A 10-year comparative analysis of the 2 most common reverse total shoulder arthroplasty implants (Delta Xtend and SMR) in the New Zealand Joint Registry.
Scott M Bolam, Adam Stoneham, Mei Lin Tay, Chris M A Frampton, Peter C Poon, Ryan Gao, Brendan Coleman, Adam Dalgleish
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引用次数: 0
Abstract
Hypothesis and background: As the incidence of reverse total shoulder arthroplasty (rTSA) continues to rise, better understanding of the long-term risks and complications is necessary to determine the best choice of implant. The majority (75%) of rTSAs performed in New Zealand use either SMR (Systema Multiplana Randelli; Lima-LTO) or Delta Xtend (DePuy Synthes). The aim of this registry-based study was to compare implant survival, risk of revision, and reasons for revision between the 2 most frequently used rTSA prostheses: SMR and Delta Xtend.
Methods: Using data from the New Zealand Joint Registry between 1999 and 2022, we identified 5891 patients who underwent rTSA using either SMR cementless (62.8%) or Delta Xtend prostheses (37.2%). Delta Xtend was subdivided into cementless (31.4% of total) and cemented humeral stem (5.8% of total) subgroups for analysis. Revision-free implant survival and functional outcomes (Oxford Shoulder Score [OSS] at 6 months, 5 years, and 10 years were adjusted by age, American Society of Anesthesiologists [ASA] grade, indication, sex, and surgeon volume for between-group comparisons.
Results: Ten-year revision-free implant survival was 93.0%, 92.5%, and 95.8% for Delta Xtend cemented, Delta Xtend cementless, and SMR, respectively. The Delta Xtend cemented implant had a 2-fold higher adjusted revision risk compared with both the Delta Xtend cementless and the SMR cementless implants (hazard ratio [HR] = 2.04, P = .011; and HR = 2.59, P < .001, respectively). There was no significant difference between the Delta Xtend cementless and SMR cementless groups (HR = 1.28, P = .129). The Delta Xtend cemented group was significantly (P ≤ .01) older, had more comorbidities (ASA 3 or 4), female, and indicated for fracture compared with other groups. The most common reason(s) for revision was aseptic loosening and infection for Delta Xtend cementless; aseptic loosening, instability or dislocation, and infection for Delta Xtend cemented; and aseptic loosening alone for SMR cementless. Average OSS was significantly lower in Delta Xtend cemented compared with Delta Xtend cementless and SMR cementless at 6 months (30.8, 35.9 vs. 35.6, respectively, P < .01) and 5 years (37.4, 40.7 vs. 39.5, respectively, P < .01).
Conclusions: Overall, we found that the Delta Xtend cemented group had more than a 2-fold risk of revision compared with Delta Xtend cementless and SMR cementless groups, whereas there was no difference in revision risk between the Delta Xtend and SMR cementless prostheses. As the incidence of rTSA continues to rise, better understanding of the long-term risks and complications is necessary to determine the best choice of implant.
期刊介绍:
The official publication for eight leading specialty organizations, this authoritative journal is the only publication to focus exclusively on medical, surgical, and physical techniques for treating injury/disease of the upper extremity, including the shoulder girdle, arm, and elbow. Clinically oriented and peer-reviewed, the Journal provides an international forum for the exchange of information on new techniques, instruments, and materials. Journal of Shoulder and Elbow Surgery features vivid photos, professional illustrations, and explicit diagrams that demonstrate surgical approaches and depict implant devices. Topics covered include fractures, dislocations, diseases and injuries of the rotator cuff, imaging techniques, arthritis, arthroscopy, arthroplasty, and rehabilitation.