The Midterm Results of the Delta Xtend Reverse Shoulder System: A Five-Year Outcome Study



The Rothman Institute at Thomas Jefferson University, Philadelphia, PA, USA


Background: The purpose of this study was to examine the mid-term functional outcomes, radiographic results,
and revision rates of patients treated with the Delta Xtend Reverse Shoulder System for both primary and revision
arthroplasty indications.
Methods: A retrospective review was conducted of records for all individuals who underwent a reverse shoulder
arthroplasty using the Delta Xtend Reverse Shoulder Prosthesis at a single institution. Radiographic analysis as well as
pain and functional measures using the ASES, Quick DASH, SST, SF-12, Penn, SANE, EQ-5D and VAS, and VR-12
scores. Patients were evaluated for five-year outcomes.
Results: Fifty patients were available for 5-year outcomes. Thirty-three cases were primary arthroplasty cases and
17 were revision arthroplasty cases. Postoperative radiographs at five years out from surgery were available for 46
patients. The mean AGT overall was 32.6mm: 31.7mm the primary cases and 34.8mm for revision cases. Sirveaux
scapular notching was: 65.2% (30/46) at Grade 0, 23.9% (11/46) at Grade 1, and 10.9% (5/46) at Grade 2. Overall,
32/46 of stems were in neutral position, 10/46 were in valgus position, and 4/46 were in varus position. There was no
significant correlation between stem position and scapular notching. The mean outcome scores for all patients at five
years were good to excellent. Two revision patients demonstrated loosening of the humeral stem on radiographs. Nine
patients demonstrated calcification of the long head of the triceps tendon.
Conclusion: In conclusion, the Delta Xtend Reverse Shoulder System has shown to be a reliable arthroplasty
system for patients with CTA or failed prior arthroplasty. Patients are generally quite functional at five years out from
their reverse shoulder arthroplasty using this implant. Radiographic measures used to interpret the status of the
implant demonstrate that AGT is well maintained and scapular notching is minimal for the majority of cases.
Level of evidence: IV


Main Subjects