Cementless acetabular prosthesis

Long term survival of acetabular components is depending on established design considerations such as: inital stability, ingrowth surface, insert fixation and insert/shell congruency. The CIFacetabular components meet those criteria, thereby offering a solution to stable acetabular component fixation. The titanium hemispherical shell is available in 5-holed and solid (1 hole) version. Both areprovided with a 15° rim flare, oblique peripheral fins and tabs on the rim for rotational stability andadditional fixation, and coated in Biotan plasma-sprayed porous titanium coating, or optionallyHydroxiapatite coating. Option: subhemispherical outer shape of press-fit. The threaded apical hole allows the surgeon to check the apposition of the cup to the acetabularbone, either visual or by means of a probe. Insert congruency minimizes „cold flow“ and potential back side wear becouse of relative motion. Uniform polyethylene better distributes stresses over the cup inner surface. The Rim flare at outer geometry of the (sub)hemispherical shell, contributes significantly to the primary stability, yet allowing size-for-size reaming. The „Cliplock“ fixation mechanism securely locks the inserts and provides a maximum resistance to lever-out and push-out forces. Rim tabs increase rotational stability, thereby contributing to poly wear reduction as a result of micro motion.Oblique Rim fins will further secure the cup against the rotation, providing a firm hold in the anterior and posterior column of the superior acetabular rim, the os pubis nad os ischium.