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The lasso-loop, lasso-mattress and simple-cinch stitch for arthroscopic rotator cuff repair: are there biomechanical differences?

  • Arthroscopy and Sports Medicine
  • Published:
Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Purpose

Various stitching techniques have been described to facilitate arthroscopic repair of rotator cuff tears. The aim of the present study was to compare the biomechanical properties of the lasso-loop, lasso-mattress and simple-cinch stitch for rotator cuff repair.

Methods

Twelve infraspinatus tendons were harvested from sheep and split in half. The tendons were randomized into three different stitch configuration groups for biomechanical testing: lasso-loop, lasso-mattress and simple-cinch stitch. Each specimen was first cyclically loaded on a universal materials testing machine under force control from 5 to 30 N at 0.25 Hz for twenty cycles. Then, each specimen was loaded to failure under displacement control at a rate of 1 mm/s. Cyclic elongation, peak-to-peak displacement and ultimate tensile load were reported as mean ± standard error and compared using one way analysis of variance. The type of failure was recorded.

Results

No differences in cyclic elongation (1.31 ± 0.09 mm for the simple-cinch vs. 1.49 ± 0.07 mm for the lasso-mattress vs. 1.61 ± 0.09 mm for the lasso-loop stitch, p = 0.063) or peak-to-peak displacement (0.58 ± 0.04 mm for the simple-cinch, 0.50 ± 0.03 mm for the lasso-mattress and 0.62 ± 0.06 mm for the lasso-loop stitch, p = 0.141) were seen between all tested stitch configurations. In the load-to-failure test, the simple cinch stitch (149.38 ± 11.89 N) and the lasso-mattress (149.38 ± 10.33 N) stitch demonstrated significantly higher ultimate load than the lasso-loop stitch (65.88 ± 4.75 N, p < 0.001). All stitch configurations failed with suture pull out.

Conclusions

The lasso-mattress and the simple-cinch stitch showed similar biomechanical properties with significant higher tensile loads needed for failure than the lasso-loop stitch.

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Acknowledgments

Funding awarded by the Alwin Jaeger Foundation (Aschaffenburg, Germany) was used for all materials required for performing this experimental study.

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Authors and Affiliations

  1. Trauma Department, Hannover Medical School (MHH), Carl-Neuberg-Str. 1, 30625, Hannover, Germany

    Emmanouil Liodakis, Antonios Dratzidis, Christian Krettek, Mohamed Omar, Rupert Meller & Nael Hawi

  2. Orthopaedic and Surgical Clinic Braunschweig (OCP), Brunswick, Germany

    Ahmed Hawi

  3. Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic Surgery, Hannover Medical School (MHH), Hannover, Germany

    Manuel Kraemer & Christof Hurschler

Authors
  1. Emmanouil Liodakis
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  2. Antonios Dratzidis
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  3. Manuel Kraemer
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  6. Ahmed Hawi
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  9. Nael Hawi
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Correspondence to Emmanouil Liodakis.

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Liodakis, E., Dratzidis, A., Kraemer, M. et al. The lasso-loop, lasso-mattress and simple-cinch stitch for arthroscopic rotator cuff repair: are there biomechanical differences?. Arch Orthop Trauma Surg 136, 1581–1585 (2016). https://doi.org/10.1007/s00402-016-2540-7

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