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Related Experiment Videos

Vertical distraction osteogenesis in the human mandible: a prospective morphometric study.

Lisa R Amir1, Alfred G Becking, Andreas Jovanovic

  • 1Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, and Department of Oral & Maxillofacial Surgery, Gelderse Vallei Hospital, Ede, The Netherlands.

Clinical Oral Implants Research
|August 16, 2006
PubMed
Summary

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In elderly patients, a slower distraction rate of 0.5 mm/day for vertical bone augmentation in the mandible promotes faster bone healing. A minimum of 10 weeks of fixation is needed for gap closure.

Area of Science:

  • Oral and Maxillofacial Surgery
  • Regenerative Medicine
  • Biomaterials Science

Background:

  • Vertical distraction osteogenesis is a key technique for mandibular bone augmentation before dental implant placement.
  • Optimal distraction protocols for the human mandible remain largely unestablished.
  • This study addresses the need for evidence-based distraction parameters in elderly patients.

Purpose of the Study:

  • To investigate the impact of distraction rate and neutrofixation duration on bone formation and gap closure in the human mandible.
  • To determine the most effective distraction protocol for vertical bone augmentation in atrophic mandibles.

Main Methods:

  • Vertical distraction osteogenesis was performed on 16 edentulous patients (mean age 62 years) with atrophic mandibles.

Related Experiment Videos

  • Bone was distracted by approximately 10 mm at rates of 0.5 mm/day or 1 mm/day.
  • Bone biopsies were analyzed histologically and histomorphometrically after 7-20 weeks of neutrofixation.

    • Main Results:

    • All biopsies showed newly formed woven bone within the distraction gap.
    • A distraction rate of 0.5 mm/day resulted in significantly longer bone trabeculae and increased bone volume compared to 1 mm/day.
    • Complete gap bridging occurred in 2/3 of samples at 0.5 mm/day after 10 weeks, but not in the 1 mm/day group.

    Conclusions:

    • A distraction rate of 0.5 mm/day enhances osteogenesis in the mandibular distraction gap in elderly patients compared to 1 mm/day.
    • At least 10 weeks of neutrofixation is recommended for achieving complete closure of a 10 mm distraction gap.