The modular stems are secured by a tapered connection. To ensure rotational stability, the stem has two opposing flanges, which are inserted into the medial and lateral grooves on the femoral/tibial components.

The current version V02 features 6 mm grooves for attachment of modular stems with female taper and 3 mm or 6 mm flanges. When attaching modular stems with 3 mm flanges, the stem must be aligned on the taper so that the threaded hole for the counter screw is not obscured.

(A). To this end, the alignment aid (15-6096/00) for modular stems is used.
(B). Modular stems with 6 mm wide flanges cannot be combined with Endo-Model® implants having only 3 mm grooves.