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The cross-sectional shape of the fourfold semitendinosus tendon is oval, not round

BACKGROUND: The looped side of the semitendinosus tendon (ST) graft (i.e., the side inserted into the femoral tunnel during anterior cruciate ligament reconstruction) appears to be oval rather than round. The purpose of this study was to investigate the cross section of the fourfold semitendinosus t...

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Autores principales: Oshima, Takeshi, Nakase, Junsuke, Numata, Hitoaki, Takata, Yasushi, Tsuchiya, Hiroyuki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5061678/
https://www.ncbi.nlm.nih.gov/pubmed/27734283
http://dx.doi.org/10.1186/s40634-016-0063-3
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author Oshima, Takeshi
Nakase, Junsuke
Numata, Hitoaki
Takata, Yasushi
Tsuchiya, Hiroyuki
author_facet Oshima, Takeshi
Nakase, Junsuke
Numata, Hitoaki
Takata, Yasushi
Tsuchiya, Hiroyuki
author_sort Oshima, Takeshi
collection PubMed
description BACKGROUND: The looped side of the semitendinosus tendon (ST) graft (i.e., the side inserted into the femoral tunnel during anterior cruciate ligament reconstruction) appears to be oval rather than round. The purpose of this study was to investigate the cross section of the fourfold semitendinosus tendon graft and, more specifically, the differences in pressure exerted by a rounded rectangular tunnel versus a round femoral tunnel. METHODS: Seven STs were harvested from cadaveric knees and a fourfold ST graft was made. Aluminum cubes with round or rectangular tunnels containing four-way pressure-sensitive conductive sensors (vertically and bilaterally) were used. The area of both cubes was the same. The graft was inserted into the tunnels 15 mm from the looped edge. After measuring pressure, the graft was fixed using ultraviolet-curing acrylic resin and was cut at 7.5 mm and 15 mm from the lapel edge. The area, axes for the best fitting ellipse of the cross-section, and ellipticity of the axes were measured. RESULTS: In the round tunnel, the mean contact pressure was 287.0 ± 136.7 gf at the bilateral sensor; there was no contact pressure detected by the vertical sensor. In the rounded rectangular tunnel, the mean contact pressure was 260.9 ± 186.4 gf at the bilateral sensor and 352.9 ± 49.5 gf at the vertical sensor. Ellipticity was 1.25 ± 0.13 at 7.5 mm, and 1.17 ± 0.07 at 15 mm from the lapel edge of the graft. CONCLUSIONS: The cross-sectional shape of the fourfold ST graft was not round, but oval. Moreover, the rounded rectangular tunnel was more fitted to the graft than the round tunnel.
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spelling pubmed-50616782016-10-27 The cross-sectional shape of the fourfold semitendinosus tendon is oval, not round Oshima, Takeshi Nakase, Junsuke Numata, Hitoaki Takata, Yasushi Tsuchiya, Hiroyuki J Exp Orthop Research BACKGROUND: The looped side of the semitendinosus tendon (ST) graft (i.e., the side inserted into the femoral tunnel during anterior cruciate ligament reconstruction) appears to be oval rather than round. The purpose of this study was to investigate the cross section of the fourfold semitendinosus tendon graft and, more specifically, the differences in pressure exerted by a rounded rectangular tunnel versus a round femoral tunnel. METHODS: Seven STs were harvested from cadaveric knees and a fourfold ST graft was made. Aluminum cubes with round or rectangular tunnels containing four-way pressure-sensitive conductive sensors (vertically and bilaterally) were used. The area of both cubes was the same. The graft was inserted into the tunnels 15 mm from the looped edge. After measuring pressure, the graft was fixed using ultraviolet-curing acrylic resin and was cut at 7.5 mm and 15 mm from the lapel edge. The area, axes for the best fitting ellipse of the cross-section, and ellipticity of the axes were measured. RESULTS: In the round tunnel, the mean contact pressure was 287.0 ± 136.7 gf at the bilateral sensor; there was no contact pressure detected by the vertical sensor. In the rounded rectangular tunnel, the mean contact pressure was 260.9 ± 186.4 gf at the bilateral sensor and 352.9 ± 49.5 gf at the vertical sensor. Ellipticity was 1.25 ± 0.13 at 7.5 mm, and 1.17 ± 0.07 at 15 mm from the lapel edge of the graft. CONCLUSIONS: The cross-sectional shape of the fourfold ST graft was not round, but oval. Moreover, the rounded rectangular tunnel was more fitted to the graft than the round tunnel. Springer Berlin Heidelberg 2016-10-12 /pmc/articles/PMC5061678/ /pubmed/27734283 http://dx.doi.org/10.1186/s40634-016-0063-3 Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Research
Oshima, Takeshi
Nakase, Junsuke
Numata, Hitoaki
Takata, Yasushi
Tsuchiya, Hiroyuki
The cross-sectional shape of the fourfold semitendinosus tendon is oval, not round
title The cross-sectional shape of the fourfold semitendinosus tendon is oval, not round
title_full The cross-sectional shape of the fourfold semitendinosus tendon is oval, not round
title_fullStr The cross-sectional shape of the fourfold semitendinosus tendon is oval, not round
title_full_unstemmed The cross-sectional shape of the fourfold semitendinosus tendon is oval, not round
title_short The cross-sectional shape of the fourfold semitendinosus tendon is oval, not round
title_sort cross-sectional shape of the fourfold semitendinosus tendon is oval, not round
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5061678/
https://www.ncbi.nlm.nih.gov/pubmed/27734283
http://dx.doi.org/10.1186/s40634-016-0063-3
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