R3^◊ Acetabular System utilizes STIKTITE^◊ - a revolutionary proprietary porous shell coating engineered to create additional shell stability while offering an architecture that encourages bony in-growth.

The 60% porosity of STIKTITE^◊ creates a balance between long-term in-growth and intraoperative scratch-fit, reassuring positive feedback to the surgeon during impaction.

Utilizing STIKTITE^◊ coating on the R3^◊ Acetabular Shells allows for a true scratch-fit feel during the shell seating and a clinically proven ingrowth surface for long-term implant success.¹

STIKTITE^◊ Porous Coating demonstrated a higher coefficient of friction compared to trabecular metal when tested by the same method.² The mean coefficient of friction for STIKTITE^◊ coating was higher than that of trabecular metal against both cancellous and cortical bone. These results indicate that STIKTITE^◊ coating should have superior friction, scratch-fit feel and initial fixation stability as compared to trabecular metal.

Frictional coefficients of bone ingrowth structures against cancellous and cortical bone (n=96 to 100)³

STIKTITE^◊ coating is a sintered three-dimensional asymmetric titanium powder that has a porosity of about 60%. Increased porosity allows for potentially greater bone ingrowth, which can enhance long-term fixation and implant stability. STIKTITE^◊ coating provides enhanced initial mechanical stability, which is particularly important in damaged or less biologically active bone. The average pore size of STIKTITE^◊ coating (200 μm) is within the 100– to 500–μm range for optimal bone ingrowth.

References

1 Bourne R. Randomized controlled trial to compare acetabular component fixation of two porous ingrowth surfaces using RSA analysis. London, Ontario, Canada: London Health Science Center. 2007. Internal report on file at Smith & Nephew, Memphis, TN.

2 Barrack RL. Dislocation after total hip arthroplasty: implant design and orientation. J Am Acad Orthop Surg. 2003 Mar-Apr;11(2):89–99.

3 Heiner AD, Brown TD. Frictional coefficients of a new bone ingrowth structure. Poster no. 1623 presented at: Orthopaedic Research Society Annual Meeting; Feb 11–14, 2007; San Diego, CA.