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DELTA XTEND™ Reverse Shoulder System
The DELTA XTEND System is a total semi-constrained shoulder arthroplasty. It reverses the normal relationship between the scapular and humeral components, moving the scapulo-humeral joint center of rotation medially and inferiorly.
Features & Benefits
Cementless Modular Humeral Implant
- Fluted stem design based on the GLOBAL™ Shoulder Stem Design - positioned in anatomic version for optimal press-fit fixation1
- Hydroxyapatite (HA) coated titanium alloy for cementless application2,3
- Centered and eccentric options to suit anatomy and optimize press-fit fixation
- 155° neck shaft angle for optimal joint stability4
- Reduced proximal geometry for bone preservation
Cemented Monobloc Humeral Implant
- Polished Cobalt Chromium alloy for optimised cemented fixation5
- Reduced proximal geometry for bone preservation
- Standard and long monobloc stems with suture hole fins and proximal height laser markings on the trial stem for use in proximal bone loss cases
Polyethylene Humeral Cups
- Three cup thicknesses (+3, +6 and +9mm) to balance soft tissue for optimal deltoid function based on clinical heritage6
- Centre of rotation on glenoid bone surface for high resistance to loosening shear forces4
- Two locking cannulated variable angle screws (compress and lock) and two compression screws with +/- 10 degrees adjustable angulation for metaglene primary fixation, designed to enhance resistance to loosening shear forces4
- Curved back and smaller metaglene, for bone preservation and low positioning on the glenoid to reduce risk of scapular bone erosion7
- Standard (13.5mm) and Long Peg (+10mm and +15mm) Metaglenes allow for primary, revision and bone grafting
DELTA XTEND CTA Heads
- Hemi-heads available in two diameters and two head heights to facilitate revision from reverse to hemi-arthroplasty if required
- Extended articular surface for articulation against acromion
In cases of substantial glenoid bone erosion, lateralization of the metaglene/glenosphere construct may be beneficial.8 This may be accomplished by autograft or through the lateralization of the glenosphere.
With 16 lateralization implant options to choose from, the surgeon can accurately re-approximate the patient’s natural joint line and may help to gain impingement-free range of motion.9
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1. Matsen FA III, Iannotti JP, Rockwood CA Jr. Humeral fixation by press-fitting of a tapered metaphyseal stem: a prospective radiographic study. Journal of Bone and Joint Surgery. 2003;85A(2)304-308.
2. Gross KA, Walsh W, Swarts E. Analysis of retrieved hydroxyapatite-coated hip prostheses. Journal of Thermal Spray Technology 2004; 13(2): 190-199.
3. Head, W.C., et. al. “Titanium Alloy as a Material of Choice for Cementless Femoral Components in Total Hip Arthroplasty,” Clinical Orthopaedics and Related Research 1995; 311:85-90
4. Boileau, P., et. al. “Grammont Reverse Prosthesis: Design Rationale and Biomechanics.” Journal Shoulder Elbow Surgery 2005; 14: 147-161
5. Collis, D., et. al. “Comparison of Clinical Outcomes in Total Hip Arthroplasty Using Rough and Polished Cemented Stems with Essentially the Same Geometry.” Journal of Bone and Joint Surgery. ORG, 2002; 84A: 586 - 592
6. Sirveaux, F., et. al. “Grammont Inverted Total Shoulder Arthroplasty in the Treatment of Glenohumeral Osteoarthritis With Massive Rupture of the Cuff. Results of a Multicenter Study of 80 Shoulders.” Journal of Bone Joint Surgery Br 2004; 86: 388-395
7. De Wilde L, Poncet D, Middernacht B and Ekelund A. Prosthetic overhang is the most effective way to prevent scapular conflict in a reverse total shoulder prosthesis. Acta Orthopaedica, 2010, 81(6); 719-726
8. Paisley K, Kraeutler M, Lazarus M, Ramesy M, Williams G, and Smith M. “Relationship of scapular neck length to scapular notching after reverse total shoulder arthroplasty by use of plain radiographs,” J. Shoulder Elb. Surg., (2014) 23, 882-887.
9. Kim SJ, Jang SW, Jung KH, Kim YS, Lee SJ, and Yoo YS. Analysis of impingement-free range of motion of the glenohumeral joint after reverse total shoulder arthroplasty using three different implant models. Journal of Orthopaedic Science 24 (2019) 87-94.
For product details such as indications, contraindications, warnings and precautions please consult the IFU and Surgical Technique.
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