ArticleInternational orthopaedics2021
A kinematic and electromyographic comparison of a Grammont-style reverse arthroplasty combined with a l'Episcopo transfer compared to a lateralized humeral component reverse for restoration of active external rotation.
Article in International orthopaedics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.
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Who cites it
8 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.
- Tendon Transfers in Reverse Total Shoulder Arthroplasty: A Systematic Review.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2024Pooled it
- Lateralized Reverse Shoulder Arthroplasty vs. Medialized Design with Latissimus Dorsi Transfer for Cuff Tear Arthropathy with Loss of External Rotation and ER Lag Sign.Journal of clinical medicine · 2025Article
- A functional evaluation of the rotator cuff length after reverse total shoulder arthroplasty.JSES international · 2025Article
- Latissimus dorsi and teres major transfer in reverse shoulder arthroplasty: A systematic review.JSES reviews, reports, and techniques · 2024Review
- Tendon transfers in the setting of shoulder arthroplasty.JSES reviews, reports, and techniques · 2024Review
- Combined Lower Trapezius and Middle Trapezius Tendon Transfer for Posterior Superior Irreparable Rotator Cuff Tears: A Case Report.Journal of orthopaedic case reports · 2024Article
- Do Magnets Have the Potential to Serve as a Stabilizer for the Shoulder Joint in Massive Rotator Cuff Tears?: A Biomechanical Cadaveric Study.Clinics in orthopedic surgery · 2023Article
- Reverse total shoulder arthroplasty with latissimus dorsi and teres major transfer: biomechanical and electromyographical outcomes.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2023Article
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Authors and funding
11 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo assess kinematic and electromyographic findings of two designs of reverse total shoulder arthroplasty (RTSA). We tested two hypotheses: (H
methodsTwenty-five patients with a cuff tear arthropathy, pseudoparalysis, and a positive dropping sign were sequentially included. A Grammont-style RTSA with a l'Episcopo tendon transfer was implanted in 13 patients (medialized humerus and transfer group) and an on-lay curved-stem RTSA in 12 (lateralized humerus group). Constant score; the disabilities of the arm, shoulder, and hand (DASH) score; and active shoulder range of motion (flexion, abduction, external rotation, and internal rotation) were measured pre- and postoperatively. Upper limb kinematic and surface electromyography (EMG) (anterior and posterior deltoid; upper, middle, and lower trapezius; and the upper and lower latissimus dorsi muscles) were recorded during active range of motion.
resultsAt > 24 months of follow-up, the Constant and DASH scores and active shoulder range of motion improved in both groups (p < 0.0001). Internal rotation was significantly higher in the lateralized humerus group than in the medialized humerus and transfer group (p = 0.004). The dropping sign was found in 0/12 patients in the lateralized humerus group and in 5/13 patients in the medialized humerus and transfer group (p < 0.001). Kinematic findings were similar between groups (p = 0.286). A pattern of earlier muscle activation in the lateralized humerus group was found as compared to the transfer group as follows: (i) posterior deltoid during external rotation (p = 0.004); (ii) upper latissimus dorsi and middle and lower trapezius during flexion (p = 0.004, p = 0.005, and p = 0.042, respectively); (iii) lower latissimus dorsi during abduction (p = 0.016).
conclusionRTSA with a lateralized humeral component provided similar active external rotation restoration to a Grammont-style RTSA with a l'Episcopo procedure in patients with a dropping sign. The posterior deltoid muscle underwent earlier activation during active external rotation in the lateralized humerus RTSA group as compared to the tendon transfer group. Our findings demonstrated the H
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