Journal article
The Effect of Arch Drop on Tibial Rotation and Tibiofemoral Contact Stress in Postpartum Women
PM & R, Vol.10(11), pp.1137-1144
11/2018
DOI: 10.1016/j.pmrj.2018.04.006
PMID: 29705172
Abstract
Women are at greater risk for knee osteoarthritis and numerous other lower limb musculoskeletal disorders. Arch drop during pregnancy and the resultant excessive pronation of the feet may alter loading patterns and contribute to the greater prevalence of knee osteoarthritis in women.
To determine the effect of arch drop on tibial rotation and tibiofemoral contact stress.
Interventional study with internal control.
Biomechanics laboratory.
Eleven postpartum women (age 33.4 ± 5.3 years, body mass 76.1 ± 13.5 kg) who had lost arch height with pregnancy in a previous study.
Subjects underwent standing computed tomography (SCT) with their knees in a 20° fixed-flexed position with and without semirigid arch supports to reconstitute prepregnancy arch height. Magnetic resonance imaging of the knee was acquired at a flexion angle equivalent to that of SCT. Bone and cartilage were manually segmented on the magnetic resonance images and segmented surfaces were registered to the 3-dimensional SCT image sets for the arch-supported and -unsupported conditions. These models were used to measure changes in tibial rotation, as well as to estimate contact stress in the medial and lateral tibiofemoral compartments, using computational methods.
Change in tibial rotation and tibiofemoral contact stress with arch drop.
Arch drop resulted in a mean tibial internal rotation of 0.75 ± 1.33° (P = .02). Changes in mean or peak contact stress were not detected.
Arch drop causes internal tibial rotation, resulting in a shift in the tibiofemoral articulation. An associated increase in contact stress was not detected. Internal rotation of the tibia increases stress on the anterior cruciate ligament and menisci, potentially explaining the greater prevalence of knee disorders in postpartum women.
NA.
Details
- Title: Subtitle
- The Effect of Arch Drop on Tibial Rotation and Tibiofemoral Contact Stress in Postpartum Women
- Creators
- Kaitlin G Rabe - Department of Rehabilitation Medicine, University of Kansas Medical Center, Kansas City, KS(∗)Neil A Segal - Department of Rehabilitation Medicine, University of Kansas Medical Center, 3901 Rainbow Boulevard, MS 1046, Kansas City, KS 66160(†). Electronic address: segal-research@kumc.eduSaphia Waheed - Department of Orthopedics and Rehabilitation, The University of Iowa, Iowa City, IA(‡)Donald D Anderson - Department of Orthopedics and Rehabilitation, The University of Iowa, Iowa City, IA(§)
- Resource Type
- Journal article
- Publication Details
- PM & R, Vol.10(11), pp.1137-1144
- Publisher
- United States
- DOI
- 10.1016/j.pmrj.2018.04.006
- PMID
- 29705172
- ISSN
- 1934-1482
- eISSN
- 1934-1563
- Language
- English
- Date published
- 11/2018
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Epidemiology; Orthopedics and Rehabilitation; Industrial and Systems Engineering
- Record Identifier
- 9984040389202771
Metrics
14 Record Views