Minimized Torque on the Glenoid

• The larger diameter glenospheres result in a medialized center of rotation, thereby minimizing the torque on the glenoid. This medialized center of rotation has a long history of clinical success.¹
• The curved back of the glenoid baseplate further enhances fixation by converting destabilizing shear forces into stabilizing compressive forces.

Strong Initial Fixation

• Strong initial fixation can be achieved with the press-fit bone cage of the glenoid baseplate, while the six-hole baseplate design provides up to 30 degrees of screw variability to ensure optimal compression screw placement and purchase, even in poor quality bone.²
• Locking caps are provided to secure the compression screws to the glenoid baseplate at the desired variable angle.
• Bench testing conducted on the Equinoxe^® reverse quantified micromotion values at approximately half of those published with other systems measuring fixation using similar testing methodologies.^2,3,4,5

 Long-Term Biologic Fixation

• Unique to the Equinoxe, bone graft can be inserted into the cage to promote bone through-growth, which enhances the probability of long-term biologic fixation.

Equinoxe^® is a registered trademark of Exactech, Inc.

References

1. Boileau P, Watkinson DJ, Hatzidakis AM, Balg F. Grammont Reverse Prosthesis: Design, Rationale and Biomechanics. J Shoulder Elbow Surg. 2005 Jan-Feb;14(1 Suppl S):147S-161S.

2. Roche C, Flurin PH, Wright T, Crosby L, Zuckerman J. Effect of Varying Screw Configuration and Bone Density on Reverse Shoulder Glenoid Fixation following Cyclic Loading. Poster presented at the 54th Annual Orthopaedic Research Society Meeting; 2008 Mar 2-5; San Francisco, CA.

3. Harman M, Frankle M, Vasey M, Banks S. Initial Glenoid Component Fixation in Reverse Total Shoulder Arthroplasty: A Biomechanical Evaluation. J Shoulder Elbow Surg. 2005 Jan-Feb; 14(1 Suppl S):162S-167S.

4. Virani N, et al. Experimental and Finite Element Analysis of Baseplate Micromotion in the Reverse Shoulder Design. Trans. of 53rd Annual ORS Meeting, 2007.

5. Data on file at Exactech.