In vitro studies of a new method of flexor tendon repair

Savage, R.

doi:10.1016/0266-7681(85)90001-4

Cited by 279 publications

(165 citation statements)

References 10 publications

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“…14 We are also aware that mechanical stress in the suture area promotes intrinsic healing of the tendon 15,16 and that more resistant sutures allow active and controlled movement. 17,18 However, we believe that the ideal control of this movement is based on the measurement of the force exerted by the affected motor system (flexor or extensor). The splint developed in this study makes it possible to promote active and controlled movement, by applying a force of a known and progressively greater magnitude.…”

Section: Discussionmentioning

confidence: 99%

Measurement of the Flexing Force of the Fingers by a Dynamic Splint With a Dynamometer

Silva

Mattar

Neto

et al. 2005

Clinics

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PURPOSE AND METHODS:In order to determine forces acting upon an articular joint during hand rehabilitation, a dynamic splint was built and connected to a dynamometer (capable of measuring forces in the range 0 -600 gf). Through trigonometric calculation, the authors measured the flexing force in the proximal interphalangeal joint of the middle finger at 30°, 45°, 60°, and 90° of flexion. Measurements were obtained in a population of 40 voluntary adults, 20 females and 20 males, This flexing force was correlated with age, sex, and anthropometric measures. RESULTS: Force in the flexing tendon is maximal at the start of flexion, and decreases as the angle of joint flexion increases. A relationship was observed between finger length and the magnitude of the force exerted on the tendon: the longer the finger, the greater the force exherted upon the tendon. Force is greater at all the measured angles, (except 30°) in males and in individuals of higher stature, and bigger arm span. CONCLUSIONS: The flexing force can be effectively measured at all flexing angles, that it correlates with a number of different anthropometric parameters, and that such data are likely to open the way for future studies.

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Section: Discussionmentioning

confidence: 99%

Measurement of the Flexing Force of the Fingers by a Dynamic Splint With a Dynamometer

Silva

Mattar

Neto

et al. 2005

Clinics

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“…In these cases forces and gapping are measured beyond 2 mm to gain biomechanical data to compare the investigated repair methods. 8,22,28,[35][36][37][38][39][40][41] From this investigation it becomes apparent that in laboratory test setups that stress repairs beyond initial gapping the chosen tendon model influences data. Therefore results regarding measured forces and gaps beyond initial gapping might not be as comparable between species as previously thought.…”

Section: Resultsmentioning

confidence: 95%

Animal Models for Tendon Repair Experiments: A Comparison of Pig, Sheep and Human Deep Flexor Tendons in Zone II

Peltz

Hoffman

Scougall

et al. 2017

J Hand Surg Asian-Pac Vol

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Background: This laboratory study compared pig, sheep and human deep flexor tendons in regards to their biomechanical comparability. Methods: To investigate the relevant biomechanical properties for tendon repair experiments, the tendons resistance to cheese-wiring (suture drag/splitting) was assessed. Cheese-wiring of a suture through a tendon is an essential factor for repair gapping and failure in a tendon repair. Results: Biomechanical testing showed that forces required to pulling a uniform suture loop through sheep or pig tendons in Zone II were higher than in human tendons. At time point zero of testing these differences did not reach statistical significance, but differences became more pronounced when forces were measured beyond initial cheese-wiring (2 mm, 5 mm and 10 mm). The stronger resistance to cheese-wiring was more pronounced in the pig tendons. Also regarding size and histology, sheep tendons were more comparable to human tendons than pig tendons. Conclusions: Differences in tendon bio-properties should be kept in mind when comparing and interpreting the results of laboratory tendon experiments.

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“…To safely commence an early active mobilization protocol, it is necessary for the suture to withstand enough strength. This threshold is somewhere around 74 N, 13 which means that both the CW (132 N) and PW (72 N) meet this criterion. Forces that approach the limit of suture strength may lead to gapping and ultimately lead to a weaker repair and adhesion formation.…”

Section: Discussionmentioning

confidence: 99%

Biomechanical and Dimensional Measurements of the Pulvertaft Weave Versus the Cow-Hitch Technique

Vincken

Lauwers

Hulst

2016

Hand (New York, N,Y.)

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Background: In this study, biomechanical strength and bulkiness of the cow-hitch technique and Pulvertaft weave were compared. Our goal was to investigate whether the cow hitch can withstand equal strength in comparison with the Pulvertaft and to see if there is a difference in bulk, which could enhance gliding function and reduce friction and adhesion formation. Methods: Sheep tendons were used to perform 10 cow-hitch and 10 Pulvertaft repairs. Tensile strength was obtained with a cyclic loading tensile testing machine and tendon width and height measurements were obtained through digital analysis by photographs of the repairs. Results: The cow hitch showed significantly better ultimate strength and had less bulk. There was no statistical difference in displacement, defined as gain in total length of the tendon. Conclusions:The results in this study show that the cow hitch outperforms the Pulvertaft weave in both ultimate strength and bulk.

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In vitro studies of a new method of flexor tendon repair

Cited by 279 publications

References 10 publications

Measurement of the Flexing Force of the Fingers by a Dynamic Splint With a Dynamometer

Measurement of the Flexing Force of the Fingers by a Dynamic Splint With a Dynamometer

Animal Models for Tendon Repair Experiments: A Comparison of Pig, Sheep and Human Deep Flexor Tendons in Zone II

Biomechanical and Dimensional Measurements of the Pulvertaft Weave Versus the Cow-Hitch Technique

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