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Bioabsorbable screw fixation for the treatment of ankle fractures

  • Original article
  • Published:
Journal of Orthopaedic Science

Abstract

Background

Self-reinforced poly(l/dl)lactide 70:30 (SR-PLA70) retains its strength in bone for 24 weeks, whereas self-reinforced poly-l-lactide (SR-PLLA) retains its strength for over 36 weeks. In this prospective randomized study, bioabsorbable 4.5-mm SR-PLA70 screws were compared with SR-PLLA screws in the treatment of displaced ankle fractures in adults.

Methods

Sixty-two patients with ankle fractures needing operative treatment were randomized into two groups. Comminuted fractures needing plating were excluded. In total 54 of 62 patients were followed up for 1 year by clinical evaluation, radiographs, and Olerud-Molander score.

Results

The study groups differed significantly only in the mean duration of sick leave (SR-PLA70, 60 days; SR-PLLA, 65 days; P = 0.02). At the 1-year follow-up, syndesmotic ossification was more common in the SR-PLA70 group (5 versus 1 patient, not significant). Radiologically, the screw channel had not disappeared in any of the patients by the 1-year follow-up.

Conclusions

Both implant types proved to have good biocompatibility. SR-PLA70 and SR-PLLA screws are suitable in selected cases for the fixation of ankle fractures, but the mechanical stability of the fixation has to be carefully monitored perioperatively.

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Joukainen, A., Partio, E., Waris, P. et al. Bioabsorbable screw fixation for the treatment of ankle fractures. J Orthop Sci 12, 28–34 (2007). https://doi.org/10.1007/s00776-006-1077-y

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  • DOI: https://doi.org/10.1007/s00776-006-1077-y

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