Variability in Preoperative Planning for Reverse Shoulder Arthroplasty
Author Information
Author(s): Geraldo da Rocha Motta Filho, Marcus Vinicius Galvão Amaral, Luis Gustavo Prata Nascimento, André Couto Godinho, Caio Santos Checchia, Raffaelli Mauricio de Paiva, Rafael Peçanha Pitta, Ana Carolina Leal
Primary Institution: Instituto Nacional de Traumatologia e Ortopedia Jamil Haddad, Rio de Janeiro, RJ, Brasil
Hypothesis
Multiple surgeons will plan the same case with intersurgeon variability and that planning on separate occasions will reveal intrasurgeon variability.
Conclusion
This study highlights the lack of consensus on implant positioning parameters during reverse shoulder arthroplasty planning, with most surgeons tending to plan for zero degrees of version and inclination.
Supporting Evidence
- 76% of cases chose a 25-mm diameter metal base.
- 34% of cases planned for a final version of 0°.
- 58% of cases intended a final inclination equal to 0°.
- 80% of planning used a 10-mm asymmetrical graft.
Takeaway
Surgeons often disagree on how to plan for shoulder surgery, but most try to aim for the same angles when placing implants.
Methodology
A cross-sectional study assessed CT images of the shoulder joint from patients with degenerative joint diseases, with seven specialists planning cases twice to evaluate variability.
Limitations
The study was conducted at a single center with more severe deformities than typically found in clinical practice, and surgeons lacked access to patient clinical information.
Participant Demographics
Patients included both genders, aged over 18, with primary or secondary degenerative shoulder diseases.
Statistical Information
Confidence Interval
0.629–0.822 for version, -0.04–0.501 for inclination
Digital Object Identifier (DOI)
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