Low-Intensity Pulsed Ultrasound Accelerates Healing in Rat Calcaneus Tendon Injuries
dc.contributor.author | Jeremias Junior, Sergio Luiz | |
dc.contributor.author | Camanho, Gilberto Luis [UNIFESP] | |
dc.contributor.author | Bassit, Ana Cristina Ferreira | |
dc.contributor.author | Forgas, Andrea | |
dc.contributor.author | Ingham, Sheila Jean McNeill [UNIFESP] | |
dc.contributor.author | Abdalla, Rene Jorge [UNIFESP] | |
dc.contributor.institution | Universidade de São Paulo (USP) | |
dc.contributor.institution | Universidade Federal de São Paulo (UNIFESP) | |
dc.date.accessioned | 2016-01-24T14:16:56Z | |
dc.date.available | 2016-01-24T14:16:56Z | |
dc.date.issued | 2011-07-01 | |
dc.description.abstract | STUDY DESIGN: Controlled laboratory study.OBJECTIVE: To evaluate the effect of low-intensity therapeutic ultrasound on the murine calcaneus tendon healing process.BACKGROUND: Therapeutic ultrasound promotes formation and maturation of scar tissue.METHODS: Calcaneus tendon tenotomy and tenorrhaphy was performed on 28 Wistar rats. After the procedure, the animals were randomly divided into 2 groups. the animals in the experimental group received a 5-minute ultrasound application, once a day, at a frequency of 1 MHz, a spatial average temporal average intensity of 0.1 W/cm(2), and a spatial average intensity of 0.52 W/cm(2) at a 16-Hz frequency pulse mode (duty cycle, 20%). Data for the injured side were normalized in relation to the data from the contralateral healthy calcaneus tendon (relative values). the animals in the control group received sham treatment. After a 28-day treatment period, the animals were sacrificed and their tendons surgically removed and subjected to mechanical stress testing. the parameters analyzed were cross-sectional area (mm(2)), ultimate load (N), tensile strength (MPa), and energy absorption (mJ).RESULTS: A significant difference between groups was found for the relative values of ultimate load and tensile strength. the mean +/- SD ultimate load of the control group was -3.5% +/- 32.2% compared to 33.3% +/- 26.8% for the experimental group (P = .005). the mean tensile strength of the control group was -47.7% +/- 19.5% compared to -28.1% +/- 24.1% for the experimental group (P = .019). No significant difference was found in cross-sectional area and energy absorption.CONCLUSION: Low-intensity pulsed ultrasound produced by a conventional therapeutic ultrasound unit can positively influence the calcaneus tendon healing process in rats. J Ort hop Sports Phys Ther 2011;41(7):526-531, Epub 2 February 2011. doi:10.2519/jospt.2011.3468 | en |
dc.description.affiliation | Univ São Paulo, Sch Med, Dept Orthopaed Surg, São Paulo, Brazil | |
dc.description.affiliation | Fed Univ São Paulo UNIFESP EPM, Sch Med, Div Phys Med & Rehabil, Dept Orthopaed Surg, São Paulo, Brazil | |
dc.description.affiliation | Heart Hosp, São Paulo, Brazil | |
dc.description.affiliationUnifesp | Fed Univ São Paulo UNIFESP EPM, Sch Med, Div Phys Med & Rehabil, Dept Orthopaed Surg, São Paulo, Brazil | |
dc.description.source | Web of Science | |
dc.format.extent | 526-531 | |
dc.identifier | http://dx.doi.org/10.2519/jospt.2011.3468 | |
dc.identifier.citation | Journal of Orthopaedic & Sports Physical Therapy. Alexandria: J O S P T,, v. 41, n. 7, p. 526-531, 2011. | |
dc.identifier.doi | 10.2519/jospt.2011.3468 | |
dc.identifier.issn | 0190-6011 | |
dc.identifier.uri | http://repositorio.unifesp.br/handle/11600/33837 | |
dc.identifier.wos | WOS:000292172300009 | |
dc.language.iso | eng | |
dc.publisher | J O S P T, | |
dc.relation.ispartof | Journal of Orthopaedic & Sports Physical Therapy | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.subject | biomechanical testing | en |
dc.subject | physical agents | en |
dc.subject | therapeutic ultrasound | en |
dc.title | Low-Intensity Pulsed Ultrasound Accelerates Healing in Rat Calcaneus Tendon Injuries | en |
dc.type | info:eu-repo/semantics/article |