NDLI: Dynamic three-dimensional in vivo tracking of the abnormal extensor mechanism

Content Provider	IEEE Xplore Digital Library
Author	Christakis, P.M. Popich, L.S. Cook, S.D. Brunet, M.E.
Copyright Year	1995
Description	Author affiliation: Dept. of Orthopaedic Surg., Tulane Univ. Med. Center, New Orleans, LA, USA (Christakis, P.M.; Popich, L.S.; Cook, S.D.; Brunet, M.E.)
Abstract	This study addresses the effects of extensor mechanism realignment (EMR) on patellar tracking patterns in pathologic knees. Ten patients diagnosed with patellar maltracking, subluxation, or patellofemoral malalignment and requiring an EMR participated in the study. Lateral release and vastus medialis obliquus (VMO) advancement were performed unilaterally in all ten patients. Tibial tubercle transfer was conducted in five of these patients. Electromagnetic sensors were used to dynamically measure patellar and tibial motion relative to the femur in three dimensions. Patella flexion, rotation, tilt, and shift were measured as the knee was passively flexed from full extension to 90/spl deg/ knee flexion. Lateral release had little effect on patellar spin and flexion patterns, although it did increase net medial shift in seven of ten cases. Following VMO advancement the rate of patellar flexion and net medial patellar spin increased in seven cases. Net lateral patellar tilt increased in seven cases and medial shift increased in five cases. Due to a limited amount of data, conclusive observations could not be made regarding tibial tubercle transfer.
Starting Page	101
Ending Page	103
File Size	279268
Page Count	3
File Format	PDF
ISBN	0780320832
DOI	10.1109/SBEC.1995.514448
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-04-07
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	In vivo Knee Electromagnetic radiation Motion measurement Electromagnetic measurements Orthopedic surgery Tendons Transmitters Leg Medical diagnostic imaging
Content Type	Text
Resource Type	Article

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