Journal article
Insertional achilles tendinopathy associated with altered transverse compressive and axial tensile strain during ankle dorsiflexion
Journal of orthopaedic research, Vol.35(4), pp.910-915
04/2017
DOI: 10.1002/jor.23338
PMCID: PMC5738911
PMID: 27306527
Abstract
The purposes of this case-control study (N = 20) were to examine the effects of insertional Achilles tendinopathy (IAT) and tendon region on tendon strain in patients with IAT compared to a control group without tendinopathy. An ultrasound transducer was positioned over the Achilles tendon insertion during dorsiflexion tasks, which included standing and partial squat. A non-rigid image registration-based algorithm was used to estimate transverse compressive and axial tensile strains of the tendon from radiofrequency ultrasound images, which was segmented into two regions (superficial tendon and deep). For transverse compressive strain, two-way mixed effects ANOVAs demonstrated that there were interaction effects between group and tendon region for both dorsiflexion tasks (Heel lowering, p = 0.004; Partial squat, p = 0.008). For axial tensile strain, the IAT group demonstrated a main effect of lower tensile strain than the control group (Standing, p = 0.001; Partial squat, p = 0.033). There was also a main effect of greater tensile strain in the superficial region of the tendon compared to the deep during standing (p = 0.002), but not during partial squat (p = 0.603). Reduced transverse compressive and axial tensile strains in the IAT group indicate altered mechanical properties specific to the region of IAT pathology. Additionally, patterns of compressive strain are consistent with the theory of calcaneal impingement contributing to IAT pathology. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:910-915, 2017.
Details
- Title: Subtitle
- Insertional achilles tendinopathy associated with altered transverse compressive and axial tensile strain during ankle dorsiflexion
- Creators
- Ruth L Chimenti - Department of Physical Therapy and Rehabilitation Science, University of Iowa, 2116 Westlawn, Iowa City, 52245, IowaMary Bucklin - Department of Biomedical Engineering, University of Rochester, Rochester, New YorkMeghan Kelly - Department of Orthopaedic Surgery, University of Rochester, Rochester, New YorkJohn Ketz - Department of Orthopaedic Surgery, University of Rochester, Rochester, New YorkAdolph Samuel Flemister - Department of Orthopaedic Surgery, University of Rochester, Rochester, New YorkMichael S Richards - Department of Surgery, University of Rochester, Rochester, New YorkMark R Buckley - Department of Biomedical Engineering, University of Rochester, Rochester, New York
- Resource Type
- Journal article
- Publication Details
- Journal of orthopaedic research, Vol.35(4), pp.910-915
- DOI
- 10.1002/jor.23338
- PMID
- 27306527
- PMCID
- PMC5738911
- ISSN
- 0736-0266
- eISSN
- 1554-527X
- Grant note
- P30 AR061307 / NIAMS NIH HHS
- Language
- English
- Date published
- 04/2017
- Academic Unit
- Physical Therapy and Rehabilitation Science
- Record Identifier
- 9984083270702771
Metrics
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