Purpose: Several kinds of minimally invasive surgical techniques are applied to acute Achilles tendon rupture. The risks of sural never injury and re-ruptures are still major issues. The purpose of this study was to compare the middle-term results of two different minimally invasive repair techniques for acute Achille tendon rupture.
Methods: Twenty-four cases underwent the modified mini-incision "internal splinting" repair technique in group A, and 29 cases underwent a percutaneous repair technique in group B and were evaluated. The intra-operative data, complications, the time of recovery, and the post-operative magnetic resonance imaging were analyzed. At the final follow-up, the American Orthopedic Foot and Ankle Society (AOFAS) ankle-hindfoot score and Thermann score were evaluated.
Results: The mean follow-up time was 59.96 ± 4.16 months (range 48-67). At the final follow-up, the AOFAS score and Thermann score in both groups had similar feedback. No nerve injury, infection, or re-rupture was encountered in group A, except two cases with anchor irritation. One case with sural nerve injury and one with a re-rupture were recorded in group B, respectively. The final MRI showed thicker regeneration of the tendon in both groups.
Conclusions: The middle-term results indicated the modified mini-incision "internal splinting" technique for acute Achilles tendon rupture is similar to the percutaneous repair technique. A lower risk of sural nerve injury and re-rupture may be advantages.
Keywords: Achilles tendon rupture; Internal Splinting; Mini-incision; Percutaneous; Suture anchor.
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