Evidence map›Paper›PMID 28366437›Full record

ArticleJournal of biomechanics2017

Mechanical, histological, and functional properties remain inferior in conservatively treated Achilles tendons in rodents: Long term evaluation.

Benjamin R Freedman, George W Fryhofer, Nabeel S Salka, Harina A Raja, Cody D Hillin, Courtney A Nuss, Daniel C Farber, Louis J Soslowsky

Abstract read
In one paragraph

Article in Journal of biomechanics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Nonsurgical treatment reduces tendon inflammation and elevates tendon markers in early healing.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2022
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Tendon Biomechanics and Crimp Properties Following Fatigue Loading Are Influenced by Tendon Type and Age in Mice.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2020
    Article
  12. Prostaglandin DPhysiological reports · 2019
    Article
  13. Article
  14. Biomaterials to Mimic and Heal Connective Tissues.Advanced materials (Deerfield Beach, Fla.) · 2019
    Review
  15. Effects of immobilization angle on tendon healing after achilles rupture in a rat model.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2019
    Article
  16. Article
  17. Models of tendon development and injury.BMC biomedical engineering · 2019
    Article
  18. Article
  19. Integrating soft and hard tissues via interface tissue engineering.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2018
    Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Benjamin R FreedmanMcKay Orthopedic Research Laboratory, Philadelphia, PA, United States.
George W FryhoferMcKay Orthopedic Research Laboratory, Philadelphia, PA, United States.
Nabeel S SalkaMcKay Orthopedic Research Laboratory, Philadelphia, PA, United States.
Harina A RajaMcKay Orthopedic Research Laboratory, Philadelphia, PA, United States.
Cody D HillinMcKay Orthopedic Research Laboratory, Philadelphia, PA, United States.
Courtney A NussMcKay Orthopedic Research Laboratory, Philadelphia, PA, United States.
Daniel C FarberMcKay Orthopedic Research Laboratory, Philadelphia, PA, United States.
Louis J SoslowskyMcKay Orthopedic Research Laboratory, Philadelphia, PA, United States. Electronic address: soslowsk@upenn.edu.

Funding

Overall: Resource-based Center for Musculoskeletal Disorders Research (Overall Application)P30AR069619 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI LOUIS J SOSLOWSKY · 2016 to 2026
$9.1M
The Role of Hyaluronic Acid Receptors in Tendon HealingP30AR050950 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI PIGNOLO, ROBERT JOHN · 2006 to 2015
$6.2M
Training Program in Musculoskeletal ResearchT32AR007132 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI Robert L Mauck, LOUIS J SOSLOWSKY · 1986 to 2026
$4.9M
Challenging Treatment Paradigms for Achilles Tendon Ruptures in an Animal ModelR01AR064216 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI SOSLOWSKY, LOUIS J · 2013 to 2017
$1.9M
Institutional Clinical and Translational Science AwardTL1TR000138 · NCATS · UNIVERSITY OF PENNSYLVANIA · PI FITZGERALD, GARRET A · 2012 to 2015
$877k
NCATS NIH HHS TL1 TR000138NIAMS NIH HHS P30 AR050950NIAMS NIH HHS P30 AR069619NIAMS NIH HHS R01 AR064216NIAMS NIH HHS T32 AR007132
6 · The paper itself

Abstract

Conservative treatment (non-operative) of Achilles tendon ruptures is suggested to produce equivalent capacity for return to function; however, long term results and the role of return to activity (RTA) for this treatment paradigm remain unclear. Therefore, the objective of this study was to evaluate the long term response of conservatively treated Achilles tendons in rodents with varied RTA. Sprague Dawley rats (n=32) received unilateral blunt transection of the Achilles tendon followed by randomization into groups that returned to activity after 1-week (RTA1) or 3-weeks (RTA3) of limb casting in plantarflexion, before being euthanized at 16-weeks post-injury. Uninjured age-matched control animals were used as a control group (n=10). Limb function, passive joint mechanics, tendon properties (mechanical, histological), and muscle properties (histological, immunohistochemical) were evaluated. Results showed that although hindlimb ground reaction forces and range of motion returned to baseline levels by 16-weeks post-injury regardless of RTA, ankle joint stiffness remained altered. RTA1 and RTA3 groups both exhibited no differences in fatigue properties; however, the secant modulus, hysteresis, and laxity were inferior compared to uninjured age-matched control tendons. Despite these changes, tendons 16-weeks post-injury achieved secant stiffness levels of uninjured tendons. RTA1 and RTA3 groups had no differences in histological properties, but had higher cell numbers compared to control tendons. No changes in gastrocnemius fiber size or type in the superficial or deep regions were detected, except for type 2x fiber fraction. Together, this work highlights RTA-dependent deficits in limb function and tissue-level properties in long-term Achilles tendon and muscle healing.

Indexed as

Achilles TendonAnimalsAnkle JointBiomechanical PhenomenaMaleMuscle, SkeletalRange of Motion, ArticularRats, Sprague-DawleyTendon InjuriesWound HealingCollagenExtracellular matrixFatigueFunctionMechanics

Identifiers

PMID28366437
PMCPMC5393933

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.