Document Detail


Three-dimensional patellar motion at the natural knee during passive flexion/extension. An in vitro study.
MedLine Citation:
PMID:  19444875     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Patellar maltracking may result in many patellofemoral joint (PFJ) disorders in the natural and replaced knee. The literature providing quantitative reference for normal PFJ kinematics according to which patellar maltracking could be identified is still limited. The aim of this study was to measure in vitro accurately all six-degrees-of-freedom of patellar motion with respect to the femur and tibia on 20 normal specimens. A state-of-the-art knee navigation system, suitably adapted for this study aim, was used. Anatomical reference frames were defined for the femur, tibia, and patella according to international recommendations. PFJ flexion, tilt, rotation, and translations were calculated in addition to standard tibiofemoral joint (TFJ) kinematics. All motion patterns were found to be generally repeatable intra-/interspecimens. PFJ flexion was 62% of the corresponding TFJ flexion range; tilt and translations along femoral mediolateral and tibial proximodistal axes during TFJ flexion were found with medial, lateral, and distal trends and within 12 degrees , 6 and 9 mm, respectively. No clear pattern for PFJ rotation was observed. These results concur with comparable reports from the literature and contribute to the controversial knowledge on normal PFJ kinematics. Their consistence provides fundamental information to understand orthopedic treatment of the knee and for possible relevant measurements intraoperatively.
Authors:
Claudio Belvedere; Alberto Leardini; Andrea Ensini; Luca Bianchi; Fabio Catani; Sandro Giannini
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of orthopaedic research : official publication of the Orthopaedic Research Society     Volume:  27     ISSN:  1554-527X     ISO Abbreviation:  J. Orthop. Res.     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-10-21     Completed Date:  2009-11-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8404726     Medline TA:  J Orthop Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1426-31     Citation Subset:  IM    
Copyright Information:
(c) 2009 Orthopaedic Research Society. Published by Wiley Periodicals, Inc.
Affiliation:
Movement Analysis Laboratory, Istituto Ortopedico Rizzoli, Centro di Ricerca Codivilla-Putti, Via di Barbiano 1/10, 40136 Bologna, Italy. belvedere@ior.it
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Aged, 80 and over
Biomechanics*
Cadaver
Female
Femur / physiology
Humans
Knee Joint / physiology*
Male
Middle Aged
Patella / physiology
Tibia / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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