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Related Experiment Videos

Prefabricated osteomusculocutaneous flaps using calvarial bone: experimental study

T Tsukagoshi1, M O Yenidunya, Y Hosaka

  • 1Department of Plastic and Reconstructive Surgery, Showa University Faculty of Medicine, Tokyo, Japan.

Journal of Reconstructive Microsurgery
|November 18, 1998
PubMed
Summary

This study on prefabricated osteomusculocutaneous flaps in rats found that 14 days of prefabrication allowed for neovascularization without muscle atrophy. Longer prefabrication (28 days) led to muscle atrophy and nonviable bone, compromising flap viability.

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Area of Science:

  • Regenerative Medicine
  • Tissue Engineering
  • Surgical Innovation

Background:

  • Osteomusculocutaneous flaps are crucial for reconstructive surgery.
  • Optimizing prefabrication time is essential for flap survival and function.
  • Calvarial bone offers a potential source for these composite flaps.

Purpose of the Study:

  • To evaluate the impact of prefabrication time on the viability and histological characteristics of prefabricated osteomusculocutaneous flaps in a rat model.
  • To assess the success of transferring these flaps as island and free flaps.
  • To determine the optimal prefabrication period for successful neovascularization and tissue integration.

Main Methods:

  • A rat model was used to create prefabricated osteomusculocutaneous flaps with free calvarial bone.

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  • Animals were divided into two groups based on prefabrication time: 14 days (Group 1) and 28 days (Group 2).
  • Flaps were evaluated histopathologically and macroscopically for neovascularization, muscle atrophy, bone viability, and overall survival after transfer.

    • Main Results:

    • Neovascularization was observed in 90% of flaps at 14 days and 100% at 28 days.
    • The 14-day group showed muscles without atrophy and viable osteocytes, while the 28-day group exhibited muscle atrophy and nonviable bone.
    • All island flaps survived, but two free flaps failed due to technical errors; neovascularization was evident by 2 weeks, but muscle atrophy occurred by 4 weeks.

    Conclusions:

    • A 14-day prefabrication period appears optimal for prefabricated osteomusculocutaneous flaps, promoting neovascularization without detrimental muscle atrophy.
    • Extended prefabrication (28 days) leads to tissue degeneration, compromising flap viability.
    • This study suggests that utilizing only the outer table of calvarial bone might be a viable clinical approach, warranting further investigation.