ArticleJSES international2026
Effect of combined version on impingement-free rotational range-of-motion in three different implant types in reverse shoulder arthroplasty.
Article in JSES international, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed.
- Increasing reverse total shoulder liner constraint in clinically planned cases causes decreased simulated range of motion and LIMIT, a novel phenomenon.Journal of shoulder and elbow arthroplasty · 2026Article
- The role of glenoid version in arthroplasty.JSES reviews, reports, and techniques · 2026Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: The influence of combined humeral and glenoid component version on impingement-free range-of-motion (ROM) has not previously been evaluated in reverse total shoulder arthroplasty (rTSA). The purpose of this study was to determine the effects of combinations of humeral and glenoid component version on ROM in 3 different rTSA designs. We hypothesized that increased combined retroversion would decrease ROM. Methods: Nine patients with posterior glenoid bone loss indicated for rTSA underwent preoperative computed tomography of the shoulder. Virtual templating was performed using 3 different rTSA designs: medial glenoid-medial humerus, medial glenoid-lateral humerus (MG-LH), and lateral glenoid-medial humerus (LG-MH). Each implant was placed in different combinations of glenoid (10°, 0°, -10°, -20°) and humeral component version (0°, -10°, -20°, -30°, -40°). Virtual simulations of glenohumeral ROM were performed at 0°, 30°, and 90° abduction, with impingement-free internal rotation (IR), external rotation (ER), and combined IR and ER measured. A scapular contact mesh was created to determine impingement locations. A linear mixed effects model was used to assess the association between implant type and ROM. Chi-square tests were used to evaluate differences in impingement locations between implant types. Results: Total (IR and ER) ROM decreased with increasing combined component retroversion. ER ROM increased with more combined retroversion version until 30°, while the contrary was found for IR ROM. In the linear mixed effects model, implant type, glenoid version, and humeral version were significantly associated with total ROM. Compared to the LG-MH implant, the MG-LH implant was associated with increased ROM, and the medial glenoid-medial humerus implant was associated with decreased ROM. Changes in glenoid version were significantly associated with IR ROM but not ER ROM, while changes in humeral version significantly impacted both IR and ER ROM. The most common locations of bony impingement were the posterior scapular neck and anterior/posterior glenoid at 0° abduction; the anterior/posterior glenoid at 30° abduction; and the superior glenoid, coracoid, and acromion at 90° abduction. There were significant differences in impingement locations between implant types at all abduction positions ( Conclusion: This study demonstrates that total impingement-free ROM in rTSA decreases with combined component version greater than 30° of retroversion. The study also demonstrates increased total ROM with implant designs that create a more lateralized center of rotation (MG-LH, LG-MH). Impingement location changes with implant design, with less scapular neck impingement found with the LG-MH design. The study is limited by not being able to account for scapulothoracic motion or soft tissue considerations.
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