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In vivo three-dimensional kinematics of normal knees during different high-flexion activities
AIMS: In Asia and the Middle-East, people often flex their knees deeply in order to perform activities of daily living. The purpose of this study was to investigate the 3D kinematics of normal knees during high-flexion activities. Our hypothesis was that the femorotibial rotation, varus-valgus angle...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
British Editorial Society of Bone and Joint Surgery
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5842511/ https://www.ncbi.nlm.nih.gov/pubmed/29305450 http://dx.doi.org/10.1302/0301-620X.100B1.BJJ-2017-0553.R2 |
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author | Kono, K. Tomita, T. Futai, K. Yamazaki, T. Tanaka, S. Yoshikawa, H. Sugamoto, K. |
author_facet | Kono, K. Tomita, T. Futai, K. Yamazaki, T. Tanaka, S. Yoshikawa, H. Sugamoto, K. |
author_sort | Kono, K. |
collection | PubMed |
description | AIMS: In Asia and the Middle-East, people often flex their knees deeply in order to perform activities of daily living. The purpose of this study was to investigate the 3D kinematics of normal knees during high-flexion activities. Our hypothesis was that the femorotibial rotation, varus-valgus angle, translations, and kinematic pathway of normal knees during high-flexion activities, varied according to activity. MATERIALS AND METHODS: We investigated the in vivo kinematics of eight normal knees in four male volunteers (mean age 41.8 years; 37 to 53) using 2D and 3D registration technique, and modelled the knees with a computer aided design program. Each subject squatted, kneeled, and sat cross-legged. We evaluated the femoral rotation and varus-valgus angle relative to the tibia and anteroposterior translation of the medial and lateral side, using the transepicodylar axis as our femoral reference relative to the perpendicular projection on to the tibial plateau. This method evaluates the femur medially from what has elsewhere been described as the extension facet centre, and differs from the method classically applied. RESULTS: During squatting and kneeling, the knees displayed femoral external rotation. When sitting cross-legged, femurs displayed internal rotation from 10° to 100°. From 100°, femoral external rotation was observed. No significant difference in varus-valgus angle was seen between squatting and kneeling, whereas a varus position was observed from 140° when sitting cross-legged. The measure kinematic pathway using our methodology found during squatting a medial pivoting pattern from 0° to 40° and bicondylar rollback from 40° to 150°. During kneeling, a medial pivot pattern was evident. When sitting cross-legged, a lateral pivot pattern was seen from 0° to 100°, and a medial pivot pattern beyond 100°. CONCLUSION: The kinematics of normal knees during high flexion are variable according to activity. Nevertheless, our study was limited to a small number of male patients using a different technique to report the kinematics than previous publications. Accordingly, caution should be observed in generalizing our findings. Cite this article: Bone Joint J 2018;100-B:50–5. |
format | Online Article Text |
id | pubmed-5842511 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | British Editorial Society of Bone and Joint Surgery |
record_format | MEDLINE/PubMed |
spelling | pubmed-58425112018-03-09 In vivo three-dimensional kinematics of normal knees during different high-flexion activities Kono, K. Tomita, T. Futai, K. Yamazaki, T. Tanaka, S. Yoshikawa, H. Sugamoto, K. Bone Joint J Knee AIMS: In Asia and the Middle-East, people often flex their knees deeply in order to perform activities of daily living. The purpose of this study was to investigate the 3D kinematics of normal knees during high-flexion activities. Our hypothesis was that the femorotibial rotation, varus-valgus angle, translations, and kinematic pathway of normal knees during high-flexion activities, varied according to activity. MATERIALS AND METHODS: We investigated the in vivo kinematics of eight normal knees in four male volunteers (mean age 41.8 years; 37 to 53) using 2D and 3D registration technique, and modelled the knees with a computer aided design program. Each subject squatted, kneeled, and sat cross-legged. We evaluated the femoral rotation and varus-valgus angle relative to the tibia and anteroposterior translation of the medial and lateral side, using the transepicodylar axis as our femoral reference relative to the perpendicular projection on to the tibial plateau. This method evaluates the femur medially from what has elsewhere been described as the extension facet centre, and differs from the method classically applied. RESULTS: During squatting and kneeling, the knees displayed femoral external rotation. When sitting cross-legged, femurs displayed internal rotation from 10° to 100°. From 100°, femoral external rotation was observed. No significant difference in varus-valgus angle was seen between squatting and kneeling, whereas a varus position was observed from 140° when sitting cross-legged. The measure kinematic pathway using our methodology found during squatting a medial pivoting pattern from 0° to 40° and bicondylar rollback from 40° to 150°. During kneeling, a medial pivot pattern was evident. When sitting cross-legged, a lateral pivot pattern was seen from 0° to 100°, and a medial pivot pattern beyond 100°. CONCLUSION: The kinematics of normal knees during high flexion are variable according to activity. Nevertheless, our study was limited to a small number of male patients using a different technique to report the kinematics than previous publications. Accordingly, caution should be observed in generalizing our findings. Cite this article: Bone Joint J 2018;100-B:50–5. British Editorial Society of Bone and Joint Surgery 2018-01-01 /pmc/articles/PMC5842511/ /pubmed/29305450 http://dx.doi.org/10.1302/0301-620X.100B1.BJJ-2017-0553.R2 Text en ©2018 Tomita et al This is an open-access article distributed under the terms of the Creative Commons Attributions license (CC-BY-NC), which permits unrestricted use, distribution, and reproduction in any medium, but not for commercial gain, provided the original author and source are credited. |
spellingShingle | Knee Kono, K. Tomita, T. Futai, K. Yamazaki, T. Tanaka, S. Yoshikawa, H. Sugamoto, K. In vivo three-dimensional kinematics of normal knees during different high-flexion activities |
title | In vivo three-dimensional
kinematics of normal knees during different high-flexion activities |
title_full | In vivo three-dimensional
kinematics of normal knees during different high-flexion activities |
title_fullStr | In vivo three-dimensional
kinematics of normal knees during different high-flexion activities |
title_full_unstemmed | In vivo three-dimensional
kinematics of normal knees during different high-flexion activities |
title_short | In vivo three-dimensional
kinematics of normal knees during different high-flexion activities |
title_sort | in vivo three-dimensional
kinematics of normal knees during different high-flexion activities |
topic | Knee |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5842511/ https://www.ncbi.nlm.nih.gov/pubmed/29305450 http://dx.doi.org/10.1302/0301-620X.100B1.BJJ-2017-0553.R2 |
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