We Think Scapular Notching is a Problem Too.
|
|
Lateralized Humeral Components
- The three larger diameter glenospheres (38, 42 and 46mm) lateralize the humerus (without lateralizing the center of rotation) and increase joint stability.1,2
- Decreasing the humeral neck angle to 145 degrees further lateralizes the humerus (without lateralizing the center of rotation) and helps restore anatomic tensioning of the remaining intact rotator cuff.1,2 Additionally, placing the humeral tray on top of the resection eliminates the need to conically ream the proximal humerus, improves exposure and allows for larger glenospheres to be implanted (i.e., the size of the proximal humerus does not dictate the size of the glenosphere).
Greater Range of Motion
- The innovative glenoid baseplate design has a built-in offset which distally shifts the glenosphere to a position that prevents humeral liner impingement on the inferior glenoid. This offset negates the need for additional bone-consuming implantation techniques (i.e., inferiorly tilting the baseplate or pre-notching the bone).1,2
- The increased stability provided by the larger diameter glenospheres enable the humeral liners to be less constrained relative to other systems and thereby permits greater range of motion prior to impingement.1,2
- The extended glenosphere articular surface and chamfered sides maximize inferior overhang to minimize the potential for scapular notching and improve range of motion.
|
|
|
References
1. Roche C, Flurin PH, Wright T, Crosby L, Mauldin M, Zuckerman J. Geometric Analysis of the Grammont Reverse Shoulder Prosthesis: An Evaluation of the Relationship Between Prosthetic Design Parameters and Clinical Failure Modes. Proceedings of the 19th Annual Congress of the International Society for Technology in Arthroplasty; 2006 Oct 6-9; New York, NY.
2. Roche C, Flurin PH, Wright T, Crosby L, Mauldin M, Zuckerman J. An Evaluation of the Relationship between Reverse Shoulder Design Parameters and Range of Motion, Impingement and Stability. J Shoulder Elbow Surg. Forthcoming.
