Metasul Large Diameter Head (LDH) Technology with Durom Acetabular component
A proven solution with low wear and exceptional joint stability
Enhancing Stability and Increasing ROM
The Metasul® Metal-on-Metal LDH® Technology is the result of in-depth research, development, and clinical evaluation that began in 1988. Four decades of metal-on-metal experience have led to the development of the Metasul bearing, which has been shown to reduce wear 200 times over conventional polyethylene. Clinical results and extended analysis from retrievals up to 12 years postoperatively confirm the excellent performance of Metasul articulations.
Now combined with large diameter heads that increase range of motion and enhance stability, the Durom® Shell with Metasul LDH Large Diameter Head is a solution that offers the following benefits:
•Excellent initial fixation
•Reduced wear
•Joint restoration that replicates the natural anatomy
•Optimized range of motion
•Reduced opportunity for postoperative dislocation
Durom Acetabular Shell
The Durom acetabular shell is an anatomic, forged high-carbon CoCr monoblock acetabular shell that is 4mm thick. The shell has been used in international markets since 2001. The Durom acetabular shell is designed to optimize the metal-on-metal articulation within the acetabulum through both its material differences and shell geometry. Durom Shells have a CoCr articulating surface and a pure titanium plasma spray coating for enhanced surface roughness and scratch fit.
The Durom acetabular shell is designed with a shape closer to the true acetabulum and has a truncated hemisphere of 165°. (Fig. 2) This design allows more bone to be conserved during acetabular preparation. It also allows for excellent range of motion and a resultant increase in hip stability, potentially lowering the risk of impingement and dislocation. Because of the low profile geometry, the Durom shell will seat differently than a hemispherical shell. An additional feature of the Durom shell is the circumferential fins that protrude 0.5mm from the rim of the shell. These fins improve initial stability by providing 1mm of additional purchase at the periphery of the shell. It is essential that these fins engage in the cortical bone around the periphery of the acetabular rim, specifically in the anterior and posterior walls, in order to maximize initial cup stability.
The Metasul LDHcomponents can be combined with a wide range of Zimmer hip stem.
The Metasul articulation provides excellent resistance to wear. It has been implanted in more than 300,000 patients since 1988.
No other metal on- metal combination has achieved comparable long-term clinical results.
