Proper Fit for Aligners

Properly fitting aligners should cover the teeth and fit snugly against the patient’s teeth. They may feel a little tight at first.

  • The aligner should usually cover the gingival by at least 1–3 millimeters (aligners may be trimmed differently to compensate for undercuts, black triangles, recession, bridges, etc.).
  • The incisal edges of the teeth should fit flush against the aligners without any gaps
  • The aligners should fit snugly over the distal surfaces of the rearmost molars if the aligner extends that far back.
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