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Supraspinatus tendon transosseous vs anchor repair surgery: a comparative study of mechanical recovery in the rabbit

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Background: Supraspinatus (SSP) tendon ruptures requiring surgical repair are common. Arthroscopic suture
anchor fixation has gradually replaced transosseous repair in supraspinatus tendon tear. Our objective was to
compare mechanical properties between transosseous and anchor supraspinatus repair in the first 6 postoperative
weeks in a rabbit model.
Methods: One hundred and fifty-two rabbits had one supraspinatus tendon repaired either with an anchor suture
1 week after detachment or with transosseous sutures. Rabbits were euthanized at 0, 1, 2, 4 or 6 postoperative
weeks. Experimental and contralateral tendons (304 tendons) were mechanically tested to failure. Data are
expressed as percent of contralateral.
Results: Anchor repair had higher loads to failure compared to transosseous repair, at immediate repair (week 0, 52
± 21% vs 25 ± 17%, respectively; p = 0.004) and at 1 postoperative week (64 ± 32% vs 28 ± 10%; p = 0.003) with
no difference after 2 weeks. There was no difference in stiffness. Transosseous repairs showed higher rates of
midsubstance failures compared to anchor repairs at 1 (p = 0.004) and 2 postoperative weeks (p < 0.001). Both
transosseous and anchor repairs restored supraspinatus mechanical properties after 4 postoperative weeks.
Conclusion: Anchor repair provided better initial tensile strength while transosseous repair led to a faster
normalization (namely, midsubstance) of the mode of failure. Research to optimize supraspinatus repair may need
to consider the advantages from both surgical approaches

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Journal of Orthopaedic Surgery and Research, 2020, vol. 15

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Articles publicats en revistes (Institut d'lnvestigació Biomèdica de Bellvitge (IDIBELL))

# metadata.dc.title[].value
Supraspinatus tendon transosseous vs anchor repair surgery: a comparative study of mechanical recovery in the rabbit