Alexandre Almeida¹*, Daniel Cecconi Agostini², Pedro Bossardi³, Daniela Gravina³, Guilherme Cobalchini³ and Samuel R Pante⁴

¹Orthopedic Surgeon MBBS, Pompeia Hospital, Caxias do Sul, RS, Brazil
²Radiologist, Physician, MBBS General Hospital, Caxias do Sul, RS, Brazil
³Third-year Fellowship Resident at Pompeia Hospital, BM, Caxias do Sul, RS, Brazil
⁴Orthopedic Surgeon, MBBS, São João Bosco Hospital, São Marcos, RS, Brazil

*Corresponding Author: Alexandre Almeida, Orthopedic Surgeon MBBS, Pompeia Hospital, Caxias do Sul, RS, Brazil.

Received: April 09, 2025; Published: April 24, 2025

Abstract

Objective: To verify the accuracy of positioning reverse augmented baseplates using a conventional technique based on preoperative planning in a specific software, and whether greater glenoid bone deformity led to a higher incidence of positioning errors by surgeons.

Methods: Fifty-six patients who underwent reverse shoulder arthroplasty were evaluated using postoperative computed tomography. The computed tomography images were analyzed by a radiologist who was blinded to each patient’s data.

Results: Average age of the patients was 73 years (standard deviation ± 7.3 years). Preoperative glenoid inclination measured using Drive Case Management System® was an average of 4.7° of superior inclination (from -15.5° of superior inclination to 3.5° of inferior inclination, standard deviation ± 4.04°). Preoperative glenoid version measured using OneDrive® was an average of 4.8° of retroversion (from -8° of anteversion to 21.5° of retroversion, standard deviation ± 5.90°). Baseplate inclination measured on postoperative tomography was an average of 0.7° of inferior inclination (from -10.6° of superior inclination to 20.2° of inferior inclination, standard deviation ± 5.33°). In 47 (83.9%) patients, the baseplate inclination was within an angular arc of 5° superior inclination and 10° inferior inclination.

Conclusion: Preoperative planning in OneDrive® and the use of augmented baseplates by the conventional technique allowed precision in the positioning of implants with regard to the version and inclination of the reverse baseplate. Therefore, a higher positioning error rate is possible in patients with greater glenoid bone deformity.

Keywords: Shoulder; Surgery; Arthroplasty; Computed Tomography; Orthopedics and Traumatology

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Citation

Citation: Alexandre Almeida., et al. “Tomographic Analysis of the Positioning of Reverse Augmented Baseplates in Relation to Preoperative Planning".Acta Scientific Orthopaedics 8.5 (2025): 48-55.

Copyright

Copyright: © 2025 Alexandre Almeida., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.