Zusammenfassung
Chronische Schmerzen im vorderen Kniegelenkbereich sowie Instabilitäten des patellofemoralen Gelenks sind im klinischen Alltag häufig beobachtete Probleme. Morphologische Besonderheiten wie eine Dysplasie der Trochlea femoris oder Form- und Positionsabweichungen der Kniescheibe beeinträchtigen dabei die Funktion des patellofemoralen Gelenks als integralen Bestandteil des Kniegelenks.
Die Patella bildet in ihrer Funktion als Sesambein einerseits einen wichtigen Hebelarm für die Kraftübertragung der Quadrizepsmuskulatur bei der Streckung im Kniegelenk, andererseits muss das Gelenk zwischen Trochlea und Patella großen Druck- und Zugkräften widerstehen.
In dieser Arbeit versuchen wir sowohl einen Überblick über die knöcherne Anatomie des Patellofemoralgelenks zu geben als auch unter Berücksichtigung des Knorpelaufbaus die Eigenschaften des patellofemoralen Gleitlagers zu erläutern.
Schlüsselwörter
Patellofemorales Gelenk Anatomie FunktionBony and chondral anatomy of the patellofemoral joint
Abstract
Chronic anterior knee pain due to arthritic changes of the patellofemoral joint as well as instability of the patella are well-known problems for the clinician. Pathologic changes of the patellofemoral joint such as trochlear dysplasia or abnormality in form and position of the patella can cause severe impairment of knee joint function.
The patella as the largest sesamoid bone of our body serves as a biomechanical lever arm of the quadriceps muscle. However, the joint between the patella and its counterpart, the trochlea, also has to withstand large tension forces as well as compression forces as an integral part of the knee joint.
A good knowledge base of bony anatomy and chondral morphology — influencing patellar tracking during knee flexion as well as patellar stability — is necessary for successful treatment of patellofemoral problems.
Keywords
Patellofemoral joint Anatomy FunctionNotes
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