  • Molar Tubes
  • Brackets
  • Arch Wires
  • Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances
components of the fixed appliance2
Components of the Fixed Appliance
  • Bands
  • Molar Tubes
  • Brackets
  • Arch Wires
  • Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances
arch wires
ARCH WIRES
  • Maxillary and mandibular
  • Arch form described as “parabolic shaped”
  • Size and cross-section of wires vary
  • Material varies eg. Nickel Titanium alloy (NiTi), Titanium Molybdenum Alloy (TMA), Stainless Steel
components of the fixed appliance3
Components of the Fixed Appliance
  • Bands
  • Molar Tubes
  • Brackets
  • Arch Wires
  • Auxiliaries: Elastomeric products, Coil springs, Lingual arches, Extra-oral appliances
coil spring
Coil Spring

Closed or open coil springs

pre adjusted edgewise appliance or the straight wire appliance
Pre-Adjusted Edgewise Appliance or The Straight Wire Appliance
  • Larry Andrews - studied normal occlusion and individual tooth positions
  • Developed prescriptions for individual tooth position
  • Elements of “ideal” tooth position are built into the appliance
  • Minimizing active “wire manipulation” - The Straight Wire Concept
pre adjusted edgewise appliance
Pre-adjusted edgewise appliance
  • First order / in-out - Horizontal plane
  • Second order / tip - Mesio-distal angulation
  • Third order / torque - Labio-lingual angulation

3 - Dimensional control of tooth position

pre adjusted edgewise appliance1
Pre-adjusted edgewise appliance
  • First order / in-out - Horizontal plane
  • Second order / tip - Mesio-distal angulation
  • Third order / torque - Labio-lingual angulation
pre adjusted edgewise appliance2
Pre-adjusted edgewise appliance
  • First order / in-out - Horizontal plane
  • Second order / tip - Mesio-distal angulation
  • Third order / torque - Labio-lingual angulation
third order or torque

4

Third order or Torque

To “Torque” is the least efficient

tooth movement using orthodontic

appliances

significance of accurate bracket band positioning
Significance of accurate bracket/band positioning
  • Precise tooth positioning
  • Optimal effect of “pre-adjustment”
  • Occlusion
  • Esthetics
  • Stability
positioning brackets general instructions
POSITIONING BRACKETS - GENERAL INSTRUCTIONS

Rhomboidal shape

Disto-lingual wing mark

Central scribe line (long axis)