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Related Experiment Videos

MR imaging in biofix-osteosynthesis.

M Lohman1, E K Partio, T Vehmas

  • 1Department of Radiology, Helsinki University Hospital, Finland.

Acta Radiologica (Stockholm, Sweden : 1987)
|July 8, 1999
PubMed
Summary
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Magnetic Resonance Imaging (MRI) can detect breakage in bioresorbable osteosynthesis implants made of self-reinforced poly-L-lactide (SR-PLLA) screws. This study confirms implant breakage is visible, addressing prior imaging discrepancies.

Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Radiology

Background:

  • Bioresorbable implants, primarily self-reinforced poly-L-lactide (SR-PLLA), are utilized for osteosynthesis.
  • A decade of human use has highlighted a discrepancy between histological findings of material fragmentation and radiological evidence of intact implants.

Purpose of the Study:

  • To investigate the controversy regarding the fragmentation of bioresorbable osteosynthesis materials.
  • To determine if radiological methods can detect the breaking of self-reinforced poly-L-lactide (SR-PLLA) screws.

Main Methods:

  • Six patients with malleolar fractures treated with SR-PLLA screws underwent 1.5 T Magnetic Resonance Imaging (MRI).
  • MRI scans were performed immediately post-surgery and at one to two-year follow-ups.

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Main Results:

  • All biodegradable SR-PLLA osteosynthetic screws were visible on MRI.
  • Out of 12 screws, 6 showed breakage at the final examination: 5 syndesmotic transfixation screws and 1 growth cartilage screw.

Conclusions:

  • Magnetic Resonance Imaging (MRI) is capable of documenting the breakage of bioresorbable osteosynthesis implants.
  • This study provides radiological evidence supporting histological findings of implant fragmentation.