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Related Experiment Videos

Prototype testing for a new bioabsorbable Le Fort III distraction device: a pilot study.

Jaime Gateno1, Kelly Seymour-Dempsey, John F Teichgraeber

  • 1The University of Texas Health Science Center at Houston, Texas 77030, USA.

Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons
|December 2, 2004
PubMed
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Internal resorbable Le Fort III distractors failed in minipigs due to device breakage during distraction osteogenesis. Further design improvements are needed for these bioabsorbable devices.

Area of Science:

  • Craniofacial surgery
  • Biomaterials science
  • Regenerative medicine

Background:

  • Distraction osteogenesis is a surgical technique used to grow bone.
  • Internal distractors offer a less invasive approach for craniofacial reconstruction.
  • Bioresorbable materials present an alternative to permanent implants.

Purpose of the Study:

  • To design and test novel internal resorbable Le Fort III distractors.
  • To evaluate the efficacy of these devices in a juvenile minipig model.

Main Methods:

  • Le Fort III osteotomies were performed on three juvenile minipigs.
  • Internal bioabsorbable distractors were implanted.
  • A 12-day distraction period at 1 mm/day followed a 5-day latency period.
  • Cephalometric radiographs assessed distraction, and necropsy examined device integrity.

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Main Results:

  • The first prototype failed due to anterior footplate breakage.
  • The second prototype dislodged during the latency period.
  • The third prototype fractured at the posterior screw lines.
  • All three devices experienced mechanical failure during the study.

Conclusions:

  • Current bioabsorbable distractors cannot withstand the forces of distraction osteogenesis.
  • The prototype failures highlight the need for stronger bioresorbable materials.
  • Design modifications are necessary for successful internal bioresorbable Le Fort III distraction devices.