Gap Formation During Cyclic Testing of Flexor Tendon Repair

Linnanmäki, Lasse; Göransson, Harry; Havulinna, Jouni; Sippola, Petteri; Karjalainen, Teemu; Leppänen, Olli V.

doi:10.1016/j.jhsa.2017.12.005

Cited by 10 publications

(2 citation statements)

References 15 publications

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“…Forces exceeding yield load cause gapping of the repair, which often results in complete failure if the cyclic loading is continued. 9 Therefore, yield load may be a more important variable to be assessed than ultimate load. Our data show that irregularities in the placement of the suture cause half of the variation, and this may be decreased by standardizing the placement of suture.…”

Section: Discussionmentioning

confidence: 99%

Factors Accounting for Variation in the Biomechanical Properties of Flexor Tendon Repairs

Linnanmäki

Göransson

Havulinna³

et al. 2018

The Journal of Hand Surgery

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Purpose To investigate factors that cause variation in the mechanical properties of flexor tendon repairs.Methods One surgeon repaired 50 homogeneous absorbent sticks and 40 porcine flexor tendons with a simple loop, an Adelaide repair, a peripheral over-and-over repair, or a combination of the latter 2 repairs. Ten hand surgeons repaired 1 porcine flexor tendon with the combined Adelaide core and over-and-over peripheral repair. We loaded the samples statically until failure and calculated the variations caused by the testing process, tendon substance, and surgical performance in terms of yield and ultimate load.Results Tendon material and surgical performance both caused about half of the variation in the yield load of the combined repair. Surgical performance caused all variations observed in the ultimate load of the combined, peripheral-only, and core repairs. The effect of the tendon material was negligible in ultimate load. The intersurgeon variation was present only in yield load, and it represented one-tenth of the total variation. ConclusionsThe effect of tendon substance on variation of the ultimate load is minimal. In yield load, both tendon and surgical performance are responsible for the variation.Clinical relevance In clinical realm, variation caused by testing is not present, but intersurgeon variation may cause additional variation in yield load. A hand surgeon cannot change the variation due to tendon properties, but with a more meticulous surgical technique, the variation related to the surgical performance can probably be diminished.

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Section: Discussionmentioning

confidence: 99%

Factors Accounting for Variation in the Biomechanical Properties of Flexor Tendon Repairs

Linnanmäki

Göransson

Havulinna³

et al. 2018

The Journal of Hand Surgery

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“…The tendon was preconditioned with a ramp load from 0 N to 10 N at a rate of 200 mm/min. A cyclic loading protocol then was implemented, which consisted of sets of 500 cycles and corresponded to 5 to 10 days of active rehabilitation (Linnanma ¨ki et al, 2018). The amplitude of the cyclic loading was increased in 10 N increments for each set.…”

Section: Biomechanical Testingmentioning

confidence: 99%

A study to compare strengths of cadaveric tendon repairs with round-bodied and cutting needles

Vissers

Rusli

Scarborough

et al. 2021

J Hand Surg Eur Vol

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This human cadaver study investigated whether flexor tendon repairs performed with round-bodied needles had a higher risk of pull-out compared with those performed with cutting needles. Forty human cadaver tendons were repaired (20 with each type of needle), subjected to tensile traction testing and evaluated by failure load and mode of failure. The average failure load was 50 N (SD 13 N) for tendons repaired with round-bodied needles, compared with 49 N (SD 16 N) for tendons repaired with cutting needles. Round-bodied needles resulted in more suture pull-out (18 out of 20 tendons) than cutting needles (6 out of 20 tendons). We found no differences in failure load, but significant differences in the mode of failure between round-bodied and cutting needles when used for cadaveric flexor tendon repair.

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Effect of loading speed on gap resistance and tensile strength of flexor tendon repair under cyclic loading test

2023

Journal of Biomechanics

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Gap Formation During Cyclic Testing of Flexor Tendon Repair

Cited by 10 publications

References 15 publications

Factors Accounting for Variation in the Biomechanical Properties of Flexor Tendon Repairs

Factors Accounting for Variation in the Biomechanical Properties of Flexor Tendon Repairs

A study to compare strengths of cadaveric tendon repairs with round-bodied and cutting needles

Effect of loading speed on gap resistance and tensile strength of flexor tendon repair under cyclic loading test

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