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Summary

Computer-aided design/computer-aided manufacturing (CAD/CAM) archwires effectively correct posterior crossbite through dentoalveolar compensation in both jaws. This technology achieves planned transverse corrections, proving efficient even for severe cases.

Keywords:
Expansion/compression archwiresFixed orthodontic appliancesLingual orthodonticsMandibular compressionPalatal expansion technique

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Area of Science:

  • Orthodontics
  • Dental Biomaterials
  • Biomechanical Engineering

Background:

  • Posterior crossbite affects dental occlusion and facial aesthetics.
  • Dentoalveolar compensation is a key strategy for correcting transverse discrepancies.
  • Computer-aided design/computer-aided manufacturing (CAD/CAM) offers precise customization in orthodontic appliances.

Purpose of the Study:

  • To evaluate the efficiency of CAD/CAM expansion and compression archwires for posterior crossbite correction.
  • To assess dentoalveolar compensation involving both jaws.
  • To test if achieved transverse correction matches planned corrections.

Main Methods:

  • Retrospective study of 64 patients with posterior crossbite (mean age 23.5 years).
  • Used CAD/CAM customized lingual appliances with expansion/compression archwires.
  • Compared pre- and post-treatment plaster casts (T1 and T2) against the treatment plan using statistical equivalence tests.

Main Results:

  • All posterior crossbites were successfully corrected via dentoalveolar compensation.
  • Mean total correction was 6.9 mm (maxillary expansion 4.3 mm, mandibular compression 2.6 mm).
  • Achieved transverse corrections were equivalent to planned corrections (p < 0.001).

Conclusions:

  • CAD/CAM expansion and compression archwires are efficient for posterior crossbite correction.
  • This method achieves desired transverse corrections, even in severe cases.
  • Dentoalveolar compensation involving both jaws is effective with CAD/CAM technology.