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30 June 2016 : Clinical Research  

Operative Technique and Clinical Outcome in Endoscopic Core Decompression of Osteochondral Lesions of the Talus: A Pilot Study

Sascha BeckABCDEF, Tim ClaßenB, Marcel HaversathB, Marcus JägerA, Stefan LandgraeberAB

DOI: 10.12659/MSM.896522

Med Sci Monit 2016; 22:2278-2283

Abstract

BACKGROUND: Revitalizing the necrotic subchondral bone and preserving the intact cartilage layer by retrograde drilling is the preferred option for treatment of undetached osteochondral lesions of the talus (OLT). We assessed the effectiveness of Endoscopic Core Decompression (ECD) in treatment of OLT.

MATERIAL AND METHODS: Seven patients with an undetached OLT of the medial talar dome underwent surgical treatment using an arthroscopically-guided transtalar drill meatus for core decompression of the lesion. Under endoscopic visualization the OLT was completely debrided while preserving the cartilage layer covering the defect. The drill tunnel and debrided OLT were filled using an injectable bone graft substitute. Various clinical scores, radiographic imaging, and MRI were evaluated after a mean follow-up of 24.1 months.

RESULTS: The American Orthopedic Foot and Ankle Society Score significantly improved from 71.0±2.4 to 90.3±5.9, and the Foot and Ankle Disability Index improved from 71.8±11.1 to 91.7±4.8. Radiographically, we observed good bone remodelling of the medial talar dome contour within 3 months. In MRI, an alteration of the bony signal of the drill tunnel and the excised OLT remained for more than 12 months.

CONCLUSIONS: First follow-up results for the surgical technique described in this study are highly promising for treatment of undetached stable OLT grade II or transitional stage II-III according to the Pritsch classification. Even lesions larger than 150 mm2 showed good clinical scores, with full restoration of the medial talar dome contour in radiographic imaging.

Keywords: Ankle Joint - surgery, Adolescent, Arthroplasty - methods, Arthroscopy - methods, Cartilage, Articular - pathology, Decompression, Surgical - methods, Magnetic Resonance Imaging - methods, Osteonecrosis - surgery, Pilot Projects, Talus - surgery

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750