Factors of patellar instability: An anatomic radiographic study View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1994-03

AUTHORS

H. Dejour, G. Walch, L. Nove-Josserand, Ch. Guier

ABSTRACT

We analyzed the radiographs and computed tomography (CT) scans of 143 knees operated on for symptomatic patellar instability and 67 contralateral asymptomatic knees, togcther with 190 control knee radiographs and 27 control knee scans, to determine the factors affecting patellar instability. Four factors were relevant in knees with symptomatic patellar instability: (1)Trochlear dysplasia (85%), as defined by the crossing sign (96%) and quantitatively experessed by the trochlear bump, pathological above 3 mm or more (66%), and the trochlear depth, pathologic at 4 mm or less. (2)Quadriceps dysplasia (83%), defined as present when the patellar tilt in extension is more than 20% on the CT scans. (3)Patella alta (Caton-Deschamps) index greater than or equal to 1.2 (24%). (4)Tibial tuberosity-trochlear groove, pathological when greater than or equal to 20 mm (56%). The factors appeared in only 3%–6.5% of the control knees. The etiology of patellar instability is multifactorial. Determination of the factors permits an effective elective therapeutic plan which aims at correcting the anomalies present. More... »

PAGES

19-26

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01552649

DOI

http://dx.doi.org/10.1007/bf01552649

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1015476330

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/7584171


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