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Autologous perichondral tissue for meniscal replacement

J Bruns1, J Kahrs, J Kampen

  • 1Department of Orthopaedic Surgery, University of Hamburg, Germany.

The Journal of Bone and Joint Surgery. British Volume
|October 13, 1998
PubMed
Summary

Autologous perichondral tissue shows potential for meniscal replacement, forming new menisci with normal structure but reduced mechanical strength. This offers a promising alternative to spontaneous regeneration after meniscectomy.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Regenerative Medicine

Background:

  • Meniscal tears are common injuries requiring surgical intervention.
  • Current treatments include meniscal repair, partial meniscectomy, or total meniscectomy, each with limitations.
  • Autologous perichondral tissue presents a potential source for meniscal tissue engineering.

Purpose of the Study:

  • To evaluate the efficacy of autologous perichondral tissue as a meniscal replacement in a sheep model.
  • To assess the histological, macroscopic, and biomechanical properties of the regenerated menisci.
  • To compare the outcomes of perichondral grafts with spontaneous tissue regeneration.

Main Methods:

  • Complete medial meniscectomy was performed in 18 mature sheep.

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  • 12 sheep received autologous perichondral tissue grafts (group G), while 6 served as controls (group C).
  • Animals were assessed at 3, 6, and 12 months post-surgery using gross examination, microscopy, SEM, and biomechanical testing.

    • Main Results:

    • Perichondral grafts successfully formed new menisci resembling native tissue in size and thickness by 3 months.
    • Histological analysis revealed normal collagen orientation and cellularity, though calcification occurred centrally.
    • SEM showed smooth surfaces, unlike the defects in control specimens; cartilage surfaces remained largely intact.
    • Biomechanical tests indicated lower failure stress and tensile modulus in regenerated menisci compared to native tissue.

    Conclusions:

    • Autologous perichondral tissue can regenerate into functional meniscal structures.
    • While structurally promising, the regenerated tissue exhibits reduced biomechanical strength.
    • Perichondral grafting offers a viable alternative to spontaneous regeneration, warranting further investigation for clinical application.