Advanced

Knee rotation in healthy individuals related to age and gender.

Almquist, Per Otto LU ; Ekdahl, Charlotte LU ; Isberg, Per-Erik and Fridén, Thomas (2012) In Journal of Orthopaedic Research
Abstract
An external device ("the Rottometer") was especially designed to measure passive knee rotation in vivo. The device had earlier been evaluated with respect to it's validity and reliability. In the present study, we evaluated knee rotation in knee-healthy individuals and studied possible age and gender related differences. Measurements of total internal-external rotation were made at 90°, 60°, and 30° of flexion using 6 and 9 N m torques, as well as the examiner's apprehension of end-feel as displacing forces. The study group constituted of 120 healthy subjects (60 females and 60 males) with no prior or present knee disorders. The sample was divided into four age groups (15-30, 31-45, 46-60, and >60 years). The results showed no... (More)
An external device ("the Rottometer") was especially designed to measure passive knee rotation in vivo. The device had earlier been evaluated with respect to it's validity and reliability. In the present study, we evaluated knee rotation in knee-healthy individuals and studied possible age and gender related differences. Measurements of total internal-external rotation were made at 90°, 60°, and 30° of flexion using 6 and 9 N m torques, as well as the examiner's apprehension of end-feel as displacing forces. The study group constituted of 120 healthy subjects (60 females and 60 males) with no prior or present knee disorders. The sample was divided into four age groups (15-30, 31-45, 46-60, and >60 years). The results showed no differences in knee rotation between the right and left knees or between the different flexion angles. The females showed 10-20% (p < 0.01) larger knee rotation than the males at all the three flexion angles and at all the three applied torques in all age-matched groups. In all age groups in both genders, the internal rotation accounted for 40-44% and the external for 56-60% of the total internal-external knee rotation. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Orthopaedic Research
publisher
John Wiley & Sons
external identifiers
  • wos:000311568700004
  • pmid:22778072
  • scopus:84870250030
ISSN
1554-527X
DOI
10.1002/jor.22184
language
English
LU publication?
yes
id
9fbe2e1d-e42f-4c9b-9a93-5fb6c53752b7 (old id 2967321)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/22778072?dopt=Abstract
date added to LUP
2012-08-09 18:01:14
date last changed
2017-09-10 04:44:53
@article{9fbe2e1d-e42f-4c9b-9a93-5fb6c53752b7,
  abstract     = {An external device ("the Rottometer") was especially designed to measure passive knee rotation in vivo. The device had earlier been evaluated with respect to it's validity and reliability. In the present study, we evaluated knee rotation in knee-healthy individuals and studied possible age and gender related differences. Measurements of total internal-external rotation were made at 90°, 60°, and 30° of flexion using 6 and 9 N m torques, as well as the examiner's apprehension of end-feel as displacing forces. The study group constituted of 120 healthy subjects (60 females and 60 males) with no prior or present knee disorders. The sample was divided into four age groups (15-30, 31-45, 46-60, and &gt;60 years). The results showed no differences in knee rotation between the right and left knees or between the different flexion angles. The females showed 10-20% (p &lt; 0.01) larger knee rotation than the males at all the three flexion angles and at all the three applied torques in all age-matched groups. In all age groups in both genders, the internal rotation accounted for 40-44% and the external for 56-60% of the total internal-external knee rotation. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res.},
  author       = {Almquist, Per Otto and Ekdahl, Charlotte and Isberg, Per-Erik and Fridén, Thomas},
  issn         = {1554-527X},
  language     = {eng},
  month        = {07},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Orthopaedic Research},
  title        = {Knee rotation in healthy individuals related to age and gender.},
  url          = {http://dx.doi.org/10.1002/jor.22184},
  year         = {2012},
}