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Related Experiment Videos

Osseointegrated titanium implants for maxillofacial protraction in monkeys.

W M Smalley1, P A Shapiro, T H Hohl

  • 1Department of Orthodontics, School of Dentistry, University of Washington, Seattle.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|October 1, 1988
PubMed
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Titanium implants in monkey skulls enabled controlled maxillary protraction. This study demonstrates a novel method for guiding bone movement using surgical implants and traction appliances.

Area of Science:

  • Orthodontics
  • Craniofacial Surgery
  • Biomaterials Engineering

Background:

  • Maxillary hypoplasia presents significant challenges in craniofacial reconstruction.
  • Current methods for maxillary protraction often involve complex surgical procedures and external devices.

Purpose of the Study:

  • To evaluate the efficacy of titanium implants in supporting extraoral traction appliances for controlled maxillary protraction in a primate model.
  • To assess the stability of cranial implants during orthodontic force application.

Main Methods:

  • Surgical placement of titanium implants into maxillary, zygomatic, frontal, and occipital bones of four pigtail monkeys.
  • Attachment of extraoral traction appliances to implants after a 4-month healing period.
  • Application of controlled tensile force (600 gm/side) to induce maxillary anterior displacement.

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Main Results:

  • Significant skeletal protraction of the maxilla was achieved, averaging 8 mm.
  • The direction of maxillary protraction was controllable.
  • Facial and cranial implants demonstrated immobility throughout the experimental period.
  • Force application duration varied between 12 and 18 weeks depending on the animal.

Conclusions:

  • Titanium implants provide a stable and effective anchorage for extraoral traction appliances.
  • This technique allows for controlled and predictable maxillary protraction.
  • The findings support the potential of implant-supported appliances in treating craniofacial discrepancies.