Abstract
Objective
Arthroscopic resection of the bony overhang of the acetabular rim with concurrent treatment of associated chondrolabral injury in order to improve femoroacetabular clearance, provide symptomatic relief and in theory, delay the onset or progression of osteoarthritis of the hip.
Indications
Clinical and radiographic evidence of femoroacetabular pincer or combined impingement, with minimal to moderate degenerative change in the hip joint.
Contraindications
Advanced osteoarthritis of the hip joint. Femoroacetabular pincer impingement arising from generalised overcoverage, e.g. coxa profunda. Acetabular retroversion in a dysplastic hip.
Surgical technique
Arthroscopy of the peripheral compartment, using a proximal anterolateral viewing portal and anterior and anterolateral working portals. Labral assessment, release from its capsular reflection, limited bony resection of the acetabular rim or labral ossification. Central compartment arthroscopy under traction, using the anterolateral and anterior portals alternately as viewing and working portals, and a distal anterolateral accessory portal. The labrum is detached to expose the bony overhang in the acetabular rim, which is resected with a burr. The labrum is refixed if it is of sufficient quality and debrided or resected otherwise.
Postoperative management
Labral resection: partial weight bearing, with pain-controlled progression to full weight bearing over 1–2 weeks. Labral refixation: Protected (20 kg) weight bearing for the first 4 weeks. Continuous passive motion therapy and the use of a stationary bicycle for 4 weeks, and early proprioceptive training are part of the rehabilitation regimen.
Results
Arthroscopic treatment of femoroacetabular impingement has been shown to provide symptomatic relief, improve hip outcome scores and is postulated to delay progression of osteoarthritis. Better clinical outcomes can be obtained with labral refixation if the labrum is of sufficient quality.
Zusammenfassung
Operationsziel
Arthroskopische Resektion des Pfannenrandüberhangs einschließlich der Behandlung des Folgeschadens am Knorpel-Labrum-Übergang, mit dem Ziel, die Gelenkmechanik zu normalisieren, Schmerzen zu reduzieren, und zumindest theoretisch eine sekundäre arthrotische Gelenkzerstörung aufzuhalten oder zu verzögern.
Indikation
Beschwerden und radiologischer Nachweis eines femoroazetabulären Pincer oder kombinierten Impingements, mit initialer oder moderater Gelenkschädigung.
Kontraindikationen
Fortgeschrittene Coxarthrose. Femoroazetabuläres Pincer-Impingement aufgrund einer global vermehrten Überdachung z. B. bei einer Coxa profunda. Azetabuläre Retroversion bei gleichzeitiger azetabulärer Restdysplasie.
Operationstechnik
Arthroskopie des peripheren Kompartiments über ein proximal ventrolaterales Portal zur Inspektion und ein ventrales und ventrolaterales Instrumentenportal. Beurteilung des Labrum acetabulare, Durchtrennung der kapsulolabralen Verbindung, Entfernung von möglichen Ossifikationen oder Kalzifikationen, partielle Pfannenrandtrimmung. Arthroskopie des zentralen Kompartiments unter Traktion über ein ventrolaterales und ventrales Portal als Inspektions- und Instrumentenportale sowie ein distal ventrolaterales Instrumentenportal. Vollständige Ablösung des Labrum, Darstellung und Resektion des überhängenden Pfannenrandanteils. Refixation eines qualitativ guten Labrum, anderenfalls Resektion.
Weiterbehandlung
Labrumresektion: Schmerzadaptierter Übergang zur Vollbelastung innerhalb von 1–2 Wochen. Labrumrefixation: Teilbelastung von 20 kg für die ersten 4 Wochen. Passive Motorschienenbehandlung für 4 Wochen, Standfahrrad und frühes Propriozeptionstraining.
Ergebnisse
Die arthroskopische Behandlung des femoroazetabulären Impingements führt zu einer signifikanten Schmerzreduktion, zur Steigerung von Ergebnisscores und möglicherweise zu einer Verzögerung einer arthrotischen Gelenkschädigung. Bessere klinische Resultate ergeben sich nach Refixationen eines qualitativ guten Labrum.
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S.-Y. Poh and R. Hube state that they have no conflict of interest. M. Dienst is consultant for Karl Storz.
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U. Bosch, Hannover
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R. Himmelhan, Mannheim
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Poh, SY., Hube, R. & Dienst, M. Arthroscopic treatment of femoroacetabular pincer impingement. Oper Orthop Traumatol 27, 536–552 (2015). https://doi.org/10.1007/s00064-015-0400-1
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DOI: https://doi.org/10.1007/s00064-015-0400-1