| Does total knee arthroplasty change frontal plane knee biomechanics during gait? | |
MedLine Citation:
|
PMID: 22125248 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
BACKGROUND: Dynamic knee varus angle and adduction moments have been reported to be reduced after TKA. However, it is unclear whether this reduction is maintained long term. QUESTIONS/PURPOSES: We therefore asked whether (1) the dynamic knee adduction angle and moment remain reduced 1 year after TKA, (2) if changes in adduction moment are related to static alignment and varus angle during gait 6 months and 1 year after TKA, and (3) if these changes in loading pattern are related to changes in Knee Society scores. METHODS: We performed gait analysis on 15 patients (17 TKAs) before surgery and 6 months and 1 year after TKA. Weightbearing radiographs were used to assess coronal plane knee alignment. RESULTS: TKA corrected static knee alignment from 2.2° (2.5°) varus to 3.5° (2.7°) valgus at 6 months. Peak varus angle during gait was reduced from 9.7° (6.5°) to 3.6° (5.8°) at 6 months and 5.2° (7.6°) at 1 year. Peak adduction moment was reduced to 85% of the preoperative level at 6 months but increased to 94% of the preoperative level at 1 year. We observed a correlation between the increase in dynamic varus angle and increase in adduction moment from the 6-month to 1-year followups. CONCLUSIONS: TKA improves knee adduction moment at 6 months, but this effect is lost with time (1 year). CLINICAL RELEVANCE: Despite restoration of static knee alignment, knee adduction moment remains high presumably predisposing to medial polyethylene wear as noted by retrieval studies. |
Authors:
|
Karl F Orishimo; Ian J Kremenic; Ajit J Deshmukh; Stephen J Nicholas; Jose A Rodriguez |
Related Documents
:
|
9353428 - Radiation therapy for early glottic carcinoma (t1n0m0). the adverse effect of treatment... 10844868 - Magnetic resonance spectroscopy in the evaluation of neurotoxicity following cranial ir... 18509718 - Arterial catheterization and embolization for management of emergent or anticipated mas... 16680558 - Update on intracerebral haemorrhage. 18583908 - Long-term follow-up of patients with relatively high effective defibrillation threshold... 22811118 - 129 ruptured basilar apex aneurysms: current outcomes at a tertiary high volume center. |
Publication Detail:
|
Type: Journal Article Date: 2011-11-29 |
Journal Detail:
|
Title: Clinical orthopaedics and related research Volume: 470 ISSN: 1528-1132 ISO Abbreviation: Clin. Orthop. Relat. Res. Publication Date: 2012 Apr |
Date Detail:
|
Created Date: 2012-03-06 Completed Date: 2012-05-16 Revised Date: 2013-06-27 |
Medline Journal Info:
|
Nlm Unique ID: 0075674 Medline TA: Clin Orthop Relat Res Country: United States |
Other Details:
|
Languages: eng Pagination: 1171-6 Citation Subset: AIM; IM |
Affiliation:
|
Nicholas Institute of Sports Medicine and Athletic Trauma, Lenox Hill Hospital, 100 E 77th Street, 2nd Floor, New York, NY 10075, USA. karl@nismat.org |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Aged Arthroplasty, Replacement, Knee* Biomechanics / physiology* Female Gait / physiology* Humans Knee / physiology*, surgery Knee Joint / physiology*, surgery Male Middle Aged Osteoarthritis, Knee / physiopathology, surgery* Range of Motion, Articular / physiology |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Femoral stress fractures associated with long-term bisphosphonate treatment.
Next Document: Online professional networks for physicians: risk management.