Delta shoulder prosthesis for rotator cuff rupture.

humerus in elderly patients with the Delta III reverse shoulder prosthesis

Analysis of a retrieved Delta III total shoulder prosthesis

The Delta Xtend Reverse Shoulder System (De Puy, J&J Company) is the latest implant in the Delta reverse series, which started from the design of Dr Paul Grammont, the Delta I, in 1985. It consists of a cementless titanium modular hydroxyapatite (HA)-coated or monobloc cobalt–chromium alloy (Co–Cr) cemented stem, variable thickness polyethylene (PE) cup and a glenoid component with a central peg and cannulated screws. The features of this design on the humeral prosthesis are a non-anatomic neck shaft angle, which was presented on the previous model, a fluted humeral stem and thinner monobloc humeral stem for cemented purposes. The metaglene has a curved back design for preserving bone, and the joint COR is on the glenoid surface for reducing pull-out torques. There is also an inferior overlap of the glenoid component in order to avoid scapular neck erosion and maximise the range of motion (ROM).

Prosthetic component relationship of the reverse Delta III total shoulder prosthesis in the transverse plane of the body.

The reverse shoulder prosthesis (Delta III) in ..

Eastern Time, surgeons and others are invited to join Carl Basamania, M.D., as he performs a shoulder replacement with the Delta Xtend™ Reverse Shoulder System from DePuy Orthopaedics, Inc.

“Prosthetic Component Relationship of the Reverse Delta III Total Shoulder Prosthesis in the Transverse Plane of the Body.”  17.4 (2008): 602–607.

Another reverse prosthesis, Equinoxe of Exactech Inc (Gainesville, Florida), has been designed based on the principles of Delta III, but also in order to improve its weaknesses. Equinoxe combines a medialised COR along with a curved glenoid metal plate, which has a unique cylindrical hollow peg with holes in order to augment bone ingrowth and graft insertion. The humeral stem can be used for primary standard and for reverse arthroplasties and has less angle than the Grammont design in order for the humerus to be lateralised, without lateralising the COR[]. Patel et al. in 2012 published a case series of 28 shoulders with an average follow-up of 40.7 months. The patients has a failed primary arthroplasty which was revised to a reverse implant. At final follow-up, ASES averaged at 66.2, forward elevation to 108. The event of scapular notching was not reported in this series, as the authors found only three complications (10.7%) which consisted of a periprosthetic fracture, an infection and an anterior shoulder dislocation.

We report the results obtained with a reversed shoulder prosthesis (Delta prosthesis, De Puy) in seven patients with severe rotator cuff arthropathy.


Delta iii reverse shoulder prosthesis

The need for finding a suitable treatment for patients suffering from cuff tear arthropathy has been the basis for the evolvement of reverse shoulder arthroplasty. This unorthodox implant with promising but not very satisfactory results, when early design results were reported, has seen a substantial increase in the recent years in the creation of new prostheses and implantations. All designs that exist so far and their alterations according to the first Delta prosthesis are being analysed in this review.

Shoulder Resources - DePuy Synthes Institute

N2 - Background: Reverse shoulder arthroplasty changes the center of rotation (COR) of the glenohumeral joint and in doing so affects the resting tension in the deltoid and residual cuff muscles, as well as their respective moment arms. The purpose of this study was to assess the change in COR from the preoperative to postoperative state in a group of patients undergoing reverse shoulder arthroplasty. Materials and methods: The position of the COR in relation to a scapular coordinate system was determined for the anteroposterior and axillary radiographs before and after reverse total shoulder arthroplasty for 68 shoulders (63 patients) receiving either a Delta prosthesis or an Encore Reverse Shoulder Prosthesis. Results: Preoperatively, the COR was superiorly displaced a mean of 9 ± 7 mm from the origin of the coordinate system. For all shoulders, the postoperative COR was inferiorly displaced by 12 mm to a position 3 ± 3 mm below the coordinate origin (P

Reverse Shoulder Solutions - HCP | DePuy Synthes …

AB - Background: Reverse shoulder arthroplasty changes the center of rotation (COR) of the glenohumeral joint and in doing so affects the resting tension in the deltoid and residual cuff muscles, as well as their respective moment arms. The purpose of this study was to assess the change in COR from the preoperative to postoperative state in a group of patients undergoing reverse shoulder arthroplasty. Materials and methods: The position of the COR in relation to a scapular coordinate system was determined for the anteroposterior and axillary radiographs before and after reverse total shoulder arthroplasty for 68 shoulders (63 patients) receiving either a Delta prosthesis or an Encore Reverse Shoulder Prosthesis. Results: Preoperatively, the COR was superiorly displaced a mean of 9 ± 7 mm from the origin of the coordinate system. For all shoulders, the postoperative COR was inferiorly displaced by 12 mm to a position 3 ± 3 mm below the coordinate origin (P

Reverse Delta Shoulder Replacement Part 1 - YouTube

References:
1. Nyfeller, RW, et al. "Biomechanical Relevance of Glenoid Component Positioning in the Reverse Delta III Prosthesis." Journal Shoulder Elbow Surgery 2005 Sept-Oct; 14(5): 524-528. 2. Middernacht, BO, et al. "Anatomy of the Glenoid: Consequences For Implantation of the Reverse Prosthesis."