McNamara Twin Block

Dr. James McNamara, from the University of Michigan, modified the Twin Block by adding acrylic to the lower labial bow for additional retention.

The appliance also utilizes ball clasp on the lower arch for retention. Expansion screws can be added to the upper or lower if lateral arch development is required.

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Clasping

Standard:

  • Upper: Ball Clasps and Adam Clasps
  • Lower: Mixed Dentition/Permanent Dentition: Labial Bow with Acrylic and 1 pair of Ball Clasps

Optional:

  • Fully customizable

Screws

Standard:

  • None

Optional:

  • Midline Screw(s)
  • Saggital Screw(s)

Functional Options

  • Design to open
  • Maintain
  • Design to close

Acrylic Options

  • Please note that only the Specialty Appliances standard colors may be selected. No custom designs.

Arch Options

  • N/A

FAQs About Functional Appliances