Fig. 1

Intraoperative situation after insertion of the printed template for arthroscopy. The endaural approach is marked with an * and the arthroscopic instruments are inserted via the pilot channel. The trocar for cannula or manipulations instruments is inserted via the posterolateral approach (#). The authors recommend a 0° angle for the optic. The central buckle is additional photopolymer/resin and improves the intraoperative handling