Trabecular Metal™ Acetabular Augment and Restrictor
Addresses Bone Deficiencies
- The Augment and Restrictor fill bone deficiencies as an alternative to preparing and using structural allografts.
- Host bone is conserved while the implant size, position, and orientation are determined by the defect.
- Acetabular Cup position and patient kinematics remain uncompromised, as when using structural grafts.
- The Augment, shaped similar to a partial hemisphere, comes in three thicknesses and six sizes, allowing for fit in various defects.
- The Restrictor is concave and comes in three diameters, allowing for coverage of medial wall defects and containment of morsellized bone graft and bone cement.
Bone Ingrowth with Structural Support
- Fully interconnected trabecular structure with two to three times the porosity of other implant materials enables extensive tissue ingrowth and strong attachment.1
- Trabecular Metal material acts as a scaffolding for bone to grow into and remodel while providing load bearing structural support.
- High coefficient of friction against bone provides great initial stability.
- Low stiffness of Trabecular Metal material can produce more normal physiological loading and reduce stress shielding.2
- Augment fenestrations provide significant volume for morsellized bone graft, which may aid in bone growth and remodeling.3
Trabecular Metal material not only looks like bone, but it also acts like bone. Its high compressive strength and low modulus of elasticity are comparable to cancellous bone.1,4 These features are what make Trabecular Metal - The Best Thing Next to Bone™.
References
- Bobyn JD, Hacking SA, Chan SP, et al. Characterization of a new porous tantalum biomaterial for reconstructive orthopaedics. Scientific Exhibit, Proc of AAOS, Anaheim, CA. 1999.
- Pedersen DR, Brown TD, Poggie RA. Finite element analysis of periarticular stress of cemented, metal-backed, and porous tantalum-backed acetabular components. 45th Annual Orthopaedic Research Society Meeting, Anaheim, CA. 1999.
- Steinberg ME, Garino JP, editors. Revision total hip arthroplasty. Lippincott Williams and Wilkins; 1999; Philadelphia, PA.
- Krygier JJ, Bobyn JD, Poggie RA, et al. Mechanical characterization of a new porous tantalum biomaterial for orthopaedic reconstruction. Proc SIROT. Sydney, Australia, 1999.