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Archives of Orthopaedic and Trauma Surgery
Published in: Archives of Orthopaedic and Trauma Surgery 1/2018

01-01-2018 | Handsurgery

The impact of different peripheral suture techniques on the biomechanical stability in flexor tendon repair

Authors: B. Wieskötter, M. Herbort, M. Langer, M. J. Raschke, D. Wähnert

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 1/2018

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Abstract

Purpose

Flexor tendon repair consists of circumferential peripheral sutures in combination with core sutures to avoid fraying and reduces the exposure of suture material on tendon surface. The peripheral suture adds up to a tenfold increase of the biomechanical stability compared to the core suture alone. The purpose of our study was to determine the most favourable peripheral repair technique for tendon repair.

Methods

Seventy-two porcine flexor tendons underwent standardized tenotomy and repair using one of the following six methods (n = 12): simple-running (SR), simple-locking (SL), Halsted-mattress (HM), lin-locking (LL), Lembert-mattress (LM), and Silfverskiöld cross-stich (SCS) suture technique. The SL- suture was placed 2 mm; the HM, LM, SC, and LL suture were placed 5 mm from the tendon gap. The SR suture was placed 1, 2, and 3 mm from tendon ends; no additional core suture was applied. For cyclic testing (1000 cycles), elongation was calculated; for load to failure construct stiffness, yield load and maximum load were determined.

Results

The mean cyclic elongation for all tested suture techniques was less than 2 mm; there was no significant difference between the groups regarding elongation as well as yield load. The HM, LM, SCS, and LL suture techniques presented significantly higher maximum loads compared to the SR- and SL-sutures. The 3 mm SR showed significantly higher maximum loads compared to the 2 and 1 mm SR.

Conclusions

Beside the distance from tendon gap, the type of linkage of the suture material across and beneath the epitendineum is important for biomechanical stability. Simple-running suture is easy to use, even with a slight increase of the distance from tendon gap significantly increases biomechanical strength. For future repairs of flexor tendon injuries, 3 mm stitch length is highly recommended for simple peripheral suture, while the Halsted-mattress suture unites the most important qualities: biomechanically strong, most part of suture material placed epitendinous, and not too complicated to perform.
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Metadata
Title
The impact of different peripheral suture techniques on the biomechanical stability in flexor tendon repair
Authors
B. Wieskötter
M. Herbort
M. Langer
M. J. Raschke
D. Wähnert
Publication date
01-01-2018
Publisher
Springer Berlin Heidelberg
Published in
Archives of Orthopaedic and Trauma Surgery / Issue 1/2018
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI
https://doi.org/10.1007/s00402-017-2836-2

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