- 77 reverse Delta III shoulders

Neck-shaft angle had the largest effect on inferior scapular impingement, followed by glenosphere position [18]

Dempster WT had studied 12 patients with DELTA® III reverse shoulder replacements.

Specific variables in available reverse shoulder arthroplasty designs

ICD-9-CM: total shoulder replacement and reverse shoulder replacement.

Delta shoulder prosthesis for rotator cuff rupture.

"Reverse shoulder arthroplasty for the treatment of three-and four-part fractures of the proximal humerus in the elderly A PROSPECTIVE REVIEW OF 43 CASES WITH A SHORT-TERM FOLLOW-UP." Journal of Bone & Joint Surgery, British Volume 89.4 (2007): 516-520.
[12] Inman VT, Saunders JB, Abbott LC.

DELTA XTEND ™ Reverse Shoulder System - Synthes

"Simulated joint and muscle forces in reversed and anatomic shoulder prostheses." Journal of Bone & Joint Surgery, British Volume 90.6 (2008): 751-756.
[11] Bufquin, T., et al.


Complications in reverse shoulder arthroplasty

Reverse Total Shoulder Arthroplasty: A Review The reverse total shoulder arthroplasty prosthesis can nature of the reverse total shoulder arthroplasty.

Analysis of a retrieved delta III total shoulder prosthesis.

examined glenoid component stability with regard to the angle of implantation

The purpose of their study was to evaluate forces and micromotion in glenoid components attached to polyurethane blocks at 15°, 0°, and 15° of superior and inferior tilt

They suggested that implantation with an inferior tilt will reduce the incidence of mechanical failure of the glenoid component in a reverse shoulder prosthesis [17].

The DePuy Delta III reverse prosthesis, ..

It is different from the native anatomy of the shoulder and the conventional total .The Reverse Shoulder Replacement is a newly approved implant that has been is unable to raise her arm because the humeral prosthesis is dislocated .The reverse total shoulder Candidates for a reverse total shoulder arthroplasty is Reverse Total Shoulder Arthroplasty Components.

DELTA XTEND™ Reverse Shoulder System - DePuy …

Therefore, 3 DOF was created
The problem is that this reconstruction again provides 3 DOF less that anatomic mimic of shoulder
Finite element analysis of the reversed shoulder prosthesis is going to be don in order to find the amount of the micro motion at gelenohumeral joint
In order to find the micromotion; deformation, mesh displacement and failure of the parts at contact region is going to be assessed
According to the result a new part is going to be designed in order to solve the problem of RSP and elevate the degree of freedom
The stresses will be distributed
The pain will be reliefed considerably


Figure.4
Thanks for your attention
Conclusion
There are some dieases deal with reverese shoulder anatomy
These diseases reduce shoulder function performances
However, there are some complications that do not let RSP to act like human shoulder mimic anatomy
Theses complications can be improved by changing some factors, i.e COR, gelenoid head diameter, humerus neck shaft angle and etc.
Software simulation is novel approach to be used for DOF elevation
Outcomes the simulation endeavor are useful for new design procedure
[1] Bigliani LU, Craig EV, Butters KP.

reverse total shoulder portfolio offers optimal ..

However, by compensating with extra elevation, horizontal flexion and elbow, the patients were able to complete most of the ADL [15]

Reverse shoulder prosthesis parts has been provided and used for simulation
The parts have assembled in Ansys software in order to do the rigid body dynamics simulation
For each part, a specific material property was allocated
Between each two parts a specific joint was defined
At gelonohumeral joint between gelenoid head and gelenoid cup a spherical joint was defied.

Grammont’s reverse shoulder prosthesis for rotator cuff arthropathy.

"Biomechanical comparison of component position and hardware failure in the reverse shoulder prosthesis." Journal of Shoulder and Elbow Surgery 16.3 (2007): S9-S12.
[18] Gutiérrez, Sergio, et al.