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. 2021 Aug;13(4):416-425.
doi: 10.1177/1758573220909981. Epub 2020 Mar 24.

Radiographic and clinical outcomes of second generation Trabecular Metal™ glenoid components in total shoulder arthroplasty

Raymond E Chen  1 , Alexander M Brown  1 , Alexander S Greenstein  1 , Sandeep Mannava  1 , Ilya Voloshin  1
Affiliations

Radiographic and clinical outcomes of second generation Trabecular Metal™ glenoid components in total shoulder arthroplasty

Raymond E Chen et al. Shoulder Elbow. 2021 Aug.

Abstract

Background: Total shoulder arthroplasty with second generation porous tantalum glenoid implants (Trabecular Metal™) has shown good short-term outcomes, but mid-term outcomes are unknown. This study describes the clinical, radiographic, and patient-rated mid-term outcomes of total shoulder arthroplasty utilizing cemented Trabecular Metal™ glenoid components.

Methods: Patients who underwent anatomic total shoulder arthroplasty with cemented Trabecular Metal™ glenoid components for primary osteoarthritis were identified for minimum five-year follow-up. The primary outcome measure was implant survival; secondary outcome measures included patient-rated outcome scores, shoulder range of motion findings, and radiographic analysis.

Results: Twenty-seven patients were enrolled in the study. Twenty-one patients had full radiographic follow-up. Mean follow-up was 6.6 years. There was 100% implant survival. Shoulder range of motion significantly improved and the mean American Shoulder and Elbow Society score was 89.8. There was presence of metal debris radiographically in 24% of patients. Twenty-nine percent of patients had evidence of radiolucency. Fourteen percent of patients had moderate superior subluxation.

Conclusion: Total shoulder arthroplasty with second generation cemented Trabecular Metal™ glenoid components yielded good outcomes at mean 6.6-year follow-up. Metal debris incidence and clinical outcomes were similar to short-term findings. The presence of metal debris did not significantly affect clinical outcomes. Continued observation of these patients will elucidate longer-term implant survival.

Keywords: Trabecular Metal™ glenoid; glenoid component; metal debris; metal-backed glenoid; total shoulder arthroplasty.

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Conflict of interest statement

Declaration of Conflicting Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article: SM has or may receive payments or benefits from Arthrex unrelated to this work. IV has or may receive payments or benefits from Zimmer Biomet related to this work. IV has or may receive payments or benefits Arthrex, Arthrosurface, Innomed, and Smith & Nephew unrelated to this work. The other authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Figures

Figure 1.
Figure 1.
Example of study patient at 8.9-year follow-up. (a) Anteroposterior radiograph and (b) axillary lateral radiograph. Grade 0 metal debris, Grade 0 radiolucent lines, mild superior migration, no A/P subluxation. This patient had an ASES score of 95, FF to 156°, ER to 48°, and LE to 157°.
Figure 2.
Figure 2.
Example of study patient at 5.7-year follow-up. (a) Anteroposterior radiograph and (b) axillary lateral radiograph. Grade 2 metal debris, Grade 2 radiolucent lines, moderate superior migration and mild A/P subluxation. No evidence of gross component loosening or component fracture. This patient had the worst radiographic grades in this cohort, but still demonstrated excellent clinical outcomes, with an ASES score of 95, FF to 152°, ER to 58°, and LE to 153°.
See this image and copyright information in PMC

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