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UTILITY ARCH

  • MATERIALS AND DIMENSIONS OF WIRE
  • Blue elgiloy of 0.016 x 0.016 or 0.016 x 0.022 in an 0.022 slot is the material of choice. It can even be made with 0.014 or 0.018 round wires.
  • DESIGN
  •   All utility arches have a common design .
    • The molar segment.
    • The posterior vertical segment.
    • The vestibular segment.
    • The anterior vertical segment.
    • Incisal segment.
  • ) 30° to 45° Tip-back Applied to the Lower Molars & 30 ° to 45 ° of molar rotation
  • 2) 30° to 45° Buccal Root Torque Applied to the Lower Molar.
  • 3) Long Lever Arms Applied to the Lower Incisors. A slight labial root torque (5° to 10°) will free the apex of the lower incisor teeth from the lingual planum and allow its intrusion without labial flaring.
  • 4) 75 Grams of Intrusive Force Applied to the Lower Incisors

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