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Executive | Lab Tech Talk

Anterior Bite Plate with Labial Bow and Two Clasps

Category:

Appliance Purpose / Function:

The Anterior Bite Plate is used to treat a deep bite. Working on the principle that an unapposed tooth will continue to erupt until it comes into contact with another surface, this appliance holds the anterior while allowing the posterior to erupt. An acrylic shelf is built into a maxillary plate in the anterior region where it will be contacted by the mandibular anteriors holding the bite open in the posterior region. This will cause the posterior teeth to erupt and open a deep bite.

Appliance Components:

  • Acrylic plate
  • Labial arch wire
  • Anterior bite plate
  • Two clasps of your choice

Suggested Materials:

  • Wire: Stainless-Steel wire
  • Dental Acrylic

Appliance Fabrication Standards:

ACRYLIC STANDARDS:

Palatal Acrylic-

  • Uniform overall thickness of approximately 2mm except in bite plate area (The models should be articulated and the bite plate trimmed to occlude evenly with the opposing teeth.)
  • Bite plate must be built up in anterior region to approximately level with the incisal edge of the anteriors (unless otherwise specified by Client), and must be a flat, level surface
  • All wires and inlay pictures completely encased in acrylic on lingual portion
  • Posterior border tapered towards the tissue with a rounded edge (thin, sharp knife-like edges not acceptable)
  • The tissue side of the plate is generally left alone unless otherwise requested by the Client, but it must be inspected for pits/voids or sharp areas. Pits/voids must be patched with acrylic, and sharp areas must be carefully ground smooth without removing too much acrylic

WIRE STANDARDS:

Designed with two clasps on the first molars and labial Bow; Clasping will depend on the Client’s preferences and the presence on bands.

Hawley Bow-

  • Contact all anteriors in middle 1/3 of labial surface (may need to be lower on mandibular Hawley to avoid interference w/maxillary anteriors)
  • Loops starting at canine prominence, 5-7mm long, positioned as close to tissue without touching as possible
  • Mesial and distal sides of loops parallel to each other forming a perfect “U”
  • Wire crossing occlusion distal to canine, wire must fit tightly in embrasure with no space underneath.
  • Wire must fit snugly into the lingual side of the embrasure and follow the contour of the tissue with 1mm of space between it and the tissue (this will allow acrylic to flow behind the wire and fully encase it. Do not leave too much space here as this will cause the acrylic to be too thick in order to cover the wire.)

Clasping-

  • Properly formed clasps for good retention.
  • Clasping must fit tightly into embrasure with no space underneath. If 2nd molars are not present, the wire must fit snugly

    • against the tissue to the distal of the first molars and extend over the patient’s alveolar ridge and into the palate where the acrylic is to be

  • A 5mm foot must be bent on the end of the wire for acrylic retention.