26dkou126 10.3205/26dkou126 urn:nbn:de:0183-26dkou1268 Meeting Abstract Landenberger Landenberger Jakob J

Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland

author Arras Arras Christian C

Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland

author Korthaus Korthaus Alexander A

Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland

author Fahlbusch Fahlbusch Hendrik H

Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland

author Akoto Akoto Ralph R

BG Klinikum Hamburg, Hamburg, Deutschland

author Berninger Berninger Markus M

Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland

author Krause Krause Matthias M

Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland

author Frosch Frosch Karl-Heinz KH

Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland BG Klinikum Hamburg, Hamburg, Deutschland

author German Medical Science GMS Publishing House

Düsseldorf

610 20261020 engl This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung). M0659 126 Deutsche Gesellschaft für Orthopädie und Unfallchirurgie Deutsche Gesellschaft für Orthopädie und Orthopädische Chirurgie Deutsche Gesellschaft für Unfallchirurgie Berufsverband für Orthopädie und Unfallchirurgie Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2026) Abstracts | PCC und komplexe Bandinstabilität Berlin 20261020 20261023 DKOU26_Abs_2435 TextObjectives and questions: The posterolateral corner (PLC) of the knee is a key stabilizer of varus, rotational, and posterior knee stability. Open anatomic reconstruction is an established treatment for high-grade PLC injuries, whereas clinical data on the all-arthroscopic anatomic reconstruction remain limited. The purpose of this prospective study was to compare clinical, functional, and radiological outcomes after all-arthroscopic versus open anatomic PLC reconstruction at a minimum of 36 months follow up.Material and methods: This prospective cohort study included patients with chronic (>6 weeks) combined PLC and posterior cruciate ligament (PCL) injuries classified as Fanelli type B/PoLIS LI-B treated between January 2019 and December 2021. Patients were block-randomized to arthroscopic anatomic PLC reconstruction or open reconstruction. Standardized clinical follow-up was performed at a minimum of 36 months. Primary outcomes included Lysholm and subjective International Knee Documentation Committee (IKDC) scores and objective posterior stability assessed by posterior drawer and stress radiography (side-to-side difference). Continuous variables are reported as median and interquartile range (IQR). Statistical analysis used Welch’s t-tests or Mann–Whitney U tests (p<0.05). Continuous variables are reported as median and interquartile range (IQR).Results: Twenty-four patients (arthroscopic n=13, open n=11) were evaluated at a median follow-up of 49.9 months. Arthroscopic reconstruction required shorter operative time (134 [120–144] vs. 170 [142.5–194.5] minutes; p=0.024). At 36 months, functional outcomes were comparable between groups, with similar Lysholm scores (93.0 [81.0–94.0] vs. 94.0 [83.5–94.5]; p>0.05) and IKDC scores (80.5 [63.2–90.8] vs. 80.5 [71.9–91.4]; p>0.05). Posterior stability was equally restored, with comparable posterior drawer side-to-side differences (2.0 [1.7–2.7] vs. 1.0 [0.5–2.5] mm) and stress radiography values (2.7 [1.3–3.4] vs. 3.3 [2.0–5.2] mm; all p>0.05). No perioperative complications occurred.Discussion and conclusions: Both all-arthroscopic and open anatomic PLC reconstruction provide durable restoration of knee stability with comparable clinical and functional outcomes at 36-month follow-up in chronic Fanelli B injuries. When performed by experienced surgeons, the all-arthroscopic technique represents a safe minimally invasive alternative and is associated with shorter operative time. 0 0 0 0