Trabecular Metal™ Acetabular Revision System:
Augments and Cages
Trabecular Metal Augments
- Made entirely of Trabecular Metal Material—no substrate
- Interfaces are cemented, creating a monolithic construct without concerns of micromotion
- Shell and Augment combination increases total implant surface area for optimised Trabecular Metal Material-to-host-bone Contact
- Augments sized from 50 to 70mm in 10, 15, 20, and 30mm thicknesses
- Wide array of Augment sizing allows selection to fit the size of the defect, thereby minimising bone removal
Trabecular Metal Buttress Augments
- Made entirely of Trabecular Metal Material—no substrate
- Addresses extensive superior segmental defects (Paprosky Type IIIA)
- Alternative to allograft, without potential for bone resorption or disease transmission
- Designed to provide a technically simpler procedure, compared to using structural allograft
- Interfaces are cemented, creating a monolithic construct without concerns of micromotion
- Host bone is conserved while implant size, position, and orientation are determined by the defect
- Allows head center to be restored for optimisation of patient kinematics
- Available in straight superior and posterior/anterior column configurations
- Sizing allows use with Trabecular Metal Revision Shells of any size
Trabecular Metal Restrictors
- Made entirely of Trabecular Metal Material—no substrate
- Used to rebuild medial wall
Trabecular Metal Shim Augments
- Made entirely of Trabecular Metal Material—no substrate
- Placed between Buttress Augment flange and host bone to optimise the fit of the buttress device against the iliac bone
- Interfaces are cemented, creating a monolithic construct without concerns of micromotion
Trabecular Metal Cup-Cage Construct
- Cage manufactured of commercially pure titanium for optimised mechanical strength
- Left and right configurations
- Long-flange and short-flange options
- Inferior flange designed to be spiked into ischium
- Shaped to fit individual patient anatomy
- Used where Trabecular Metal Revision Shell alone does not provide adequate stability
- Cage spans acetabular defects and pelvic discontinuities to provide mechanical stability of the Cup-Cage construct until biological ingrowth occurs within the Trabecular Metal Revision Shell
- Cementing the Longevity Highly Crosslinked Polyethylene Liners, Cages, and Trabecular Metal Revision Shells together creates a single construct, without concerns of micromotion
The cup-cage reconstruction is the final piece in the puzzle for difficult acetabular revisions. By combining a Trabecular Metal Shell protected by flanges that extend from the ilium to the ischium, we can provide an excellent environment for bone graft remodeling via the Trabecular Metal material. Preliminary results with this cup-cage reconstruction have been extremely encouraging. - Allan E. Gross, MD, FRCSC, O.Ont.
