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DJO SURGICAL® REVERSE® SHOULDER PROSTHESIS (RSP®)

Reverse® Shoulder Prosthesis
A forward-thinking reverse

 

Center of Rotation
The Reverse Shoulder Prosthesis (RSP®) was the first reverse shoulder design to successfully incorporate a center of rotation (COR) lateral to the glenoid.

 

The RSP system features an anatomic humeral neck-shaft angle. Biomechanical testing has shown that having a humeral neck-shaft angle in the range of normal anatomy reduces the potential for inferior scapular notching.

 

For successful bony ingrowth, a stable interface between the bone and the prosthetic device is required during initial healing. The design of the RSP baseplate provides 2000N of compression between the prosthesis-bone interface, providing stable initial fixation as well as ideal conditions for bony ingrowth for long-term fixation.

Indications

  • Grossly rotator cuff deficient shoulder joint with severe arthopathy;
  • A previously failed joint replacement with a grossly rotator cuff deficient shoulder joint;
  • Evidence of upward displacement of the humeral head with respect to the glenoid;
  • Loss of glenohumeral joint space

 

Clinical Challenge
Patients presenting with an irreparable, rotator cuff deficient shoulder joint with severe arthropathy typically show evidence of an upward displacement of the humeral head with respect to the glenoid and a loss of glenohumeral joint space. Unfortunately, the functional outcomes using conventional surgical methods are severely limited and typically fail.

A great deal of variability can be experienced in rotator-cuff-deficient shoulders. The RSP system offers unmatched versatility, in size and offset, of glenospheres to manage complex anatomy and surgical outcomes.

 

The RSP is one of the most well-published reverse shoulders on the market with over forty peer reviewed journal publications.

 

Clinical Solution
The Reverse® Shoulder Prosthesis is a semiconstrained design concept that reverses the shoulder anatomy by lateralizing the shoulder joint to effectively resist the superior pull of the deltoid muscle and optimize soft tissue balancing.

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SPECIFICATIONS

Positioned approximately 12mm below the resected humeral neck osteotomy to ensure that the humeral socket is surrounded by proximal bone support for strength, stability and fixation. 
  • Anatomical-shaped proximal body
  • Cylindrical-shaped distal segment with cement flutes
  • Cemented application only
  • Primary stem: 6 x 101mm, 7 x 105mm, 8 x 109mm, 10mm x 116mm, and 12mm x 124 mm
  • Revision sizes: 6mm, 8mm, 10mm, and 12mm in one length of 175mm

 

 

Stabilizes the superior and medial pulling forces of the deltoid muscle to restore joint mobility and minimize the risk of bone erosion caused by impingement of the humeral socket against the inferior aspect of the glenoid. 

  • Morse taper fixation to the humeral stem
  • Shell sizes: neutral, +4mm offset, and +8mm offset
  • 18 different sizing configurations
  • Insert sizes: 32mm, 36mm, and 40mm in both standard and semi
  • Titanium alloy constrained option

 

 

Delivers a force of resistance against humeral socket/glenoid head combination to prevent superior escape of the humerus for long-term stability and wear characteristics.

  • Reverse Morse taper fixation to the glenoid baseplate
  • Sizes: 32mm, 36mm, and 40mm available in neutral or -4mm offset
  • 3.5mm titanium alloy retaining screw mates into glenoid head for additional security

 

 

Centralized 6.5mm cancellous bone screw with four peripheral 5.0mm locking or 3.5mm non-locking cortical bone screws deliver outstanding fixation and long-term stability.

  • Hydroxyapatite coating plasma sprayed over 3DMatrix® porous coating
  • 5.0mm locking cortical bone screws for perpendicular placement
  • 3.5mm non-locking cortical bone screws for angled placement in any direction up to 12 degrees
  • 26mm diameter baseplate in one length of 30mm


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