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Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 27, Issue 12, pp 3962–3969 | Cite as

The new LassoLoop360° technique for biomechanically superior tissue grip

  • Sebastian MüllerEmail author
  • Rebekka Flury
  • Simon Zimmermann
  • Michael de Wild
  • Simon Fogerty
  • Laurent Lafosse
  • Vito Bongiorno
  • Claudio Rosso
SHOULDER
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Abstract

Purpose

Suprapectoral tenodesis is a frequently used technique for treating pathologies of the long head of the biceps brachii (LHBB) tendon. However, so far, no Gold Standard treatment exist. Hence, the arthroscopic LassoLoop360 (LL360) technique is introduced aiming to provide secure fixation and improved biomechanical properties. It was hypothesized, that the LL360 technique would show superior biomechanical response to cyclic loading and ultimate load-to-failure testing compared to the commonly used simple Lasso Loop (SLL).

Methods

Twenty-two porcine superficial flexor digitorum tendons were prepared using a No. 2 suture according to either the SLL or the LL360 technique. Displacement after cyclic loading (1.000 cycles) between 5 and 30 N, ultimate load-to-failure (ULTF), mode of failure as well as the construct stiffness were tested.

Results

Significantly less displacement was found in the LL360 group (SLL 2.25 ± 0.51 mm; LL360 1.67 ± 0.37 mm; p = 0.01). Ultimate Load to Failure was significantly higher in the LL360 (168.6 ± 29.6 N) as compared to the SLL (124.1 ± 25.8 N, p = 0.02). The LL360 also revealed a significant higher stiffness compared to the SLL (SLL 13.1 ± 0.9 N/mm vs. LL360 19.1 ± 1.0 N/mm, p < 0.001). The most common mode of failure was the suture cutting through the tendon, with a significantly less suture cutting through for the LL360 compared with the SLL (p < 0.05).

Conclusion

The LassoLoop360-technique offers superior biomechanical characteristics regarding the tendon-suture-interface compared to the SLL. In the initial healing phase, the suture-tendon-interface is the most vulnerable part of the tendon-suture-anchor construct, the aim of this new technique is to reduce this weakest part of the chain (Ponce et al., Am J Sports Med 39:188–194, 2011). This technique may therefore be beneficial for arthroscopic suprapectoral biceps tenodesis at the entrance of the bicipital groove.

Keywords

Long Head of the biceps brachii (LHBB) tendon Suprapectoral tenodesis Biomechanics Biomechanical testing Single-Lasso-Loop (SLL) LassoLoop360 (LL360) 

Notes

Authors contribution

SM, RF and CR had full access to all the data presented in this study and take responsibility for the integrity and accurracy of the data. Conception and design: SM, RF, SZ, MD, LL, VB, CR. Collection and assembly of the data: SM, RF, SZ, MD, CR. Analysis and interpretation of the data: SM, RF, MD, CR. Drafting of the article: SM, CR. Critical revision of the article for important intellectual content AND final approval of the article: SM, RF, SZ, MD, LL, VB, CR. Provisions of study materials: SM, CR.

Funding

No funding source.

Compliance with ethical standards

Conflict of interest

All authors declare, that they have no competing interest.

Ethical approval

All porcine samples were collected from a local slaughterhouse and all animals were slaughtered for meat production and not for study purposes. Hence, approval of the Ethical Committee was not necessary.

Supplementary material

Supplementary material 1 (MP4 9990 kb)

167_2019_5604_MOESM2_ESM.docx (11 kb)
Supplementary material 2 (DOCX 10 kb)

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Copyright information

© European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2019

Authors and Affiliations

  • Sebastian Müller
    • 1
    • 2
    Email author
  • Rebekka Flury
    • 2
  • Simon Zimmermann
    • 3
  • Michael de Wild
    • 3
  • Simon Fogerty
    • 4
  • Laurent Lafosse
    • 5
  • Vito Bongiorno
    • 6
  • Claudio Rosso
    • 2
    • 7
  1. 1.Department of Orthopaedics and TraumatologyUniversity Hospital BaselBaselSwitzerland
  2. 2.University of BaselBaselSwitzerland
  3. 3.School of Life Sciences, Institute for Medical and Analytical TechnologiesUniversity of Applied Sciences Northwestern SwitzerlandMuttenzSwitzerland
  4. 4.Shoulder Clinic Calderdale and Huddersfield NHS TrustHuddersfieldUK
  5. 5.ALPS Surgery Institute, Clinique GénéraleAnnecyFrance
  6. 6.Polyclinique Notre Dame DraguignanDraguignanFrance
  7. 7.ARTHRO Medics, Shoulder and Elbow CenterBaselSwitzerland

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