Balgrist Socket: Unsealed ring of titanium blades fixed only around the circumference of the acetabulum. Polyethylene articulation insert. No longer manufactured.
ZW Stem: Zweymuller Stem
Copies; Bicon by Smith & Nephew, DiaLoc by Implantcast, C2 by Lima, Profemur by Wright
Manufacturer: Allo Pro, later Sulzer under the name Zweymuller.
See link to the right for a surgical technique for the Zweymuller stem.
Courtesy of Dr. Jan Hach
Czech Republic
CLICK HERE for a link to Dr. Hach's blog article about ARMD (Adverse Reaction to Metal Debris) from cement additives and titanium.